Answer:
A
Explanation:
Meiosis occurs in two phases. Meiosis I is the reductive phase, while meiosis II is non-reductive. The point at which the cells first become haploid is at the end of meiosis I, after homologous chromosomes separate.
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Through Meiosis, a diploid cell (2n) produces four haploid daughter cells (n).
After DNA replication there are two meiotic phases.
The first one is a reductive phase, in which homologous chromosomes separate. In the second phase, the cell suffers a new, not reductive division.1. In the first phase, Meiosis I:
Prophase I: Chromosomes condensate and become visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one. Metaphase I: Homologous chromosomes randomly align in the equatorial plane. Anaphase I: In this phase occurs the division and independent separation of homologous pairs. Each chromosome migrates to different poles. This separation generates different chromosomal combinations in the daughter cells.Telophase I: Chromosomes of homologous pairs are already in the corresponding poles, and the nuclear membrane forms again in each pole.
Cytokinesis occurs
2. In the second phase, Meiosis II:
Prophase II: Chromosomes condensate again and become visible. Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase. Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole. Telophase II: Once in the poles, the chromosomes become lax again, and the nuclear membrane forms again.Cytokinesis occurs.
To answer this question, focus your attention on Meiosis I. During the anaphase homologous chromosomes separate. After this point, the nuclear membrane forms in the telophase, followed by cytokinesis. The result is two haploid cells.
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The virus best known for causing mononucleosis, which is also suspected of contributing to Hodgkin's disease, is called
A molecule that closely resembles the shape of a substrate for an enzyme would most likely serve as a __________.
Answer:
I think it's Inhibitor :)
where are your adrenal glands located in your body
What is the term that describes the loud, high-pitched sound made with each inhalation that occurs when there is respiratory obstruction in the larynx or trachea
40 Points to answer this question in complete sentences
How has the global climate changed in the last century? What has the greatest impact on the climate where you live? Have humans influenced the climate on Earth? If so, how and what should we do?
Answer:
Over the last century, the average temperature on the surface of the Earth has increased by about 1.0 degrees F. The greatest impact is the droughts that my state is constantly in. I believe that we had a great part in global climate change. How I think that we have is all the air pollution and not taking care of out earth the way we should. How I think that we can fix this is if we start powering our home with more solar. We can also reduce the amount of water that we use.
Explanation:
Can Someone help me with this?? Your help will be very much appreciated ! Its somewhat confusing so Please help if you dont mind ? ❣️I would love someone that could answer this correctly !! Thank you <333!
Answer:
1)Protein is composed of amino acid.
We can identify protein by sequencing amino acids in peptide.
Carbohydrates is primarily avilabke energy source.
2) Proteins and nucleic acids are made up of C H O But carbohydrates and lipids consist of C H O N.
3)Nucleic acid DNA and RNA store and transmit genetic information from one generation to next generation.
Nucleic acid as present in body therefore not considered as essential nutrients.So dietary sources are plant and animal foods like meat fish vegetables etc.
Any Two adaptational Features of catus plant
Answer:
(i) It has long roots that go deep inside the soil for absorbing water.
(ii) Its leaves are in the form of spines to prevent water loss through transpiration.
. Differentiate between analgesic and antibiotic. ann addictive
Answer:
Analgesic - pain reliever, analgesic - a drug designed to relieve pain - analgesia.
Antibiotics - Antibacterial drugs that are widely used as medications to treat infections.
Explanation:
This termines are different at all. The only same thing is that they are both drugs
what is the name of the process in bacteria that involves dna transfer through a cytoplasmic connection known as a pilus?
When a person begins to walk, the neurons in the ______ stimulate the appropriate muscles to produce the pattern and rhythm of arm and leg movements associated with walking.
