T-cells reach maturity in the Thymus
Explanation:
The thymus is a lymphoid organ located in front of the heart and behind the sternum. The progenitors of T-cells are produced in the bone marrow in a process called hematopoiesis. They then migrate to the thymus where they mature and develop their specific antigenicity. Only about 20% of the progenitor T-cells mature. The rest mainly get destroyed by apoptosis.
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Bacteria are the most common example of exponential growth. Select a number
between 2 and 10 to represent the hourly growth rate of a certain bacteria. For
example, selecting the number 8 would mean that the amount of bacteria will be 8
times greater after every hour.
In simple terms, Bacteria can be stated a large group of single-cell microorganisms and they can easily found everywhere which lack nucleus and organelles
Explanation:
The Bacterial growth can be stated as the multiplication of bacteria into two daughter cells and this process is stated as binary fissionIn simple terms, the exponential growth or rate of a bacteria is stated as the generation timeMostly bacteria will grow based on factors like air, temperature, etcFor example, E.coli takes around fifteen to sixteen minutes for growth and the bacteria coliform takes around twelve to twelve four hours depends upon the factorsFrom single cell of bacteria the number becomes, 2, 8, 64, ... and so on.
Explanation:
Bacteria is one of the best examples that show exponential growth.
The equation that shows the exponential growth of bacteria is
N = N₀ X 2ⁿ
If we consider the growth of the bacteria starts from 1 cell then,
N = 1 X 2⁰
N= 1
In 1 hour, the cell number becomes,
N = 1 X 2¹
N = 2
In 2nd hour, the cell number becomes,
N = 2 X 2²
N = 8
In 3rd hour, the cell number becomes,
N = 8 X 2³
N = 64
The growth continues exponentially and then becomes stationary after a certain period of time when enough nutrients are not present.
Thus from single cell of bacteria the number becomes, 2, 8, 64, ... and so on.
What is a landfill? Check all that apply.
Answer:
It is a structure that isolates waste from the surrounding environment.
It is a planned structure that buries trash in the ground.
I really need help someone help me ASAP!!!!!
(the image shown has been resized to fit)
(20 points)
A.
Particle W
B.
Particle X
C.
Particle Y
D.
Particle Z
Answer: particle Y
Explanation:
Answer:
Particle Z
Explanation:
That is a valence electron which determines the reactivity. It is in its outermost shell that is why if you need to show work ^-^
2.
Which chemical equation represents a decomposition reaction?
A. Ba + S + Bas
B. CHgO → Hg + 30,
C. 2FeO + C + 2Fe + CO,
D. Sil, + 2Mg → Si + 2MgI,
Answer:
The correct option is B) CHgO → Hg + 30
Explanation:
A decomposition reaction can be described as a type of reaction in which a single compound or fragment breaks down into two or more than two entities.
The reaction mentioned in option B depicts a decomposition reaction:
CHgO → Hg + 30
In this decomposition reaction, CHgO is the compound which is being broken down into the elements Hg and O.
Red eyes (e) in fruit flies are recessive to black eyes (E). If a fruit fly physically expresses red eyes, what is its genotype?
Answer: The genotype of a fruit fly which physically expresses red eye is (ee)
Explanation: The red eyes trait (e) is recessive to black eyes (E) that is, the black eyes trait (E) is dominant over the red eyes trait (e). Therefore, for the red eyes trait to manifest physically the genotype must appear as a homozygous allele (ee)
In oxidation is needed to create a chemical reaction
Answer:
Explanation:
Oxygen or an oxidizing agent to receive electrons must be present for oxidation to occur in chemical reactions.
Explanation;
Oxidation entails the loss of electrons from these molecules, causing them to become unstable and highly reactive and leading to their eventual reaction with and damage of cell components such as membranes.
-In redox reaction; The ion or molecule that accepts electrons is called the oxidizing agent; by accepting electrons it causes the oxidation of another species. Conversely, the species that donates electrons is called the reducing agent; when the reaction occurs, it reduces the other species.
Answer:
Oxygen
Explanation:
not needed
What percentage of the Earth's water supply is represented by water in soil and air?
The end of life for a group of organisms, usually a species, is called a what?
The end of life for a group of organisms or a species is known as extinction. This usually happens due to changes in environmental conditions or during a mass extinction event. An example of mass extinction is the 'great dying' at the end of the Cretaceous period, which marked the end of the dinosaur age.
Explanation:The end of life for a group of organisms, usually a species, is referred to as extinction. Extinction is a natural part of macroevolution, indicating evolutionary changes above the species level. There are numerous causes of extinction, which often involve alterations in environmental conditions or mass extinction events.
