T/F - In the first division of meiosis, the number of chromosomes is cut in quarters.
Answers
There are 46 chromosomes in each human cell. i.e., there are 23 pairs of these. In meiosis I, these couples split and disintegrate. As a result, each of the two daughter cells produced during the initial meiotic division has 23 chromosomes instead of the full amount of 48.
A human cell has 46 chromosomes, or 92 chromatids, at the start of meiosis I (the same number as during mitosis). The following phases are experienced during meiosis I: phase one In certain aspects, prophase I resembles prophase in mitosis. Two cellular divisions make up the meiotic process. Because gametes (sperm, eggs), which are diploid (2N) individuals, have one-half of all chromosomes, meiosis is a necessary aspect of the sexual process.
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Related Questions
What type of hormones use second messengers in a cascade of reactions that trigger a cell response?.
Answers
The hormones that use second messengers to trigger a cell response are glucagon, calcitonin and thyroid-stimulating hormone which achieve the result through cAMP.
Glucagon takes part in levels regulating the levels of blood glucose .
Calcitonin helps in construction of bones and regulation of blood calcium levels.
Thyroid-stimulating hormones releases T3 and T4 from the thyroid gland .
There are three types of second messengers namely;
calcium ions cyclic nucleotides that include cAMP and cGMP inositol trisphosphate and diacylglycerol.The above are molecules transfer signals that are received at the receptors on the surface of the cell.
The cell response is triggered by the cyclic AMP which is activated by the G-proteins.
The cell responses to hormones involve; protein and enzyme production.
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Human-made, industrial chemicals are thought to contribute to approximately ________ percent of all cancers.
Group of answer choices
A. 10
B. 50
C. 100
D. 1
E. 25
Answers
Approximately 25% of all cancers are thought to be caused by human-made, industrial chemicals. The correct answer is option E.
Human-made, industrial chemicals are ubiquitous in modern society, with many being used in a variety of industrial processes. These chemicals can be released into the environment through air, water, or soil pollution, and can be inhaled or ingested by people. Many of these chemicals have been found to be carcinogenic, meaning they can cause mutations in DNA that lead to the development of cancer.
Some examples of carcinogenic chemicals include benzene, asbestos, and vinyl chloride. While not all cancers are caused by exposure to these chemicals, they are thought to contribute to approximately 25% of all cancers. This highlights the importance of regulating and controlling the use and release of industrial chemicals to minimize their impact on human health.
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What are the different roles of consumers in the ecosystem?
Answers
Answer:
In an ecosystem, consumers are responsible for controlling overpopulation of organisms and vegetation by eating them and for supplying energy to other organisms
Explanation:
For each of the following, 1. identify whether is is nonexcludable, nonrival, neither, or both and briefly explain your answer. and 2. determine which one or more of the following (a, b, c, d) would suffer from the free rider problem. Make sure to fully explain your answers:
a. The Great Smoky Mountains National Park (covers over 800 square miles, has dozens of access points for hiking trails located along public roads and highways).
b. a playground at a local park, such as Luetta Moore Park in Statesboro, GA (if you aren't familiar with Statesboro - it's an open playground in a residential area, there's a fence around part of it, but there's no gate/fence doesn't close)
c. National defense
d. A subway train
Answers
a. The Great Smoky Mountains National Park: Nonexcludable and rivalrous. Free rider problem likely.
b. Luetta Moore Park playground: Nonexcludable. No free rider problem.
c. National defense: Nonexcludable and nonrivalrous. Free rider problem exists.
d. Subway train: Nonexcludable. Free rider problem possible during peak hours.
a. The Great Smoky Mountains National Park: It is nonexcludable because it is difficult to prevent individuals from accessing the park. However, it is rivalrous as the park's resources, such as campsites or parking spaces, can be depleted. Both nonexcludability and rivalry suggest that the park is both nonexcludable and rivalrous. The free rider problem may occur since people can enjoy the benefits of the park without paying for its maintenance or preservation.
b. Playground at Luetta Moore Park: The playground is nonexcludable since it is difficult to prevent people from using it. However, it is nonrival as one person's use does not diminish the usability of the playground for others. Therefore, it is only nonexcludable. The free rider problem may not apply here since the use of the playground does not impose costs on others.
c. National defense: National defense is both nonexcludable and nonrival. It is nonexcludable because it is challenging to exclude individuals from benefiting from defense. It is nonrival because the defense provided to one person does not diminish the defense available to others. Both characteristics make national defense both nonexcludable and nonrival. The free rider problem is prevalent in national defense since individuals can benefit from defense without incurring the costs associated with it.
d. Subway train: A subway train is nonexcludable since it is difficult to prevent individuals from using it. However, it can be rivalrous during peak hours when overcrowding may limit the available space. Therefore, a subway train is only nonexcludable. The free rider problem may not be significant here as long as there are no capacity constraints or overcrowding issues.
