Answer: A, a structure that has no use in the organism
Explanation:
A vestigial structure is an anatomical feature that no longer seems to have a purpose in the current form of an organism of the given species.
A vestigial structure refers to option A, "A structure that has no use in the organism."
Vestigial structures are remnants of anatomical features that were functional in the ancestors of a particular organism but have lost their original function in the present-day organism. These structures may have had a purpose in the past, but due to evolutionary changes, they no longer serve any significant function.
Vestigial structures can be observed in various organisms, and they are often considered as evidence for evolution, highlighting the idea that organisms have inherited traits from their ancestors that may no longer be necessary or useful in their current environment.
Hence the correct option is A.
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economic importance of scorpion
Explanation:
ANTIVENOM PRODUCTION: venomous scorpion species are used to produce antivenom for treating enevenomation, safeguarding human health in regions where these arachnids are a threat. TOURISM: scorpion-centric eco-tourism can stimulate local economies through guided tours and related servicesWhat is it called when molecules move from low to high concentration across plasma membranes?
Answer: Osmosis
Explanation: Osmosis is a process in which water move from an area of low solute concentration to an area of high solute concentration through a selectively permeable membrane. For osmosis to occur, it must be through a selectively permeable membrane. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.
Active transport is the process whereby molecules move from areas of low concentration to areas of high concentration across plasma membranes, which requires energy usually in the form of ATP.
Explanation:When molecules move from an area of low concentration to an area of high concentration across plasma membranes, the process is called active transport. This is in contrast to passive transport, where molecules move from high to low concentration. Active transport requires energy in the form of ATP because the molecules are moving against the concentration gradient. An example of this would be the sodium-potassium pump found in many cell membranes. This protein pump uses ATP to move sodium ions out of the cell and potassium ions into the cell, both against their respective concentration gradients.
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Which conditions are necessary for natural selection to occur? Select all of the answers that apply.
A.
Inheritable adaptations vary among individuals.
B.
The population size is increasing.
C.
More individuals are born than can survive.
D.
Fitness varies among individuals.
E.
The environment changes suddenly and drastically.
Answer:
A,C,D
Explanation:
i took the test!
Natural selection requires inheritable variations among individuals, more individuals being born than can survive, and varying levels of fitness among individuals.
Explanation:For natural selection to take place, certain conditions must be fulfilled. These include options A - Inheritable adaptations vary among individuals, C - More individuals are born than can survive, and D - Fitness varies among individuals.
A - Inheritable adaptations vary among individuals: This means that individuals within a population have different traits, and these traits can be passed down to their offspring.
C - More individuals are born than can survive: This refers to the concept of struggle for existence, where the resources are limited, but the organisms born are more than the resources can sustain, leading to a competition.
D - Fitness varies among individuals: This refers to differential survival and reproduction. Individuals with traits that give them an advantage in their environment are more likely to survive and reproduce, thus passing on those traits to future generations.
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Active transport requires energy because it usually involves the movement of
A.
substances from an area of low concentration to an area of high concentration.
B.
substances from an area of high concentration to an area of low concentration.
C.
substances in the gas phase, such as oxygen and carbon dioxide.
D.
substances that can easily pass through the cell membrane, such as water.
Active transport requires energy because it usually involves the movement of substances from an area of low concentration to an area of high concentration.
What is active transport?Active transport is the movement of a substance into or out of the cell. The movement is against the concentration gradient, and the movement is from lower concentration to higher concentration.
Example is diffusion.
Thus, the correct option is A.
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Which of the following processes releases carbon dioxide into the
atmosphere?
Answer:
cellular respiration
Explanation:
All of the following statements were part of the original cell theory proposed by Schleiden and Schwann, and many others including Remak and Virchow, with the EXCEPTION of
A) all cells come from other cells.
B) the cell is the most basic unit of life.
C) all living things are composed of one or more cells.
D) viruses are not living since they are smaller than a cell.
Answer:
viruses are not living since they are smaller than a cell.
Explanation:
Have a good day :)
The viruses are not living as they are smaller than a cell. Thus the option D is correct.
