Answer:
C. 23
Explanation:
In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).
What type or piece of material culture do you think gives the most information about your society? Why?
Which of the following is the BEST description of osmosis?
A.) as active transport
B.) as requiring a transport protein
C.) as an example of facilitated diffusion
D.) as diffusion of water through a selectively permeable membrane
Answer:
D
Explanation:
Osmosis is the diffusion of water through a selectively permeable membrane.
Which type of molecule transfers information from the nucleus to the cytoplasm in the eukaryotic cell
Answer:
The RNA molecule transfers information from the nucleus to the cytoplasm in the eukaryotic cell through transcription and translation.
Explanation:
The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.
what is the electron transport chain
Answer:
The electron transport chain is a cluster of proteins that transfer electrons through a membrane within mitochondria to form a gradient of protons that drives the creation of adenosine triphosphate (ATP).
Explanation:
Brainliest Please!
what is true of a fossil that is classified as a transitional form?
Given our understanding of the situation, we can confirm that a fossil classified as a transitional form, will show characteristics both of its ancestors and of the descendants that derived from it.
Transitional fossils are just that, fossilized remains of a transitional phase of evolution. What this means is that as species evolve, there will always be a point in time where a species is at a halfway point in between the species from which it comes, and the species that it will become.
These fossils, due to being a halfway point, will have characteristics that belong to their ancestors, but also characteristics that belong to their descendants, which is only logical considering that evolution is a process that spans many generations, not something instant.
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When does renal genesis usually develop?
*it's b. despite the test having a typo
Answer:
b. In the womb, when the fetus is about 5-12 weeks old
Explanation:is correct. post protected
describe the negative impacts to an ecosystem of large-scale monocultures of crop
plants and of intensive livestock production
Answer:
CHECK THIS LINK YOUR QUESTION WILL BE ANSWERED.
https://www.goconqr.com/mindmap/4978927/negative-impacts-on-an-ecosystem-of-large-scale-monocultures-of-crop-plants
Explanation:
Which molecule binds NMDA receptors and prevents the flow of ions at resting and hyperpolarized membrane potentials
Answer:
it is in the cell
Explanation:
what is the most common type of laboratory assay that is widely used to assess thyroid hormone concentration
how do you collect maple leaves in animal crossing
Answer:
Explanation:
Similarly to how Cherry Blossom Petals work during the Spring, you can get Maple Leaves by searching for a large orange leaf falling from the sky on your island during this limited period in the Autumn. It's random when and where these leaves will fall on your island, so always be on the look out for one to appear!
Define negative feedback in biology
Answer:
A negative feedback loop occurs in biology when the product of a reaction leads to a decrease in that reaction. In this way, a negative feedback loop brings a system closer to a target of stability or homeostasis
Explanation:
Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances
mendel’s law of segregation states that the two alleles for each gene separate during gamete formation. during which stage of meiosis do the alleles separate?
The stage of meiosis at which the alleles separate is anaphase. The correct option is B.
What is meiosis?Meiosis is a type of cell division of germ cells that produces gametes such as sperm or egg cells in reproducing organisms through gametes.
It entails two rounds of division, resulting in four cells with only one copy of each chromosome.
Meiosis 1 separates a pair of homologous chromosomes and converts a diploid cell to a haploid cell. It is divided into four stages: prophase, metaphase, anaphase, and telophase.
The homologues are pulled apart and moved to opposite ends of the cell during anaphase I.
The sister chromatids of each chromosome, on the other hand, remain attached to one another and do not separate. Finally, in telophase I, the chromosomes arrive at the cell's opposite poles.
Thus, the correct option is B.
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Your question seems incomplete, the missing options are:
Metaphase.Anaphase.Prophase.Embryo formation.Name three components of the cell membrane and explain how each contributes the semipermeable nature of the membrane.
The principal components of the plasma membrane are lipids ( phospholipids and cholesterol), proteins, and carbohydrates. The plasma membrane protects intracellular components from the extracellular environment. The plasma membrane mediates cellular processes by regulating the materials that enter and exit the cell.
A student is conducting an experiment with biochemical reactions and notices that at high temperatures, the reaction rate decreases significantly.
Which statement best explains the decrease in reaction rate?
The bonds of the substrate were breaking.
The enzyme bonded with the substrate.
The enzyme denatured and changed shape.
The activation energy was increasing.
Answer:
The enzyme denatured and changed shape
Explanation:
Enzymes are proteins, which can only function properly within a certain range of temperatures- when things get too hot, proteins undergo a structural change and are considered to be 'denatured'. This means that enzymes will not be able to function properly under those high temperatures, because the substrate bonding site would no longer be the right shape for said substrate.
The statement best explains the decrease in reaction rate is the enzyme denatured and changed shape. Thus option 3 is correct.
What are enzymes?Enzymes are defined as a material that functions as a catalyst in living things, controlling the pace at which chemical processes take place without changing the substance itself.
There are six types of enzymes.
HydrolysesOxidoreductaseLyasesTransferaseLigasesIsomeraseThe functions of enzymes are:
In human bodies, enzymes facilitate metabolic reactions. From breathing to digestion, they support.Health issues might result from having a too amount or too little of a certain enzyme. To help their bodies function as they should, certain persons with chronic diseases may need to take enzyme supplements.Thus, the statement best explains the decrease in reaction rate is the enzyme denatured and changed shape. Thus option 3 is correct.