Answer:
caudate nucleus
Explanation:
When a person begins to walk, the neurons in the caudate nucleus stimulate the appropriate muscles to produce the pattern and rhythm of arm and leg movements associated with walking
Volcanic eruptions have immediate effects such as
AND long term effects such as
O global warming, hot lava
O global warming, lowering temperatures
O lowering temperatures, global warming
O hot lava, causing more hurricanes
Explanation:
Lowering temperatures and global warming
state one reason why the movement of molecules in method C represents active transport.
Answer:
Because molecules are moving from an area of low concentration to an area of higher concentration and thats require energy
Transport proteins in cell membranes maintain the proper balance of _________ (mostly outside the cells) and _________ (mostly inside the cells).
Answer: sodium and potassium
Explanation:
how many linkage groups are present in a female human?
HOW
TO
PROJECT: BUILDING DNA
The structure of DNA resembles a twisted ladder called a double helix. For this project, you will build a DNA molecule by
placing its basic parts together like pieces of a puzzle.
The structure of DNA resembles a twisted ladder because both strands are linked by hydrogen bonds.
What is DNA?Deoxyribonucleic acid (DNA) is a double helix composed of two long chains of nucleotides linked by hydrogen bonds.
In DNA there exist only four different types of nucleotides (i.e., Guanine, Cytosine, Thymine and Adenine).
In conclusion, the structure of DNA resembles a twisted ladder because both strands are linked by hydrogen bonds.
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where are unmyelinated nerve fibers surrounded by schwann cells?
Schwann cells without myelination are seen in the peripheral nervous system (PNS).
Myelinating Schwann cells and non-myelinating Schwann cells are the two different kinds of Schwann cells. One kind of neuroglial cell is the Schwann cell. Nerves are helped and supported by neuroglial cells. Nerve impulses can be sent at speeds of about 270 miles per hour thanks to the ability of Schwann cells to speed up the process.The myelinating Schwann cell coils around nerve axons with large diameters. The myelinating Schwann cell creates the neurilemma, a lipid base membrane, as it loops itself around the nerve fiber. The myelin sheath develops from the neurilemma.However, unlike a hotdog bun that encircles a hotdog, the non-myelinating Schwann cell does not form myelin; instead, it permits thin nerve fibers to rest along, within, and on top of the non-myelinating Schwann cell. Non-myelinated nerves often have slower nerve transmission.Learn more about the Schwann cells with the help of the given link:
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Are mitochondria found in animal cells? Explain.
Answer:
Mitochondria is found in animal cells.
General Formulas and Concepts:
Cellular Respiration
TCA CycleETC/ChemiosmosisExplanation:
The production of ATP is found mainly in the mitochondria. Producing ATP must undergo cellular respiration. All plants and animals go through cellular respiration to provide energy for everyday actions needed by cells. Therefore, both plants and animals have mitochondria.
Topic: AP Biology
In creating recombinant DNA, some restriction enzymes produce ______ ends in both the source DNA and plasmid DNA, and these ends can stick to each other by ______.
Answer: Single-stranded; complementary base pairing
Explanation:
Restriction enzymes are essential components of recombinant DNA technology because they can be extracted from bacterial cells and utilized in the lab to modify DNA fragments, including those that contain genes (genetic engineering).
What recombinant DNA produce by restriction enzymes?An isolated bacterial protein called a restriction enzyme breaks DNA at specific sequence-specific locations to produce DNA fragments with a known sequence at each end.
For several laboratory techniques, such as genetic engineering and recombinant DNA technologies, restriction enzymes are essential.
Therefore, In creating recombinant DNA, some restriction enzymes produce Single-stranded ends in both the source DNA and plasmid DNA, and these ends can stick to each other by complementary base pairing.
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which animal is one of only two mammals that lay eggs?
Explanation:
the echidna is the answer
Answer:
Platypus
Explanation:
what is the name of the provisional head priestess of the asase shrine?
When salt water i added to a plant cell why does the cell membrane srink
If a higher concentration of salt is placed outside of the cell membrane, the water will leave the cell to bond with it. The loss of water from this movement causes plant cells to shrink and wilt.
The comparison between the number of human genes and those of other animal species has led to many conclusions, including that _____.