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two bacterial genes are transduced simultaneously. what does this suggest about the location of the two genes relative to each other?
Answers
If two bacterial genes are transduced simultaneously, it suggests that the genes are located close to each other on the same region of the bacterial genome.
Bacterial transduction is a process in which bacterial genes are transferred from one bacterium to another by a bacteriophage, a type of virus that infects bacteria. During transduction, the bacteriophage packages bacterial DNA into its viral capsid, and when it infects another bacterium, it transfers the packaged DNA.
If two bacterial genes are transduced simultaneously, it indicates that both genes were packaged together within the same viral capsid and transferred to the recipient bacterium. This suggests that the two genes are located close to each other on the bacterial genome.
The physical proximity of genes on the bacterial genome determines their likelihood of being transduced together. Bacterial genes that are located near each other are more likely to be packaged together by the bacteriophage and subsequently transferred in a single transduction event.
In conclusion, the simultaneous transduction of two bacterial genes suggests that these genes are closely located on the same region of the bacterial genome. This phenomenon provides insights into the genetic organization and physical proximity of genes within the bacterial chromosome.
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Identify the plant phylum based on the description.
1. A tree that can be found in the mountains and produces seeds in cones is a type of
2. A tree that produces blossoms that can be fertilized and develop into fruit is a type of
3. This low-lying plant that requires damp surfaces and does not have a system to transport water is a
Every answer has an answer as one of these: Moss, Fern, Conifer, or Flowering Plant
Answers
The answers to these questions are:
A tree that can be found in the mountains and produces seeds in cones is a type of conifer. A tree that produces blossoms that can be fertilized and develop into fruit is a type of flowering plant.This low-lying plant that requires damp surfaces and does not have a system to transport water is a moss.What is a phylum in biology?In biology the term phylum is used to refer to the groups of related things that are known to either be plants or animals that have the same class and also belong to the same kingdom.
The conifers are the plants that would bear fruits that may appear as cones. They are evergreen and they have a straight and tall tree trunk.
The flowering plants are the plants that would have to bear flowers before they would then turn around to become fruit. An example is an orange tree.
Hence we can say that
A tree that can be found in the mountains and produces seeds in cones is a type of conifer. A tree that produces blossoms that can be fertilized and develop into fruit is a type of flowering plant.This low-lying plant that requires damp surfaces and does not have a system to transport water is a moss.Read more on phylum here: https://brainly.com/question/24239568
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The offspring of crosses between parents with different contrasting characteristics are called
One example is cross between
and
to reproduce a mule
Answers
Answer:
interespecific hybridization
Explanation:
A (____) is a statement saying that what is presented is true.
Answers
Answer:
A ‘receipt’ is a statement saying that what is presented is true
Explanation:
Hope this helps!（づ￣3￣）づ╭❤～
answer: a receipt is a statement saying that what is presented is true
For each sequence of DNA is shown. Write the complementary RNA sequence underneath the letters, then use the codon chart to determine the amino acid sequence. DNA: TTC AAT GGT CTA GGG
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Com RNA: AAC UUA CCA GAU CCC
Amino Acid: (ASN) (LEU) (PRO) (ASP) (PRO)
Will mark brainliest
Answers
Answer:
Although water is a renewable resource, the amount of fresh water available is limited. Most of the Earth's water is frozen and unavailable for human use.
If you see signs of life such a holes in trees, tracks, and nests, you may estimate the population size using which method?
Answers
Answer:
INDIRECT METHODS
Explanation:
To estimate population density there are two possible methods: Direct methods and indirect methods.
Abundance indexes are the parameters related to density, and they reflect changes that might happen in the target population density. They are commonly used to compare population sizes, for instance, the abundance of an insect species during the winter and the summer. These indexes are easy to get, so it is possible to make many estimations and make statistical analyses to detect differences.
There are two types of abundance indexes:
The ones based on direct observation and/or capture → DIRECT METHODThe ones based on traces and frequencies → INDIRECT METHODINDIRECT METHODS:
When talking about traces, we are referring to any mark or evidence left by animals, such as footprints, holes, feces, sediments, hair, marks, pathways, nests, shelters, dead bodies, food leftovers, songs, noises, among many others. Traces are directly related to population abundance.
The advantages over the indexes that use capture and observation are that traces are not influenced by detectability, they are much easier to use, cheaper, and they turn to be significant with less visible species.
