Plsss help I will give brainlest Section 1 - Question 19
Diploid plants have two sets of chromosomes. Polyploid plants have more than two sets of chromosomes, are often targer, and have more desirable characteristics. To create polyploid plants, plant breeders can
treat diploid plants with a chemical that prevents the separation of sister chromatids during mitosis. Resulting cells that have any partial chromosome sets, even if in addition to one or more complete chromosome
sets typically do not survive this process
It a diploid plant ce treated with such a chemical goes through a single round of mitosis, what is the MOST LIKELY genetic composition of the resulting cells that survive?
А
These cells will be haploid, each having one complete set of chromosomes.
B
These cells will be triploid, each having three complete sets of chromosomes.
С
These cells will be tetraploid, each having four complete sets of chromosomes
These cells will be octaploid, each having eight complete sets of chromosomes.
Answers
To produce a tetraploid plant, the alkaloid colchicine is applied to the terminal bud of a branch. All the cells in the developing branch will be tetraploid (4n) with four sets of chromosomes. This includes cells of the stem, leaves, flowers and fruit. Gametes (egg and sperm) produced by a flower on this tetraploid branch will be diploid (2n) with two sets of chromosomes. A flower on the normal diploid (2n) branch will produce haploid (n) gametes containing one set of chromosomes.
Stages of mitosis in the formation of tetraploid cells. The original mother cell is diploid (2n). During anaphase the chromatids separate and move to opposite ends of the cell. Colchicine causes the dissolution (depolymerization) of protein microtubules which make up the mitotic spindle in dividing cells. This leaves the cell with twice as many single chromosomes (four sets rather than two). When this cell divides, each of the two daughter cells will have fours sets of chromosomes, a total of eight chomosomes per cell. [Note: Spindle poisons such as colchicine are used to prevent tumor cells from dividing in certain chemotherapy treatments.]
The botanical term parthenocarpy refers to the development of the ovary of a flower into a fruit without fertilization. [The biological term parthenogenesis refers to the development of an egg without fertilization.] Fruits that develop parthenocarpically are typically seedless. Some seedless fruits come from sterile triploid plants, with three sets of chromosomes rather than two. The triploid seeds are obtained by crossing a fertile tetraploid (4n) plant with a diploid (2n) plant. When you buy seedless watermelon seeds, you get two kinds of seeds, one for the fertile diploid plant and one for the sterile triploid. The triploid seeds are larger, and both types of seeds are planted in the same vicinity. Male flowers of the diploid plant provide the pollen which pollinates (but does not fertilize) the sterile triploid plant. The act of pollination induces fruit development without fertilization, thus the triploid watermelon fruits develop parthenocarpically and are seedless. Most bananas purchased at your local supermarket came from sterile triploid hybrids. The fruits developed parthenocarpically and are seedless.
B
Related Questions
Please help thank you :)
Answers
Answer:
i think it is a
Explanation:
Generally speaking, identify the overall structure
of the cell membrane?
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What muscle contracts and relaxes when you inhale and exhale?
a. tricep
b. lung
c. diaphragm
d. bicep
Answers
Answer:
c.
Explanation:
diaphragm contracts and relaxes. you may try it now at the very moment lol
During the light-independent reactions, the calvin cycle requires nadph and atp. Where does the cell get these molecules?.
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The energy carrying molecules are made in stroma where the calvin cycle takes place.
What function do ATP and NADPH serve in light-independent reactions?In photosynthesis, light energy is utilized to cause the photosystem I molecule to make ATP by transferring electrons from chlorophyll to nicotinamide adenine dinucleotide phosphate (NADPH) (Figure 5). In the light-independent processes of photosynthesis, this metabolic energy is utilized to fixation CO2 (Calvin cycle).
The calvin cycle or light independent reaction of photosynthesis happens in the stroma of the Chloroplast. It has certain enzymes that work with NADPH and ATP.
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What are the primary processes that increase genetic variability?
