Answer:
1) The purpose of mitosis is growth and repair of cells
Explanation:
Prophase:
-DNA condenses (supercoiled, chromatids are visible under light microscope);
-Nuclear membrane begins to disintegrate (by the end of prophase it is completely gone)
-Centrioles move to opposite ends of the cell
-Splinde fibers start to form from the centrioles and grow
Metaphase:
-Spindle fibers, departing from both poles, are attached to each centromere, on opposite sides
-The spindle fibers pull the chromosomes back and forth until they align in a plane along the equator of the cell, which is called the equatorial plane
Anaphase:
-The spindle fibers shorten
-The centromeres of sister chromatids split
-Chromatids move apart, pulled by the spindle fibers
-Chromatids become chromosomes
-Half of the chromosomes move to one cell pole, half to the other
Telophase:
-The chromosomes reach the cell pole
-Nuclear membrane reforms
-Spindle fibers break down and disappear
-The chromosomes begin to uncoil, which makes them diffuse and less compact
Cytokinesis:
-The cell membrane pinches inward until the cell divides in two;
-There are two daughter cells with the same structures and number of chromosomes as the parent cell
-Chromosomes decondense
On a plant, stomates are small openings that regulate the passage of air and water vapor to and from the plant. Generally, the stomates open during sunlight and exchange gases with the atmosphere. The stomates of a few specialized desert plants can open only at night. The best explanation for the pattern of stomate opening and closing is that the desert plants are adapted to protect against
(1) harmful insects
(2) dust particles
(3) destructive plant disease
(4) excess water loss
(5) total energy loss
Please help me somebody answer this.
Answer:
4
Explanation:
this is because when the stomata opens during the day it would lose much water to the atmosphere so it tends to open during the night and close during the day
In Gregor Mendel's work with pea plants, he found that when a tall pea plant, with genes TT, was crossed with a short pea plant, with genes tt, that _____ % of the first generation of offspring plants were _____.
Answer:
In Gregor Mendel's work with pea plants, he found that when a tall pea plant, with genes TT, was crossed with a short pea plant, with genes tt, that _100_ % of the first generation of offspring plants were tall pea plant_.
Explanation:
After crossing the two types of plants, Mendel observed that among the F1 there were only tall variants, while the other variant (short) disappeared. Mendel named "dominant" the expressed variant. Mendel then let these new plants auto pollinate and observed the results in the second generation, F2. He saw that the short variant that had previously disappeared, reappeared again. Both tall and short plants were present in the F2. Mendel named "recessive" the second alternative variant.
Mendel explained his results by arguing that discrete factors were responsible for these phenotypes. These factors should have been present in the F1 in pairs. One of them came from one parental plant, and the other factor came from the other plant. These factors then separated again when sex cells were produced, giving two types of gametes, each with only one factor.
Mendel concluded that each plant had a pair of factors -which he named alleles-, and that each factor coded for one trait -tall and short-. He thought that these factors -T and t- separate -segregate- during gamete formation. This conclusion is known as the segregation principle (First Mendels´ Low).
how do the decisons that we make each day influence how efficiently our body operates
Answer:
Our decisions have direct impact on the operations or actions of our body.
Explanation:
The decisions that we make each day greatly influence our body and efficiently our body operates because the activities we do in daily life put pressure on our body system. If our decisions force us to do hard work so it makes our body more stronger and healthier as compared to those decisions which requires no hard work so our body is not strong enough and our body can't operates efficiently.
Transfusion of type AB blood would introduce both A and B ______________ which would be ______________ monosaccharides type
Answer: hello your question is poorly written below is the question
answer:
Tetrasaccharides, Recognized, Triggers, Type B, Type A, Type O, Not recognize, TetrasaccharidesExplanation:
Both A and B Tetrasaccharides which would be Recognized as foreign and Triggers an immune reaction in recipients lacking either the A saccharide Type B or B Type A or both Type O . meanwhile the type AB blood would contain both A and B and would Not recognize those Tetrasaccharides as foreign
What determines the temperature of a layer of the atmosphere?
A. The way thlmayer interacts with the layer below it
B. The average wind speed in the layer
c. The way the layer interacts with solar radiation
D. The altitude of the solar radiation
The answer is C. The way the layer interacts with solar radiation.
Answer: c
Explanation:
Correct just did it
The mutation of a cell for a specific function is called
Explanation:
A gene variant if functionof mutation
Answer:
A gene variant for a specific function
why is meiosis called reduction division?
: Meiosis is sometimes called "reduction division" because it reduces the number of chromosomes to half the normal number so that, when fusion of sperm and egg occurs, baby will have the correct number. Therefore the purpose of meiosis is to produce gametes, the sperm and eggs, with half of the genetic complement of the parent cells.