What is the cell theory of schledien and Schwann?The botanist and zoologists were studying tissues and proposed a theory that states that living things are made up of one or more cells and they are a basic unit of life. The new cells grow from the existing ones.
They gave the theory in 1838 on the basis of a comparison of plants and animal cells. The virus don't have cells that are larger enough and hence they are not living.
Find out more information about the original cell theory.
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The moon rotates around the earth at a speed of 2,288 miles per hour. Is the moon accelerating?
Answer:
Yes, the moon is accelerating.
Explanation:
The moon is known to orbit around the sun at an average speed of 2,288 miles an hour. This translates to about 3,386 kilometers an hour. Further, it means that through its whole period of acceleration, it travels a distance of about 1,423,000 miles or 2,290,000 kilometers.
I’m a scientific investigation the term quantitative data refers to niñera that are usually followed by
Answer:
In a scientific investigation the term quantitative data refers to numbers that are usually followed by a unit.
Explanation:
A scientific investigation can be described as an investigation which is made through the scientific method of research. A scientific question is often tried to be answered through valid experiments by this method. The experiments performed can either be quantitative or qualitative. Quantitative data is the data which is taken through mathematical or statistical methods and has a well-defined unit in which the measurements or numbers are being taken.
Choose two of the early cell formation hypotheses and discuss their differences:
The two different hypotheses of the origin of early cell structure are the iron-sulfide bubbles hypothesis and the lipid membrane hypothesis
Explanation:
The iron-sulfide bubbles hypothesis by William Martin and Micheal Russel originated from small-sized compartments formed with iron sulfide bubbles which were lying on the ocean floor. These compartments had organic matter trapped inside them and which developed further and started to be bounded by their own cell membrane.
The lipid membrane hypothesis by Harold Morowitz proved that liposomes with the double lipid membrane formed organic material and could be separated from the environment. This theory stated that the cells were formed by the surrounding organic molecules .
The "heterotrophic origin" posits cells relied on external organic molecules, while the "autotrophic origin" suggests cells synthesized their own from inorganic sources.
Two early hypotheses regarding the formation of cells are the "heterotrophic origin" and the "autotrophic origin."
1. **Heterotrophic Origin**: This hypothesis suggests that the first cells were heterotrophic, meaning they relied on pre-existing organic molecules for energy and carbon sources.
According to this theory, these primitive cells may have formed in environments rich in organic compounds, such as primordial soups or deep-sea hydrothermal vents.
The cells absorbed nutrients from their surroundings, gradually evolving mechanisms to harness energy from available organic molecules. The key point here is that these early cells did not produce their own organic molecules but relied on external sources.
2. **Autotrophic Origin**: In contrast, the autotrophic origin hypothesis proposes that the first cells were autotrophic, meaning they could synthesize their own organic molecules from inorganic sources, such as carbon dioxide.
These early cells might have utilized energy from sources like sunlight or chemical reactions to drive the synthesis of complex organic compounds. Unlike heterotrophic cells, autotrophic cells could produce their own energy and carbon-containing molecules independently of external sources.
The main difference between these hypotheses lies in how they suggest early cells obtained organic molecules: heterotrophic cells absorbed them from the environment, while autotrophic cells synthesized them internally.
Which of the following types of solutions should be used when preparing a wet mount? (Circle one.) a. hypertonic b.hypotonic c.isotonic
Answer:
Which of the following types of solutions should be used when preparing a wet mount?
Hypotonic solution is used to prepare a wet mount
Explanation:
In using an hypotonic solution to prepare such wet, this enable the solution to absorb water from the solution as a result of not having enough content in the cell
Final answer:
An isotonic (option c) solution should be used when preparing a wet mount because it maintains the natural shape and function of cells. Hypotonic and hypertonic solutions can cause cells to swell or shrink, respectively, which can interfere with observations.
Explanation:
When preparing a wet mount, the type of solution that should be used is an c. isotonic solution. An isotonic solution has the same solute concentration as the cells, preventing net movement of water into or out of the cells. In this balanced state, cells maintain their normal shape and function, which is crucial for observing them under a microscope.