A mass extinction event refers to a sudden, drastic reduction in biodiversity brought about by an extraordinary environmental condition that wipes out the majority of species within a relatively short geological time period. Great examples of mass extinction are the end of the Cretaceous period, often known as the 'great dying', which marked the end of the dinosaur age, and the current high rate of extinction, considered 500-1000 times the normal rate, largely caused by human activities.
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in terms of natural selection, what is the best description of an organism that is fit?
The organism is physically stronger than competing organisms.
The organism is physically stronger than organisms of a different species.
The organism is better able to survive and pass on traits to offspring than competing organisms.
The organism is a member of a population in which every member survives without competing.
Answer:
The correct option is:
The organism is better able to survive and pass on traits to offspring than competing organisms.
Explanation:
Natural selection is an evolution process in which an organism which is able to survive in an environment has higher chance to transfer surviving traits to the offspring than that of competitors'.The surviving species will pass the genes to younger generations and the population of those species will be higher than the species which were not able to survive in the same environment.Answer:
(C) The organism is better able to survive and pass on traits to offspring than competing organisms.
Explanation:
Edge 2021
Which hormones most directly influence the uterus during pregnancy
Estrogens, progesterone, and human Chorionic Gonadotropin (hCG) are the main hormones that influence the uterus during pregnancy. First released by the corpus luteum, these hormones stimulate changes that nourish the embryo and maintain the pregnancy. As the gestation advances, the placenta takes over the secretion of these hormones, which continue to play vital roles in the healthy progression of pregnancy.
Explanation:The hormones that most directly influence the uterus during pregnancy are primarily estrogens, progesterone, and human Chorionic Gonadotropin (hCG). These hormones are firstly secreted by the corpus luteum during the initial weeks of pregnancy, resulting in the generation of decidual cells that nourish the early stage embryo, or blastocyst, before the placenta forms.
As the gestation progresses, the placenta becomes the primary endocrine organ, taking over the role of hormone secretion from the degenerating corpus luteum. Estrogen, progesterone, and hCG secreted by the placenta are responsible for most of the changes experienced during pregnancy.
For instance, estrogen mainly maintains the pregnancy and promotes fetal viability while also stimulating tissue growth in both the mother and fetus. Progesterone, on the other hand, prevents new ovarian follicles from developing and suppresses uterine contractions, protecting the developing fetus.
Lastly, hCG promotes the survival of the corpus luteum, stimulates the male fetal gonads to secrete testosterone necessary for the development of the male reproductive system, and ensures the placenta continues to secrete progesterone crucial to maintaining the pregnancy.
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the terms germ and microbe are often used interchangeably. what comes to mind when you hear the word germ
Answer:
Most times when you think of the word germ you think of bacteria when i truth only a small fraction of bacteria are harmful a larger fraction is the ones that help organism such as for plants their are bacteria the eat nitrogen when the plant cant deal with nitrogen.
Explanation:
I hope this helps you other forms of germs can be virus but that is not the image you tend to think of when you here the word germ you think of a self living organism not a thing thats not even alive.
which event occurs during
interphase?
a. The cell grows.
á Centrioles appear.
c. Spindle fibers begin to form.
do Centromeres divide.
The event that occurs during interphase is: A. The cell grows.
What is interphase?Interphase is a stage in the cell cycle that occurs before cell division. It is a period of growth, preparation, and DNA replication that happens in between cell divisions. Interphase is the longest phase of the cell cycle and can be divided into three distinct stages: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
In the S phase, DNA replication takes place. The cell's genetic material, in the form of chromosomes, is replicated to produce identical copies. Each replicated chromosome consists of two sister chromatids held together by a centromere.
Option A is actually the correct answer.
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10. What does the word competition mean in biology?
A. Two or more organisms looking for the same resource
B. Organisms from different species looking for the same resource
C. Organisms from the same species looking for the same resource
D. Adults outcompeting offspring for resources
Answer:
B
Explanation: For example lions and cheetahs need similar resources so they compete with each other.
The the word competition mean in biology is C. Organisms from the same species looking for the same resource**.
What does the word competition mean in biology?Competition in biology is the interaction between organisms that are competing for the same limited resources. These resources could be food, water, space, or mates. Competition can occur between organisms of the same species or between organisms of different species.
When competition occurs between organisms of the same species, it is called **intraspecific competition**. Intraspecific competition can be very intense, as the organisms are very similar and have the same needs. For example, two male lions competing for the same female lion are engaging in intraspecific competition.
Competition is an important part of the natural world. It helps to regulate populations and ensures that the strongest and most adaptable organisms survive.
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When did the ocean become an important area of study?