The paths are useful, but they last for a long time in the habitat, so they do not entirely reflect the recent presence of the animal in a specific moment. However, on the paths, there can be other traces such as footprints, hair, and others that are easier to identify and which reflect a recent pass. These can be used to determine abundance.
In shy species, the alternative to evaluate abundance is to constate their presence in a sampling unit, this is, their frequency. Frequency can be used as an abundance index and, under certain conditions, might be statistically tested to evaluate abundance differences.
What are enzymes?
please help
Answers
Answer:
.
Explanation:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products
Answer:
enzymes are proteins
Explanation:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules that enzymes may act on are called substrates, and the enzyme converts the substrates into different molecules known as products.
Name and describe the 3 concentric coats of the eyeball.
Answers
HAVE A NICE DAY!
if something has a high kinetic energy, what would the temperature and
motion of molecules most likely be?
A. high temperature, slow motion of molecules
B. low temperature, fast motion of molecules
C. high temperature, fast motion of molecules
D. low temperature , slow motion of molecules
Answers
4. What does alternation of generation mean?
A. a plant has sexual plants only
B. a plant has both asexual and sexual plants
C. a plant has asexual plants only
D.a plant has characteristics skip a generation
Answers
What is the main disadvantage of overdraft protection?
A. Banks usually charge a fee when it is used.
B. Banks take several days to process the transaction.
C. It keeps a check from being returned due to insufficient funds.
O D. It requires customers to maintain a positive account balance.
Answers
Answer:A. Banks usually charge a fee when it is used.
Explanation:
Answer: A. Banks usually charge a fee when it is used.
Explanation:
Bacterial _____ are at work in the slimy feel of an underwater rock, ear infections, and dental plaque. View Available Hint(s)for Part A endospores reproductive behaviors biofilms cell walls
Answers
Answer: biofilm
Explanation:
A solid exerts a force of 500 N. Calculate the pressure exerted to the surface
where area of contact is 2000 cm2
Answers
Answer:
2500 pa
btw this is physics ;)
What fundamental element is found in all organic compounds?
Answers
Answer:
The element would be Carbon.
Explanation:
The fundamental element would be Carbon, because it has the potential to catenate and form different organic compounds.
hey ppl hope you had a good day, anyways for the love of GOD please don’t put a random answer anywaysssss
Which statement explains one reason why unconformities occur?
Rocks along a fault break and move.
Igneous rock forms at Earth’s surface.
No sediment is deposited over a long time.
Igneous rock forms between sedimentary layers.
Answers
Answer:
its when No sediment is deposited over a long time
Explanation:
erosion wears away rocks ,or rock deposits never form
hope this helps
What happens when two parents with different traits have offspring why
Answers
Answer:
The answer is that the child will most likely look like half of one of the parent and the other half of the parent, like 50/50.
Explanation:
- The reason for this is each parent will pass only half of their gene to the child and the other half will either be from one of the parents or random (such as from their grandparents, parent's siblings, etc).
- However, sometimes other things can occur. For example, the child can look completely like one of their parents because that parent's genes are dominant.
For example, if you have parents, one with brown eyes, brown hair and the other one have blue eyes and blonde hair. There is a higher chance the child can come out looking like the parent with brown eyes and brown hair. The reason for this is blue eyes and blonde hair are recessive traits.
A substance that yields an anlon plus a hydrogen lon is a(n).
salt
base
acid
Answers
coevolution occurs when _____ drives the evolution of two species that have repeated interactions. each species in a coevolutionary relationship applies _____ pressure on the other, which affects each other's fitness. the interactions that drive coevolution _____ for each species. for example, coevolution occurs between predators and prey when a defensive adaptation in the prey spurs _____ in the predator. coevolution also occurs with _____ where both parties receive increasing fitness benefits, as traits for each are exaggerated.
Answers
Coevolution occurs when repeated interactions between two species drive their evolution. Each species in a coevolutionary relationship applies selective pressure on the other, which affects each other's fitness.
What is Coevolution?
Coevolution occurs when natural selection drives the evolution of two species that have repeated interactions. Each species in a coevolutionary relationship applies selective pressure on the other, which affects each other's fitness. The interactions that drive coevolution vary for each species. For example, coevolution occurs between predators and prey when a defensive adaptation in the prey spurs adaptation in the predator. Coevolution also occurs with mutualism, where both parties receive increasing fitness benefits, as traits for each are exaggerated.
The interactions that drive coevolution are unique for each species. For example, coevolution occurs between predators and prey when a defensive adaptation in the prey spurs adaptation in the predator. Coevolution also occurs with mutualistic relationships where both parties receive increasing fitness benefits, as traits for each are exaggerated.