In a hypotonic solution, the concentration of solute is less than that inside the cells, causing water to enter the cells. This results in the cells swelling and potentially bursting. Conversely, in a hypertonic solution, the concentration of solute is higher outside the cells than inside, leading to water leaving the cells and causing them to shrink or collapse. These conditions are not ideal for observing the true structure of cells in a wet mount.
Extend your thinking: In living organisms, the cell cycle is closely regulated. What do you
think will happen if cell division is not controlled?
Final answer:
Uncontrolled cell division can lead to the development of tumors and cancer, as cells may not perform their functions correctly and could proliferate excessively. This is normally prevented by a tightly regulated cell cycle, controlled by a series of checkpoints and signaling mechanisms.
Explanation:
If cell division is not controlled in living organisms, the consequences can be dire. Cells may not perform their necessary functions properly, leading to abnormal growths like cancer. Healthy cells normally undergo regulated cycles of growth, DNA replication, and division, which include critical checkpoints to ensure everything is proceeding correctly. However, uncontrolled cell division can occur if there are failures of cell cycle control, often due to genetic abnormalities or environmental damage to DNA. These conditions can lead to rapid and uncontrolled growth of abnormal cells, forming tumors that may be benign or malignant—cancerous—depending on their potential to harm surrounding tissues.
The cell cycle is normally tightly controlled by a complex system that includes both internal regulators and external signals. These regulatory mechanisms are crucial for maintaining cellular and organismal health. Loss of this control, often through mutations or external factors, leads to diseases like cancer. It's a balance of 'stop' and 'go' signals that direct cell cycle control, and any disruption can result in excessive cell division and tumor formation, potentially leading to serious health issues or death.
6. Adaptations that result from natural selection are expected to increase the fitness of an organism.
In terms of natural selection, which of the following best describes fitness?
a. Being able to escape from predators
b. Being among the strongest organisms in a population
c. Being able to survive, find a mate, and produce offspring
d. Being able to survive long enough to reach the adult stage
Answer:
C: Being able to survive, find a mate, and produce offspring
Explanation:
The population is an important factor to the increased fitness of the organism, being able to reproduce would lead to the population of that organism to be more healthy.
Adaptation is the process by which a species adapts to its surrounding environment during evolution. Being able to survive, find a mate, and produce offspring, best describe the fitness of the organism.
Natural Selection:
It is the process by which the most appropriate organism survives and increases its population.
In a population, organisms vary in some traits, these traits may increase the chances of survival of individual over others.The variation can also decrease the chances of survival.For example, A red color butterfly is more susceptible to being eaten by predators while for a green color butterfly, there are more chances of survival.Therefore, Being able to survive, find a mate, and produce offspring, best describe the fitness of the organism.
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Give 3 reasons that the world's oceans so important to life on Earth.
Answer:
the ocean provides water, food, and gives a home to sea animals.
Explanation:
Why are estuaries, such as the Pamlico Estuary, so important?
Answer:
An estuary can be described as an area of brackish water where different rivers or streams meet the open sea. Hence, an estuary forms a transition zone between an river environment and a marine environment.
Estuaries hold a lot of importance and are referred to as the nurseries of the sea. The estuary are home to many unique kinds of organisms. Certain kinds of fishes and shellfishes which humans consume cone from this area of the sea. There are high levels of nutrients moving in the estuary zone of the sea. Due to its shallow water, Pamlico estuary provides opportunities for fishing, crabbing and water- sports activities.
Estuaries like the Pamlico Estuary are crucial due to their commercial and biological significance.
Estuaries, such as the Pamlico Estuary, play a significant role both commercially and biologically.
They are home to many of the world's metropolitan areas, serving as ports for industrial activity and supporting large human populations.Biologically, estuaries are incredibly important because they act as nursery grounds for many species of fish, birds, and invertebrates. The mixing of fresh and salt water in estuaries creates a brackish environment that is rich in nutrients, promoting biodiversity and sustaining various life forms.Salinity in estuaries varies with the influx of seawater and outflow of freshwater, which influences the types of organisms and their adaptations. Many species in estuaries have developed specialized adaptations to cope with these varying salinity levels.Furthermore, estuaries contribute to the economy by providing areas for industrial activities and ports. These areas also offer recreational opportunities and help in filtering pollutants from rivers before they reach the ocean, thus maintaining environmental health.Which is a component of a phospholipid?
carbon ring
• hydrophilic head
long-chain alcohol
amino acid
Answer:
b
Explanation:
Work a punnett square for a father who is type A heterozygous and the mother is type B heterozygous.