A. sexual reproduction and mutations
B. cloning and binary fission
C. asexual reproduction and mitosis
D. budding and recombination
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Answer:
A
Explanation:
nmn increases the aerobic capacity of humans during exercise training, and the improvement is likely the result of enhanced o2 utilization of the skeletal muscle
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Humans' aerobic capacity is increased by NMN during exercise training, and the enhancement is probably the result of improved skeletal muscle O2 use.
over the past ten years, studies have demonstrated the benefits of NMN for rodents' healthy ageing, increased longevity, and exercise capacity. For instance, adding NMN to one's diet improves energy generation, boosts physical stamina by over 50%, and benefits a number of physiological traits like insulin sensitivity and neuron functiAdditionally, some recent studies show that this study does, in fact, benefit humans, with NMN enhancing muscle performance in men over 60 and insulin sensitivity in prediabetic menopausal women. The topic of whether NMN has a good impact on ageing, health, and activity in younger person
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Which one of following is not included in the abiotic cycles?
A)
water
B)
phosphorus
C)
nitrogen cycles
D)
carbon
E)
magnesium
Answers
Answer: E. Magnesium
Explanation:
Trust me bro
100 POINTS!
Which of the following terms in Biology is best illustrated by the image below?
A. Selective Permeability
B. Independent Assortment
C. Fluid Mosaic Model
D. Facilitated Diffusion
Answers
Answer:
The answer is Selective permeability
Explanation:
Answer:
Selective Permeability
Explanation:
What do aerobic respiration and anaerobic respiration have in common?
O Both begin with glycolysis.
Both occur in mitochondria.
O Both require oxygen to proceed.
O Both end with the electron transport chain.
Answers
Answer:
A. Both begin with glycolysis
Correct on 2020 Engenuity
-They had it first so credit to them.
Answer:
a
Explanation:
What kind of bonds are found between carbon atoms of the fatty acid tails in saturated lipids?
Pls help me
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Someone plllsss help
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Answer:
They will most likely be immune to the treatment.
Explanation:
This is the same as a viruse evolving to survive the vaccine for it.
Describe how temperature and salinity affect the solubility of gases in the surface ocean
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Answer:
The solubility of gases such as oxygen and nitrogen depends upon the ocean water's temperature and salinity. As the temperature of the ocean water increases, the solubility of these gases decreases. The solubility of carbon dioxide is greater than the other gases because of its ability to react with ocean water.
Which of the following insect development stages is not the same as the other three?
cocoon
caterpillar
grub
maggot
Answers
cocoon is the correct answer
Answer:
cocoonExplanation:
URGENT PLEASE
Which of the following illnesses is caused by a virus?
common colds
diabetes
strep throat
malaria
Answers
explanation:
What do the function and structure of the forelimbs of the 4 animals tell us
about their evolutionary history?
Answers
Answer: biomarker: A substance used as an indicator of a biological state, most commonly disease.
trace fossil: A type of fossil reflecting the reworking of sediments and hard substrates by organisms including structures like burrows, trails, and impressions.
fossil record: All discovered and undiscovered fossils and their placement in rock formations and sedimentary layers.
strata: Layers of sedimentary rock.
fossiliferous: Containing fossils.
Explanation: hope this is what you mean if not ill try again
fernandes a, connors jm, carrier m. anticoagulation for subsegmental pulmonary embolism. n engl j med. 2019;381(12):1171-1174.
Answers
A pulmonary (lung) artery obstruction is referred to as an acute pulmonary embolism or embolus.
What can be diagnosis of acute pulmonary embolism?Acute pulmonary embolism (PE) causes 50,000 to 200,000 deaths per year and is a common cause of death. After coronary artery disease and stroke, it is the third most prevalent cause of mortality among cardiovascular diseases. The development of multi-detector computed tomographic pulmonary angiography (CTPA) has increased the rate of diagnosis of PE by enabling improved assessment of PE regarding imaging of the peripheral pulmonary arteries. As a result, more instances of accidental PE and isolated subsegmental PE (SSPE), two types of peripheral PE, have been discovered. Usually, patients with these two disorders have little to no evidence of the traditional PE symptoms, such as hemoptysis or pleuritic discomfort, abrupt dyspnea, or circulatory collapse.