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Why is it important to protect networks of ecosystems and habitats? Provide an example of a species in Alberta that would benefit from such protection and state why
Answers
Answer:
To maintain stability.
Explanation:
It is important to protect networks of ecosystems and habitats in order to get healthy and stable environment because the environment depends on ecosystems and habitats. If there is no ecosystem or habitat is destroyed then the whole ecosystem will greatly damaged that leads to the extinction of many animals that maintain stability in the environment. Swift fox (Vulpes velox) and Bison (Bison bison athabascae) are the two species that can be protected by protecting habitat and ecosystem.
What is caused by the tilt of earths rotational axis
Answers
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere.
Answer:
What caused earth to tilt?
Explanation:
Long, long ago, when Earth was young, it is thought that something big hit Earth and knocked it off-kilter. So instead of rotating with its axis straight up and down, it leans over a bit. By the way, that big thing that hit Earth is called Theia.
1. What is the function of the cell membrane? ___________________________________________
2. Explain how the cell membrane maintains homeostasis. ___________________________________
__________________________________________________________________________________
Answers
Answer:
Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.
One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Explanation: I hope this helps
An event in Metaphase I of Meiosis I in which chromosomes are sorted randomly, thus, adding to the genetic variations is best described as
Answers
The event in Metaphase I of Meiosis I in which chromosomes are sorted randomly, thus, adding to the genetic variations is known as independent assortment.
What is meiosis?Meiosis is the procedure of cell division that happens in the sex cells of all sexually reproducing organisms. In animals, meiosis occurs in the cells that are responsible for producing eggs and sperm, while in plants and fungi, it occurs in specialized cells. Meiosis is a unique process that produces cells with half the number of chromosomes as the original cell. This is significant since it ensures that the resulting offspring get genetic information from both parents.
What occurs during meiosis?Meiosis is a multi-step process that occurs in two stages. The first stage is referred to as meiosis I, and the second stage is referred to as meiosis II. In each stage, the cell goes through several steps that lead to the separation of chromosomes into daughter cells. The major difference between mitosis and meiosis is that in meiosis, the process occurs twice. In meiosis I, the cell divides once, resulting in two cells with half the number of chromosomes. These cells then go through a second division, known as meiosis II, which is similar to mitosis and results in four daughter cells.
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How does capillary distention resulting from high vessel compliance affect resistance and blood flow?
Answers
The effects of capillary distention resulting from high vessel compliance on resistance and blood flow can depend on several factors such as the
Degree of distension, The location of the capillaries, The overall health of the cardiovascular system.What effect Capillary distention resulting from high vessel compliance?Capillary distention resulting from high vessel compliance can affect resistance and blood flow in several ways:
Increased Compliance: High vessel compliance leads to an increase in the total cross-sectional area of capillaries, which results in a decrease in resistance to blood flow. This decreased resistance can increase blood flow through the capillaries.
Increased Distension: High vessel compliance also leads to increased distension of the capillaries, which can increase the permeability of the capillary walls. This increased permeability can lead to an increased exchange of fluids and nutrients between the blood and surrounding tissues.
Decreased Perfusion Pressure: Capillary distension can also result in a decrease in perfusion pressure, which is the pressure gradient that drives blood flow through the capillaries. This decrease in perfusion pressure can decrease blood flow through the capillaries.
Overall, the effects of capillary distention resulting from high vessel compliance on resistance and blood flow are complex and can depend on several factors such as the degree of distension, the location of the capillaries, and the overall health of the cardiovascular system.
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Hello pls help me to omplete the diagram of the autotrophic cell below.
Answers
In order to complete the diagram of the autotrophic cell below, the correct terms required are:
Carbon dioxide + Water + sunlight (Photosynthesis) ---> Sugar + Oxygen
Oxygen + sugar (Respiration) ---> Water + Carbon dioxide + ATP
What are respiration and photosynthesis?The primary goal of photosynthesis is to use solar radiation to transform carbon dioxide and water into nutrient-rich chemical energy.
The process by which sugar is broken down in the presence of oxygen in the mitochondria of organisms (animals and plants) to release energy in the form of ATP is known as cellular respiration.
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which of these provided information about animal adaptations to climate change?
a. fossils
b. ice cores
c. tree rings
d. sea-floor sediment
Answers
Answer: floor
Explanation:
Fossils are structures which provided information about animal adaptations
to climate change.
Fossils refers to remains of living organisms which have been replaced in the form of rock particles due to its presence in the soil for a long period of time.
The fossils contain an understanding of the structures and characteristics
the animals had which is then compared to its present structures. This helps
to explain how the animals adapted to climate change through changes in
the structure, shape of parts of the body.
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