What is the phenotypic ratio?
Answer:
Work a punnett square for a father who is type A heterozygous and the mother is type B heterozygous.
Ab X Ba = AB, Aa, Bb, and ab
Explanation:
Father type A has 50% while type B which is the mother has 25% and while 25% co-recessive trait.
What is the energy transformation taking place as a moving roller coaster slowly climbs a steep hill?
Potential energy to kinetic energy
Kinetic energy to potential energy
Radiant energy to chemical energy
Chemical energy to radiant energy
Answer:
Potential energy to kinetic energy
Explanation:
The answer is kinetic to potential because at the highest point of the track it has the highest amount of energy so at the bottom of the hill it has the highest amount of kinetic. And as it gradually climbs the steep hill it gaines more potential energy!
True or false: even when your research does not support your hypothesis, the hypothesis has value.
Answer:
True
Explanation:
How does cellular respiration help you body perform life functions?
Answer:
Cellular Respiration Lets Organisms Capture Glucose Energy
Cellular respiration converts the chemical energy stored in glucose into chemical energy stored in the ATP molecule. ATP is used by all cells to power their metabolism and their activities. ... They then use the ATP energy for activities such as muscle contracting.
Explanation:
Answer: Cellular respiration help your body perform life functions by providing you with energy, and acting as a way to get rid of carbon dioxide from your body.
Explanation: When cellular respiration is complete, energy, water, and carbon dioxide will be produced. Energy will be used by your body, and carbon dioxide will be removed from your body into the air. Plants perform cellular respiration but produce oxygen and glucose, the things that your body needs to perform cellular respiration.
Which of the following Gametes can be formed from the following genotype: TtYy.
A. YY
B. tY
C. ty
D. TY
E. Ty
F. Tt
Gametes can be formed from the following genotype: TtYy are
B. tY
C. ty
D. TY
E. Ty
Explanation:
The gametes are formed by meiosis of the cell.
The cell with genotype TtYy will form four different types of gametes.
The cross is shown in the diagram attached.
The alleles of TtYy separates and form gametes by all possible combinations.
Four types of gametes formed by TtYy are - tY, ty, TY, Ty
Which of the following reasons best explains why a scientist would want to examine a possible link between modern women waiting longer to have children and an increase in the number of female babies?
A.
to test the predictions of current theories
B.
to discover new aspects of the natural world
C.
to test the conclusions of prior investigations
D.
to explain recently observed phenomena
Reset Submit
Answer:
D
Explanation:
Brain
A scientist performs scientific investigations to test the hypothesis and reach a conclusion. The best reason for examining the link includes an explanation of the recently observed phenomena. Thus, option D is correct.
What are scientific investigations?Scientific Investigation is defined as the discovery of new information that involves asking questions and researching to solve the problem and reach a solution. It involves testing the hypothesis that begins with observations.
The observation that women tend to give birth at late ages and the increase in the number of the frame population are used to conduct the scientific investigation so as to prove and explain the observed phenomena.
Therefore, option D. the scientific investigation uses the observed phenomena to explain the information.
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What covers the ends of bones in adults?
A blood
B cartilage
C marrow
D ligaments
Answer: cartilage
Explanation: Cartilage is a type of connective tissue, tough and flexible that serves as a protection to the ends of the bones and allows them to move. Cartilage is made up of a dense network of collagen fibres in a gelatinous substances. There are three main types of cartilage: hyaline cartilage, elastic cartilage and fibrocartilage.
When astronauts sleep in space, they sleep in small cabins or in sleeping bags that are attached to the wall of the station.
Which condition requires them to attach their sleeping bags to the wall?
Answer:
Low gravity
Explanation: i would assume? :)
Answer:the answer is FREE FALL
Explanation:
Just answered it
What are pharyngeal pouches, and how are
they evidence of evolution?