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Mosquito repellent is sprayed on one arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours. what is the control,independent variable, dependent variable of this sentence.
Answers
In this experiment the dependent variable is the number of mosquito bites, the independent variable is the type of repellent the control group is the population that is not sprayed.
What is the dependent variable?The dependent variable is those that changes in the experiment, while the independent variable is not modified along the experimental procedure. Moreover, the control group is the sample in which the treatment isn't applied.
In conclusion, in this experiment the dependent variable is the number of mosquito bites, the independent variable is the type of repellent the control group is the population that is not sprayed.
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mention any two points that should be remembered for regular check up
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hope this helps :)
Which cell structure receives proteins from the endoplasmic reticulum and
temporarily modifies or stores them?
A. Nucleus
B. Golgi apparatus
C. Ribosome
D. Vacuole
Answers
I'm sure of this I learned it in 7th grade
What is the main function of environmental policy?
a.
prevent the use of natural resources
b.
reduce human impact on the environment
c.
prevent nature from having a harmful effect on humans
d.
reduce the use of natural resources
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
reduce impact on the environment
The main function of environmental policy is to reduce human impact on the environment. So the correct answer is B.
environmental policy is any action taken by a government, business, or other public or private organization to address the impacts of human activity on the environment, particularly those that aim to mitigate or prevent negative effects on ecosystems.
It is our approach to look for consistent improvement all through our business tasks to reduce our effect on the neighborhood and worldwide climate by saving energy, water and other normal assets; reducing the production of waste; repurposing and; minimizing our use of hazardous materials.
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CAN SOMEONE HELP WITH THESE QUESTIONS ?!!! I CAN HELP W MATH
Answers
Answer:
13) C
14) A
15) D
16) C
17) B, I think
Explanation:
I'm basically confused about the directions of this slide. Can someone help me?
Answers
If I am understanding correctly, the first thing they are asking you to do is match nitrogen bases.
Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).
Then, whichever are the double strands, cut them out and put them into you notebook. (I am not sure where the notebook is, but I am assuming you know)
Then in the speech bubble next to the picture of Chargaff- talk about his rule.
What does the rule mean?
What does the rule explain?
How is the rule demonstrated?
Lastly, finding percents. What percent of the pairs has Adenine in them?
For example:
If I look at this pairing below
A →T
T→ A
G →C
C→ G
50% of the pairs include Adenine.
Hope I helped! Comment if you have questions about my answer :)
Answer:
If the sequence of nitrogenous bases of a DNA strand is ATCTAGGCCG, the complementary strand would be TAGATCCGGC, with a percentage of guanine 30%, cytosine 30%, adenine 20% and thymine 20%, according to Chargaff's rule.
Explanation:
DNA is made up of sequences of nitrogenous bases, which are adenine (A), guanine (G), thymine (T) and cytosine (C). The bases of one strand are matched with the bases of another, according to the complementarity of nitrogenous bases, where:
Adenine is complemented with Thymine A=T Guanine is complemented with Cytosine G≡CThe image shows a DNA chain whose chain is complementary:
DNA Strand given Complementary Strand
Adenine Thymine
Thymine Adenine
Cytosine Guanine
Thymine Adenine
Adenine Thymine
Guanine Cytosine
Guanine Cytosine
Cytosine Guanine
Cytosine Guanine
Guanine Cytosine
Therefore, in a DNA molecule there is as much adenine as thymine, and an equal amount of cytosine and guanine. In this example there are 4 molecules of adenine, 4 molecules of thymine, 6 guanines and 6 cytosines.
The proportion or percentages of nitrogenous bases can be calculated according to Chargaff's rule.
Chargaff was able to establish that in a DNA molecule the ratio of purine:pyrimidine of 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine, according to the complementarity of bases.
Taking into account the law of the base pair, if in a DNA chain there is 30% of Adenine, in the molecule there is:
Guanine 30%
Cytosine 30%
Adenine 20%
Thymine 20%
Total ..... 100%
Organs work together as components of
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Answer: Organs are grouped into organ systems, in which they work together to carry out a particular function for the organism. For example, the heart and the blood vessels make up the cardiovascular system.