A. about 1,000 years ago
B. about 500 years ago
C. about 2,000 years ago
D. about 200 years ago
Give two reasons why both men and women could become victims of violence
Answer:
It could be that the individual (male or female) has a high sense of vulnerability
And
The victim is known to be associating with the wrong peers
Explanation:
The different forms of a gene are called _____. A. nucleotides B. chromosomes C. alleles D. traits
Answer:
Alleles
Explanation:
Nucleotides are units of DNA. Chromosomes hold long stands of DNA. Traits are features expressed because of certain genes.
Answer:C. alleles
Explanation: Alleles are different form of a gene. Example gene Aa controlling tallness consist of two alleles A and a although the two allele are a gene but in different form.
scientific name for alkaliphiles
Answer:
Alkaliphiles are a class of extremophilic microbes capable of survival in alkaline (pH roughly 8.5–11) environments, growing optimally around a pH of 10.
Answer: Alkaliphiles are a class of extremophilic microbes capable of survival in alkaline (pH roughly 8.5–11) environments, growing optimally around a pH of 10
Explanation:
what do x and y chromosomes affect
The extra X and/or Y chromosome can affect physical, developmental, behavioral, and cognitive functioning. Common physical features may include tall stature, lack of secondary pubertal development, small testes (hypogonadism), delayed pubertal development, and breast development (gynecomastia) in late puberty.
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Answer: They effect the gender of the baby
Explanation: if the outcome is xx its a girl it itfs xy its a boy
Cystic fibrosis is a generic disorder
Answer:
If this is a question then yes. It is.
Explanation:
Cystic fibrosis is a inheirited or genetic disorder in the lungs.
Answer:
yes it is
Explanation:
An ecological pyramid is sometimes used to show both the flow of matter and energy in an ecosystem. The pyramid narrows as matter and energy flow from the bottom to the top. Draw a conclusion about what this pyramid tells you about the energy in this ecosystem.
Answer:
An ecological pyramid (also trophic pyramid, Eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bioproductivity at each trophic level in a given ecosystem.
A pyramid of energy shows how much energy is retained in the form of new biomass at each trophic level, while a pyramid of biomass shows how much biomass (the amount of living or organic matter present in an organism) is present in the organisms. There is also a pyramid of numbers representing the number of individual organisms at each trophic level. Pyramids of energy are normally upright, but other pyramids can be inverted or take other shapes.
Ecological pyramids begin with producers on the bottom (such as plants) and proceed through the various trophic levels (such as herbivores that eat plants, then carnivores that eat flesh, then omnivores that eat both plants and flesh, and so on). The highest level is the top of the food chain.
Biomass can be measured by a bomb calorimeter.
Explanation:
Answer:
D) Energy decreases from bottom to top because some is used at each level for life processes.
Explanation:
Describe the three parts of an ATP molecule.
Answer: Atp stands for adenosine triphosphate. Its a molecule made in every cell of your body. It has three phosphates attached to it and the bonds of these phosphates are a large amount of chemical energy. For every single chemical process in your body that requires energy the cdllx of your body will break your bond between one of the phosphates.
Explanation:
Final answer:
ATP consists of three parts: adenine, a nitrogenous base; ribose, a five-carbon sugar; and three phosphate groups that store energy. The high-energy bond between the last two phosphates is broken to release energy for cellular processes.
Explanation:
Adenosine Triphosphate (ATP) is a complex molecule that serves as the primary energy carrier in the cell. The three parts of an ATP molecule include:
Adenine - a nitrogenous base imperative for the structure of ATP.Ribose - a five-carbon sugar that serves as the backbone to which the adenine and phosphate groups are attached.Three phosphate groups - referred to as alpha, beta, and gamma phosphates, these groups store the potential energy that is released during cell metabolism.The bond between the last two phosphate groups, beta and gamma, is known as a high-energy bond that, when broken, releases energy for cellular activities. This process is known as hydrolysis. The energy released is then used in various cellular processes, including muscle contraction and the synthesis of biomolecules.
How many hours are between lunch and dinner at 6:00?
Answer:
That number of hours between lunch and dinner varies between individuals.
If dinner is at 6:00 pm, and lunch is at noon (12:00 pm) then there are 6 hours between lunch and dinner
Explanation:
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Since their time, many new discoveries have been made supporting the theory, including new knowledge of genetics and the chemical process of heritability. But since the biological theory of evolution depends on scientific observations, which scientific finding, if it was ever made, would force scientists to radically change the theory? A. if a very famous scientist decided she did not like the theory B. if modern animal fossils were ever found in a very ancient geologic period C. if an animal's circulatory system was shown to be very complex D. if a very ancient species of animal was found to still be alive today
If modern animal fossils were ever found in a very ancient geologic period, it would have changed the whole evolutionary theories.