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Which of the following is NOT a muscle of the abdominal wall?
Answer:
d. Erector spinae
Explanation: is correct
What are MAD (mitotic arrest deficient) proteins and when are they important in the cell cycle?
Answer:
The mitotic arrest deficient protein MAD2B (MAD2L2) is a member of a MAD family of proteins and shows 48% similarity to MAD2 (MAD2L1) [1], [2]. Both MAD2 and MAD2B can bind to the anaphase promoting complex or cyclosome (APC/C), which is a downstream target of the mitotic spindle checkpoint.MAD (mitotic arrest deficient) are proteins related to spindle cell cycle checkpoint and it is important since they prevent the segregation of sister chromatids until all have bound to the spindle.
The cell cycle ensures the duplication of the genome and its distribution in daughter cells by passing through a coordinated and regulated sequence of events.
A series of checkpoints guarantee the orderly progression of the phases of cell division and the correct distribution of the duplicated genetic material in the daughter cells.
The checkpoints during mitosis are:
At the end of stage G1 and before S.Before anaphase in mitosis.DNA damage checkpoints in G1, S or G2.The checkpoint before anaphase in mitosis guarantees the separation of chromosomes, and operates by activating the Mad2 protein that prevents the degradation of segurin, until the conditions are appropriate.
That is, the Mad2 protein prevents the segregation of sister chromatids until they have all bound to the spindle.
Therefore, we can conclude that MAD (mitotic arrest deficient) are proteins related to spindle cell cycle checkpoint and it is important since they prevent the segregation of sister chromatids until all have bound to the spindle.
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what type of ions carry the impulse across the synapse from one neuron to the next ?
It's the sodium ion.
When a neural impulse is fired in both neurons, it is always cause by an excited electron in one neuron moving to the other neuron to destabilize the balance of ions trying to keep them at equilibrium. This action either depolarizes or hyper-polarizes the membrane. If it does, then sodium ions--the key deficient ones--can flow into that region of low charge and maintain that state of low charge, keeping the cell membrane stable.
once the food is swallowed, it passes throught the what
Answer:
esophagus
Explanation:
Once food is swallowed, it passes through the esophagus into the stomach
If I had a section of DNA that contains 350 nucleotides and the A's and Ts made up 200 of
those nucleotides, how many As
Gs
Cs
and Ts
do I have?(.5 points each response)
Answer:
100 A
100 T
75 C
75 G
Explanation:
there will be an equal amount of thymine and adenine since they bind together so, 200/2 = 100 each
now there is 150 nucleotides left
guanine binds to cytosine so they also have an equal amount, so 150/2=75
Answer:
As = 100
Ts = 100
Gs = 75
Cs = 75
Hope you could get an idea from here.
Doubt clarification - use comment section.
what is the most dangerous animal in the world 2021
Answer:
mosquitos ...........
the auditory ossicles transmit vibrations from the
Answer:
tympanic membrane across the middle ear.
Explanation:
The tympanic membrane across the middle ear to the oval window of the inner ear.
in what part of the given pathway is norepinephrine secreted?
Answer:
From the varicosities of the postganglionic fiberSource: Mastering A&P #10: The Sympathetic and Parasympathetic System - QuizletHow many rounds of mitosis produce 64 daughter cells?(1 point)
4
2
6
8
The correct answer is 6 rounds.
Hope this helps!
Answer:
6
Explanation:
What are 2 ways PCR is used in everyday life?
Answer:
including genotyping, cloning, mutation detection, sequencing, microarrays, forensics, and paternity testing. I hope this helps! Explanation:
Aupporting cells of the nervous system are collectively called:
Supporting cells of the nervous system are collectively called neuroglia.
Answer:
They are called neuroglia or glial cells.
look at the picture below. what word describes what is happening to the nutrients and water in the biome?
Given what we know about the water cycle we can confirm that the process that happening in the biome is the process of condensation
Although the water cycle can be divided and subdivided into various processes, we can simplify it into four simple steps:
EvaporationCondensationPrecipitation CollectionThe one saw in the biome and one of the most essential parts of the cycle is condensation. It is the collection of water molecules into a single group that, when dense enough, fall back onto the earth as rainfall. In nature these take the form of clouds, meanwhile, in the biome, they appear as water on the sides of the container.
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Answer:
recyled
Explanation:
The Mississippi river carries sediments into the Gulf of Mexico. What do you think will happen to the sediments after a few million years?.
Answer:
Explanation:
The Mississippi River carries tons of tiny rock fragments called sediments into the Gulf of Mexico. What do you think will happen to these sediments after a few million years? Gizmo Warm-up Over millions of years, rocks are broken down and transformed into other rocks. The Mississippi river carries sediments into the Gulf of Mexico. What do you think will happen to the sediments after. The Mississippi river carries sediments into the Gulf of Mexico. What do you think will happen to the sediments after a few million years?
. Tay-Sachs disease is a human genetic condition where cells build up with large, complex, and undigested lipids. Which organelle must be malfunctioning (not working) in this condition
Answer:
lysosomes
Explanation:
missing lysosomal enzyme
what happened to the molecules when you moved the slider to 0°c ?
Answer:
: Liquid water molecules move more and more slowly until they begin to stick together to form an ice crystal.
Explanation:
A frameshift mutation that results in the insertion of three nucleotides is often less deleterious than a mutation that results in the insertion of one nucleotide. Why?