. Plants prepare their food on their............(leaves\roots)
The toxins responsible for botulism are proteins that inhibit the release of acetylcholine, which in turn can cause muscle paralysis. In extreme cases the paralysis can involve the respiratory muscles, and people can die of respiratory failure. This mechanisms of action indicates that the toxins are
Answer:
Poisonous substance.
Explanation:
This mechanisms of action indicates that the toxins are the poisonous substance which attacks on the respiratory system of the body that leads to the respiratory failure. Acetylcholine is the main neurotransmitter of the parasympathetic nervous system which is the part of the autonomic nervous system that contracts smooth muscles so inhibition of the release of Acetylcholine is the main cause of paralysis.
Which of these is the best definition of sustainable development?
A. Development that makes sure buildings are strong enough to sustain large hurricanes and earthquakes
B. Development that's typical of underdeveloped nations that derive their products directly from nature
C. Development that's supported by public opinion
D. Development that ensures the protection of the environment in the long term
Answer:
option D
Explanation:
is the correct answer
Development which basically ensures the protection of the environment in the long term is sustainable development. The correct option is D.
What is sustainable development?Sustainable development is defined as growth that fulfills the requirements of the moment without jeopardizing future generations' capacity to meet their own needs.
The financial, social, and environmental measurements of sustainable development are examined.
The authors contend that material-intensive conventional productivity recovery is unsustainable in the long term unless environmental and social factors are prioritized equally.
Environmental protection aims to preserve as well as restore a healthy natural environment.
Sustainable development incorporates ecologic, social, and economic goals in order to achieve long-term equitable growth that benefits both the present and the future.
Thus, the correct option is D.
For more details regarding sustainable development, visit:
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The history of life has been punctuated by several mass extinctions. For example, the impact of a meteorite may have wiped out most of the dinosaurs and many forms of marine life at the end of the Cretaceous period. Fossils indicate that plants were less severely affected by this mass extinction. What adaptations may have enabled plants to withstand this disaster better than animals
Answer:
Due to dormancy.
Explanation:
Plants have an advantage in surviving mass extinction because Plant seeds can remain dormant for many years in the soil without damaging and comes out from the soil when the conditions of the external environment become suitable. Plants can remain in dormant condition for a large period of time while on the other hand, animals have no such type of advantage so that's why plants survive mass extinction.
Linda received the flu vaccine this year.
Which of the following statements is true?
Linda's T-cells will produce memory cells against the virus.
Linda's body will produce antigens against the flu virus.
Linda's immune system will produce lifelong immunity against any form of the flu.
Linda's immune system will produce antibodies against the flu virus.
Answer:
Linda's immune system will produce antibodies against the flu virus
Answer:
Linda's immune system will produce antibodies against the flu virus
HOPE THIS HELPS
HAVE A GOOD DAY OR NIGHT
Once the neural plate edges have fused to become a neural tube, the tissues that were at the edges of the plate now form the __________ region the neural tube. Fill in the blank.
Answer: Dorsal.
Explanation:
The neural plate is a region of the dorsal ectoderm that develops into the neural ectoderm. It is a flat structure, with columnar appearing cells, and the formation of the neural ectoderm is the first step in the neurulation process. This region is generated from the thickened mid-dorsal surface opposite the primitive line of the ectoderm. From this epithelial zone the various types of neuronal and glia cells belonging to the nervous system are derived. For the neural plate to be built, it is necessary that the epiblast cells converge towards the midline of the embryonic disc forming a groove of the primitive line, delimiting a longitudinal axis of bilateral symmetry around which the embryonic structures and their organs will be aligned. From this moment on, the embryo will have a rostral (cephalic) and caudal (tail) region as well as a left and right side and a dorsal (back) and ventral (front) surface. From the folding of the neural plate or neurulation, the neural tube and the development of the entire nervous system will be formed.
The neural tube is tubular structure that undergoes modifications and will give rise to a central nervous system structure (encephalon and spinal cord). The neurulation process begins by means of signals sent by the dorsal mesoderm and pharyngeal endoderm to the ectodermal cells located above these germ layers. These signals cause this area of the ectoderm to elongate into a columnar plate of cells. The elongation allows the differentiation of the cells of the future neural plate, with respect to the pre-epidermal cells surrounding the area.
So, the neural tube is formed by invagination from the dorsal region of the ectoderm (neural plate) induced by the notochord while it is forming. This occurs at the beginning of the third week of conception by a process called neurulation.
Hello.
All of the DNA in the nucleus of a cell can potentially be mutated?
True or false?
I will give brainly
Answer: True. Yes it could potentially be mutated.
Explanation:
55:57
Which was not a result of the 1898 discovery of the four blood types and advances made during the two World Wars?
improved blood transfusion safety
effective blood preservation solutions developed
ability to separate different parts of blood for different uses
all blood types made compatible with each other
Answer:
i don't know
Explanation:
i don't know
What is a difference between complete metamorphosis and incomplete metamorphosis?