Answer:
We have a lot of similar genes to those of animal kin.
Explanation:
The genes of humans and animals show more than 50% similarity and conclude the same ancestral origin.
What are genes?The gene can be described as the hereditary unit that results in the make-up of proteins for the functioning of the body.
The genes are hereditary and evolution there results in the change in the genotype and thereby phenotype with mutations.
The genes of humans and animals result in the similarity of more than m 50%. This concludes that there has been the presence of the same ancestral origin for the animal and humans.
The genetic similarity between humans and the animal species results in the conclusion of humans belong to the animal kingdom and have the same ancestral origin.
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♡what is tissue????✨
Tissue is a group of cells that have similar structure and that function together as a unit. A nonliving material, called the intercellular matrix, fills the spaces between the cells. ... There are four main tissue types in the body: epithelial, connective, muscle, and nervous. Each is designed for specific functions.
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In biology, tissue is a Cellular organizational level between cells and a complete organ .
hope it helps you ❤~✨
in classical conditioning, stimulus generalization occurs when an organism responds
Answer: In stimulus generalization, an organism responds to new stimuli that are similar to the original conditioned stimulus. For example, a dog barks when the doorbell rings. He then barks when the oven timer dings because it sounds very similar to the doorbell
True or False: Increases in the width of long bones is a result of bone modeling.
Answer:
TRUE is correct
Explanation: protecting the post.
Answer:
Explanation:
True
The cerebral nuclei are also called the basal nuclei and sometimes are incorrectly called the basal ganglia. Why is this incorrect
It is incorrect to name basal nuclei as basal ganglia because the term 'ganglia' refers to clusters of cell bodies in the peripheral nervous system (PNS). The basal nuclei are a group of subcortical nuclei.
The basal nuclei are a group of subcortical nuclei located deep in the cerebral hemisphere and midbrain.
The basal nuclei can be defined as a region of the brain that is involved in muscle coordination and movement.
The term ganglia make reference to a group of neurons outside of the central nervous system in the peripheral nervous system (PNS).
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Which is the BEST statement about joint flexibility? A. It is constant for any joint type. B. It is constant within a family. C. It is consistent between an individual's joints. D. It varies from joint to joint. Please select the best answer from the choices provided. A B C D.
Which is the BEST statement about joint flexibility?
Answer : D
Explanation : It varies from joint to joint.
Hope this helps you!
The amount of flexibility can vary greatly from joint to joint and is affected by various factors such as joint structure, muscle strength and elasticity, age, and physical activity level. Hence option D is correct.
What is joint flexibility?Joint flexibility refers to the range of motion (ROM) of a joint or a group of joints. It is the ability of a joint to move through its full range of motion without causing any pain or discomfort.
Joint flexibility is an important aspect of physical fitness and is essential for performing daily activities and participating in sports and exercise.
Joint flexibility is determined by several factors, including the anatomy of the joint, the length and elasticity of the muscles surrounding the joint, and the presence of any injuries or medical conditions affecting the joint.
Some joints, such as the shoulder joint, are naturally more flexible than others, like the knee joint.
Flexibility can vary between individuals and between different joints in the same individual. For example, someone may have very flexible hip joints but limited flexibility in their shoulder joints.
Similarly, an individual's joint flexibility can also be influenced by age, gender, and activity level.
Hence option D, It varies from joint to joint. is correct.
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What is the condition in a male in which the prostate gland enlarges and compresses the urethra, causing bladder, kidney, and urinary problems?
Answer:
b. Prostatic hyperplasia
Explanation:is correct
movement of xylem sap from roots to leaves __________.
Answer:
trandpiration
Explanation:
(i think)
Which of the following describes how most farms in the United States are run?
Answer :Family farms (where the majority of the business is owned by the operator and individuals related to the operator) of various types together accounted for nearly 98 percent of U.S. farms in 2019. Small family farms (less than $350,000 in GCFI) accounted for 90 percent of all U.S. farms.