Option B.
Explanation:Evolution as an event, is very slow and gradually progressive movement. It took millions of years for the unicellular bacteria to evolve and finally make the modern day humans. But the process isn't a haphazard and the evolution processes are well understood by humans. A scientist can clarify how the cell systems became complex to eukaryotic cells, the tissues began to develop, and then the organs and the organ system. The systems like circulatory system, nervous system, muscles, everything slowly grew to evolve animals into a superior one. This is the theory in present days and this is supported by Fossils and different other proofs.
But if one day, a fossil is found which is actually the fossil of a modern animal in very ancient time, its not collaborative with the theories. Modern day animals are born as a result of huge evolutions and presence of them in very ancient times is impossible. So this finding can wipe out present day theories of evolution.
In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by?
Answer:
polar covalent bonds
Explanation:
In a water molecule, two hydrogen atoms are bonded to a single oxygen atom by covalent bonds, where they share pairs of electrons for stable electron configuration.
Explanation:In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by covalent bonds. This type of bond forms when two atoms share pairs of electrons. In the case of water, each hydrogen atom forms a covalent bond with the oxygen atom, leading to their stable bonding structure within the molecule. This sharing of electrons allows all atoms in the water molecule to have a stable electron configuration.
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Within any large animal population, there is _______ a variety of traits.
And between different animal populations, there is _______ a variety of traits.
A.
never; sometimes
B.
sometimes; sometimes
C.
never; always
D.
always; always
Answer:
D. Always;Always
After you have established a research question, which of the following should you do first?
1. design an experiment
2. put your research question into a null and alternative hypothesis
3. determine the variables you will measure
4. choose a statistical test to use
Answer:
After you have established a research question, which of the following should you do first?
put your research question into a null and alternative hypothesis
Explanation:
It expedient that after research question has been established, one needs to make a null hypothesis and alternate it, this gives a clue of what the researcher intends to find or problem to be solved.
5.1.4 Quiz: Carbon and Nitrogen Cycles
Question 2 of 10
2 Points
What happens to most of the nitrogen in a plant when the plant dies?
O
A. It remains in the dead plant.
B. It moves into the atmosphere.
O
O
C. It goes back into the soil.
D. It is absorbed directly into animals.
Answer:
The correct answer is -It goes back into the soil.
Explanation:
Nitrogen is found in a wide variety in the atmosphere. It can be found in a form of ammonia,nitrate, nitrite, nitrogen dioxide, nitric oxide etc.After the death of a plant or animal body, the organic form of nitrogen is converted to ammonium by the microorganisms and this process is called as ammonification.Enzymes that are required for this conversion are GDH, Gln synthetase etc.Humans and hogs have differences in only 1 out of the 51 amino acids in their insulin proteins. Hogs and guinea pigs have differences in 17 out of the 51 amino acids in their insulin proteins.
What can be inferred from this information?
A.
Hogs and guinea pigs are more closely related to each other than either is to humans.
B.
Hogs are related to humans but not to guinea pigs.
C.
Humans are more closely related to hogs than hogs are to guinea pigs.
D.
Humans are related to guinea pigs but not to hogs.
Humans are more closely related to hogs than hogs are to guinea pigs.
Explanation:
The difference in the amino acid sequence of a protein is used to know the relation between organism i.e. how closely they are related.
It is known that proteins are the result of DNA sequence ie genes of the organism.
The gene or protein is compared between organisms to understand the evolutionary evidence and similarities between them.
The less is the difference the more is the two organisms closely related as in the case of hog and human which have only 1 amino acid difference in their insulin enzyme. While guinea pig is having a difference of 17 amino acids so it is expected to be distantly related.
These relations helps the scientist to resolve the issues of crisis say insulin. They zero out the possibility of extracting the enzyme genes of possible organism and increase the yield.
Answer:
c
Explanation:
Which of the following is a radical?
O
H20
OH
H
Answer:
The correct option is C) OH
Explanation:
In the field of chemistry, radicals can be described as atoms, molecules or ions which have at least one unpaired electron.
The formation of a radical occurs when a single covalent bond breaks so that each of the atoms that had been involved in the formation of the covalent bond can have an unpaired electron. Examples of radicals include OH, NH4+ etc.
Other option, like option B, is not true because a molecule of water does not have any unpaired electrons in its valence shell.
PLZ HELP ME! In the state of Maharashtra in India, borewells are going dry, and in one village, the entire population must depend on how many wells?
A. 1
B. 2
C. 3
D. 4