HELP DUE AT 4! THIS DEPENDS ON MY GRADE okay here is the model now I need help w the question: How many males in this model show the trait? A. One B. Seven C. Three D. Four
Answers
Answer:
C. Three
Explanation:
Which substance is used by plants during photosynthesis?
a. sulfuric acid c. carbon monoxide b. carbon dioxide d. urea
Answers
Answer:
i say that the answer is c
Explanation:
Answer:
Carbon dioxide
A fatty acid with no carbon-carbon double bonds; usually from animal sources and solid at room temperature.
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A fatty acid with no carbon-carbon double bonds; usually from animal sources and solid at room temperature is a saturated fatty acid.
What are saturated fatty acids?A saturated fatty acid is a special type of fatty acid composed of a carbon chain that does not exhibit any double bonds, which is well known to reduce fluidity.
In conclusion, a fatty acid with no carbon-carbon double bonds; usually from animal sources and solid at room temperature is a saturated fatty acid.
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The diagram shows two sound waves as transverse waves. Sound waves are
sometimes drawn as transverse waves to make certain properties easier to
compare.
Wave A
Wave B
1 cm
1 cm
15
www
What can you tell from comparing these waves?
O A. Wave B has a higher pitch.
B. Wave A is louder.
O C. Wave B has a lower pitch,
D. Wave A is softer.
ET
Answers
Answer: wave B has a higher pitch
Explanation:
I mean its obvious...
Answer:
A. Wave B has a higher pitch.
Explanation:
I took the quiz apix
Organic compounds all contain the element carbon. Which organic compound used for stored chemical energy contains carbon, hydrogen, oxygen, and often phosphorus?
A. Protein
B. Carbohydrate
C. Lipid
D. Starch
Answers
Answer: Lipids
Explanation:
It is believed that weed killers like 2,4-D and 2,4,5-T may
work by stimulating cell division. Why would the stimulation
of cell division make these chemicals effective weed killers?
Answers
Herbicides are a broad category of pesticides that are used to get rid of undesirable plants like weeds and grasses that hinder the development and productivity of desired agricultural crops. Both 2,4-D and 2,4,5T are also known as 2,4-Dichlorophenoxyacetic acid and
Herbicides like 2,4-D and 2,4,5-T are also referred to as auxin-type herbicides or plant growth regulators. Auxins are hormones that affect cell division and elongation in order to control cell growth.Auxins are required by plant cells in the proper concentration for growth and development. If auxin levels are too low, plant growth is not promoted at all, and if levels are too high, plant growth is excessively stimulated. Most grasses are not killed by 2,4-D and 2,4,5 T, but broadleaf weeds are. It moves to the plant's meristems after being absorbed through the leaves. These herbicides affect the tissues' cells, causing them to continually divide and proliferate. The plant finally dies as a result of this unchecked, unsustainable growth, which also causes stem curling and withering of the leaves.Thus, by promoting cell division, these compounds act as herbicides.
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PLEASE HELP 50 POINTS!!!!Which of the following best describes the approximate number of cells in the culture that are in interphase, as well as the consequence of the severe disruption of interphase in mitotic division of cells within a tissue?
A) There are approximately 917 cells in interphase. Disruption of interphase will have no effect on mitosis because they are two completely independent processes.
B)There are approximately 83 cells in interphase. Disruption of interphase will lead to a faster and more efficient mitotic cycle, which will result in increased cell division and tissue growth.
C)There are approximately 917 cells in interphase. Disruption of interphase will trigger the cell to switch to a mitotic phase and repeatedly divide, which will result in the massive proliferation of the cells and heightened tissue growth.
D)There are approximately 83 cells in interphase. Disruption of interphase will result in the cell being unable to synthesize proteins and organelles required to divide, which will result in the cell not passing key checkpoints and ceasing to divide.
Answers
Answer:
The correct answer is D, "there are approximately 83 cells in interphase. Disruption of interphase will result in the cell being unable to synthesize proteins and organelles required to divide, which will result in the cell not passing key checkpoints and ceasing to divide."
Hope this helps!