Answer:
Their similarity
Explanation:
Pharyngeal pouches are structures in vertebrates that develop in different parts of the body mainly in the face or neck. The similarity in their position and structural indicates a similarity . These structures provide evidence of evolution that the organisms evolved from the same ancestry.
A pharyngeal pouch (also known as Zenker's diverticulum) is a tiny bulge or pocket in the pharynx, similar to a hernia.
Pharyngeal pouches are transformed into different organs during evolution. This shows the relationship between different organisms using the pharyngeal pouch for different use.
Pharyngeal pouchIn embryological development, pharyngeal pouches are endodermal out-pockets that arise between the pharyngeal arches.The pouches give rise to tissues that comprise the middle ear cavity and Eustachian tube, as well as the palatine tonsils, thymus, parathyroid glands, and thyroid parafollicular cells.Thus, this is how the pharyngeal pouches are the evidence of evolution.
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Sierra decides to write down everything she likes to eat. Then, she draws branches under each animal on the list and writes everything they like to eat, and so on until she is down to all plants at the bottom of the page. What did Sierra make a diagram of?
Which of these sounds has the largest amplitude?
Select one:
a. a deep, loud blast from a tuba
b. a leaf crunching underfoot
c. a light tap on a drum
d. a flute playing a soothing high-pitched note
Answer:
its A
Explanation:
What are the end products of the electron transport chain?
The end products of electron transport chain are:
Water
Adenosine triphosphate (ATP)
Explanation:
Most of the free energy released during the oxidation of glucose to CO₂ is retained in the reduced co-enzyme NADH and FADH₂, generated during the kreb's cycle.Electron are released from these co-enzymes and are eventually transferred to an oxygen molecule to form water.These transfer of electron from co-enzymes to oxygen molecule occurs through a series of protein complexes in the mitochondrial membrane. And the process is termed as Electron Transport Chain.The large amount of free energy is released during the oxidation of NADH and FADH₂ is used in the production of ATPMatch the components of MSW landfill to its description.
Municipal Solid Waste (MSW) landfill is a discrete area of land that recieves household waste.
Explanation:
Leachate collection System - A system of pipes that collect contaminated water that seeps into the bottom of a landfill.
Cells - They are approved areas for waste disposal.
Bottom liner - The landfill part that prevents the contact of burried waste with underlying soils and groundwater.
Groundwater Monitoring System - They are built to test the presence of leachate chemicals in the groundwater around landfill.
This is a photograph of a maritime forest on the coast of South Carolina. Notice the Spanish moss hanging from the tree branches. Spanish moss is a ___________ and the oak tree is its host.
A) predator
B) parasite
C) producer
Eliminate
D) disease agent
Answer:
I hope this really helps
Explanation:
Because the tree is called the host, and the moss is living off of the tree, that makes the moss a parasite.
For a each parasite, it must have a host that provides food and nutrients for it. Or else the parasite cannot survive.
Temperate grasslands and
are two biomes that are dominated by grass species, share similar wildlife, and have
few
. However, while temperate grasslands have
the other grassland biome
has
Reset
Next
Answer:
Temperate grasslands and tropical savannas are two biomes that are dominated by grass species, share similar wildlife, and have few trees. However, while temperate grasslands have hot summers and cold winters, the other grassland biome has both rainy and dry seasons
these are the correct answes
Explanation:
Answer:
First Blank: tropical savannas
Second Blank: trees
Third Blank: hot summers and cold winters
Fourth Blank: both rainy and dry seasons
[tex]\hrulefill[/tex]
First Blank:Another biome of grass lands is called the tropical savannas and like the temperate grassland, the tropical savannas are also majorly composed of different species of grasses and holds similar species.Second Blank:Temperate grasslands and tropical savannas also have few trees and this is one of the important features that define grassland biomes.Third Blank:Temperature grasslands are characterized by regional climates with variations which are: hot summers and cold winters.Fourth Blank:Tropical savannas, have areas with more rainfall and those with less rainfall and this determines the nature of the vegetation and animal life in the region.[tex]\hrulefill[/tex]