Two stages of a butterfly's life cyles are described below.
Stage 1: The caterpillar sheds its skin as it grows.
Stage 2: The butterfly breaks out of the chrysalis.
Which statement is true about the stages?
Answer:
stage. 1
Explanation:
stage.1 it is right
Answer:
Stage 1 is the larva stage and Stage 2 is the adult stage.
Explanation:
Using the field of view calculated in Exercise 1 for the high power lens, what is the approximate diameter of each of the cells in the Bacteria Coccus Form slide in Photo 10? Show your calculations.
400x Magnification
0.4 mm field view
Answer:
i thinks
Explanation:
400x
0.4mm
lens
The large number of alveoli in lungs improve gas exchange by ________. increasing the surface area for diffusion decreasing the distance for diffusion changing the diffusion constant increasing the concentration difference
Answer:
Explanation:
The large number of alveoli in lungs improve gas exchange by . increasing the surface area for diffusion
If you were given the power to control the United States government and policy what changes would you make regarding the environment and how would you fund these? You can consider your response to the question and/or include other issues.
Answer:
i would probably fund different jails using taxes. there's absolutely no reason someone who accidently committed tax fraud should be sitting in the same cell as aconvicted murderer. & abd I would make harder consequences for hate crimes. like jail time.
The immunoglobulin light chain does not have a D segment. In humans, there are two different possible light chain proteins, termed kappa and lambda. Assume that there are 35 V segments and 5 J segments in the human kappa light chain region, and there are 30 V segments and 4 J segments in the human lambda light chain region. How many possible light chain genes can be created from these different segments, simply due to combinatorial diversity
Answer:
295
Explanation:
Antibodies (also known as immunoglobulins) are immune system-related proteins that circulate in the bloodstream in order to recognize pathogenic harmful substances (antigens) and neutralize them. An antibody consists of two immunoglobulin heavy chains and two immunoglobulin light chains. There are two types of immunoglobulin light chains: 1-the kappa (κ) light chain, which is encoded by the immunoglobulin κ locus; and 2-the lambda (λ) light chain, which is encoded by the immunoglobulin λ locus. The immunoglobulin light chain is a multidomain protein composed of two domains: 1- the N-terminal variable (V) domain and 2-the C-terminal constant (C) domain. V(D)J recombination is a type of somatic rearrangement process by which T and B cells can assemble different gene segments, which are referred to as variable (V), diversity (D) and joining (J) gene segments. In the question above the number of possible genomic recombination events between immunoglobulin gene segments can be calculated as >> (5 x 35) + (4 x 30) = 295.
all dicots are annuals true or false
Answer: The answer is false
Need answer ASAP! A car runs out of gas and slowly coasts to a stop. This is an example of the following?
O A. short time, small force
B. long time, small force
O c. short time, large force
D. long time, large force
Answer: long time, small force
What is breathing in science
Answer:
Breathing, the action of moving air or water across the surface of a respiratory structure, such as a gill or lung, to facilitate respiration (the exchange of oxygen and carbon dioxide with the environment).
Explanation:
sinanthropus pekinenis was victim of cannibalism
explain how typical cells are adapted to their function
Answer:
Many cells are specialized. They have structure that are adapted to their function. For eg : muscle cells bring parts of the body together. They contain protein fibres that can contract when energy is available, making the cells shorter.
bag of skin surrounding the testes is called
Answer:
[tex]{ \pmb{it \: is \: called \: a \: scrotum}}[/tex]
Answer: boao quy dâufd nha bận iod
Explanation:
In classical conditioning _____ is the unlearned, naturally occurring response to the unconditioned stimulus (US). (Pyscology)
Answer:
unconditioned response
Explanation:
here is the answer..
In terms of the hierarchical scales of biological organization, __1__ are a very large scale, __2__ are a very small scale, and __3__ is between them.
Answer:
ecosystem, and biosphere
organelle and cells
tissues, organs, organ systems, organisms, populations, communities,
Explanation:
In terms of the hierarchical scales of biological organization, ecosystem, and biosphere are a very large scale, organelle and cells are a very small scale, and tissues, organs, organ systems, organisms, populations and communities, are present between them. The biological levels of organization of living things arranged from the simplest to most complex are organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Which of the following is the best definition of climate?
1 . The day to day changes in the atmosphere
2. The average weather over a long period of time and over large areas
3. The state of the atmosphere across the world
Answer:
THE STATE OF THE ATMOSPHERE ACROSS THE WORLD IS THE BEST FROM MY OPINION .
Answer : 1
Explain: The day to day changes in the atmosphere
Salt minerals formed by which method
Answer:
solar, evaporation, and rock mining.
Explanation:
