What must happen before meiosis can begin?
A. Four gametes must be produced.
B. The four tetrads must be pulled apart.
C. DNA doubles and produces sister chromatids.
D. The cell membrane pinches together.
Answers
The process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).
What is meiosis?Meiosis is a cell division process that generates four daughter cells having half of the DNA when compared to the parental cell.
Meiosis needs first the duplication of the genetic material by means of a synthesis stage (S phase).
In conclusion, the process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).
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Related Questions
Which of the following describes an adaptation that relates to reproduction?
A. Hawks have sharp beak to help them quickly catch their prey
B. Elks attach leaves and grasses to their antlers to help them appear larger
C. Polar bears have white fur to help them blend into their surrounding
environment
D. Whales have a thick layer of fat called blubber to help keep them warm
Answers
Answer:
Explanation:
A is the correct answer
As Elks attach leaves and grasses to their antlers to help them appear larger, it shows adaptation relating to reproduction, i.e., option B.
What is an Elk?The elk or wapiti is a species of deer included in the Cervidae family which is one of the largest terrestrial mammals in North America, Central, and East Asia.
Female Elks are generally attracted to the larger male Elk which aids in reproduction.
Thus, the correct option is B.
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A fertilizer company is trying to find a new herbal pesticide to add to its product. Company managers know that peppermint oil or lavender oil will be used. They also know that the time of day the fertilizer is applied, morning and night, affects the pesticide. An experiment will compare all combinations of these choices. Three types of insects will be subjected to each treatment and scored for quality. What are the treatments
Answers
Answer:
Peppermint oil and morning, peppermint oil and night, lavender oil and morning, lavender oil and night
Step-by-step explanation:
Fertilisers are substances, which could be organic or inorganic, that is added to soil to increase crop yield.
Pesticide can be defined as substances that are used to control pests in an environment. Example of a pesticide includes:
- fungicides,
- herbicides( these are used to kill unwanted plants) and
- insecticides.
From the existing knowledge that the time of day the fertilizer is applied, morning and night affects the pesticide, and the Company managers know that peppermint oil or lavender oil will be used.
The insects should be subjected to the following treatments to effectively compare all combinations of these choices listed above:
- Peppermint oil and morning,
- peppermint oil and night,
- lavender oil and morning,
- lavender oil and night
Explicar las diferencias entre el concepto de alimento y el de nutriente
Answers
Crossing over occurs during Prophase II.
A. True
B. False
Answers
crossing over occurs in prophase 1 of meiosis 1. The significance of this crossing over is to ensure cell differentiation. If this occurred in prophase two it means the cells in meiosis 1 will be identical.
Answer:
B. False
Explanation:
Crossing over not occurs in prophase II. It occurs only during prophase I.
having hair on the back of the hand is dominant (H) and not having the hair is recessive (h) a mother has Hh and a father has hh if they have a child which genotype will make their child not have hair on there back of the hand?
Answers
Answer:
No, but when the person grows up then yes everyone should grow hair everywhere some pleople like that becouse then people would have more work to do.
Explanation:
Everyone should get extera work done, That is apart of life and no one should be ashamed of do stuff.
which question can be answered by science
1. Should we conserve water?
2. Is it right to recycle?
3. Which projects should be funded
4. Does this medicine reduce fevers?
Answers
Answer:
4.
Explanation:
The rest would (technically) be opinions while 4. would be a factual yes or no answer.
Explain why it is important for human to eat starchy food before a strenuous game of rugby
Answers
Answer:
They provide long lasting energy.
Explanation:
Any sport including Rudgy is strenuous movement over a period of time. You went energy sources that will sustain you for that duration.
Kingdoms are a more specific (less broad) category in the taxonomic hierarchy.
A. True
B. False
Answers
true helpful answer to your question
Answer:
false
because if you actually order the levels of classification from MOST specific to LEAST specific, kingdom would be somewhere last.
Which level of organization is shown in the diagram?
Answers
Answer:
which diagram, tell
you haven't shown any diagram.
Answer:
Organ
Explanation:
This Is For Edgennuity Q:10
pairing of density dependent and density independent
Answers
Answer:
Density-dependent regulation can be affected by factors that affect birth and death rates such as competition and predation. Density-independent regulation can be affected by factors that affect birth and death rates such as abiotic factors and environmental factors, i.e. severe weather and conditions
What are 4 producers of the boreal forest
Answers
Answer:
Moss, jack pine, black spruce, and white spruce.
explain why you would recommend the nguni cattle meat to consumers in your locality?
Answers
Answer:
Due to their natural growth.
Explanation:
I would recommend the meat of Nguni cattle to consumers in the locality because of their pure quality. These cattles have excellent resistance to internal and external parasites with natural immunity to kill borne diseases. There is no injections or vaccines are given to these cattles which enables them to grow in natural environment. So due to their natural growth, the meat have higher quality as compared to other cattle's meat.
please help will mark brainliest
Answers
They overgrazed on the parks vegetation and grasses.
What does codominance mean in genetics?
Both alleles are dominant.
O Both alleles are recessive.
O The alleles are neither dominant nor recessive.
O Each allele is both dominant and recessive.
Answers
Answer:
Yes each abele is both dominant and recessive
Explanation:
Because it’s true
qué ventajas le trajo al ser humano el poder andar en 2 patas.
Answers
Answer:
The advantage that hominids had when they developed bipedalism is truly great. Walking on two legs instead of four allowed hominids to free up their arms. Using their arms they could now make tools, stretch trees, and use their hands for social communication. The development of bipedalism also allowed for long-distance walking and eventually endurance running. Bipedalism, basically, was a key step for hominids' "brains to grow".
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La gran cantidad de ventajas que trajo el bipedalismo significó que todas las futuras especies de homínidos llevarían este rasgo. El bipedalismo permitió a los homínidos liberar completamente sus brazos, lo que les permitió hacerEnglish:
The advantages
The host of advantages bipedalism brought meant that all future hominid species would carry this trait. Bipedalism allowed hominids to free their arms completely, enabling them to make and use tools efficiently, stretch for fruit in trees and use their hands for social display and communication.#CarryOnLearning
A scientist is studying a cell from an unidentified organism. Which of these observations of the cell provide evidence for classifying the cell as PROKARYOTIC and NOT EUKARYOTIC? Select all that apply
The cell has a cell wall.
The cell lacks mitochondria, chloroplasts, and other membrane-bound organelles.
The cell has a cell membrane.
The cell has ribosomes in its cytoplasm.
The cell lacks a nucleus.
Answers
Answer:
hfdjjjjjjhgjluhb
Explanation:
What is an allele?
A. a DNA sequence
B. a form of a gene
C. a hairstyle
D. a physical trait
Answers
B. a form of gene is the correct answer
Weeding is a cultural farmer’s practice? TRUE OR FALSE
Answers
Answer:
This is true.
Explanation:
All practices include:
mulching.
thinning out.
pruning.
stirring.
fertilizer application.
earthing-up.
pest control.
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If Charles Darwin could return to the Galapagos Island today, which of the following is an example of a change he might see?
O A. no changes
O B. more islands
O C. more tortoises
OD. new species of iguanas
Answers
If Charles Darwin could return to the Galapagos Island today, an example of a change he might see a new species of iguanas.
What are the discovery of Charles Darwin ?Charles Darwin has had many Discoveries are The Expression of Emotions in Humans and Animals. (1872) which explains how animals emotions are different from humans and how they express and different from us.
The Descent of Man (1871) where he explains how us and animals aren't different but extremely different, he also explains how we process things differently and how differently we live.
Darwin's Beagle Diary(1831 - 1836), here he explained about everything he sees and finds throughout his trip, showed how the animals live and how they adapt to the area.
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two examples of molecular biology
Answers
good morning
its jess..
your answer is here
human blood protein are most similar to chimpanzee among all apesOnly plants and some algae have chlorophyll so they are most closely relatedExplanation:
hope it may help u
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Excess carbon dioxide in the lower atmosphere acts like a(n)_____, which traps solar energy and leads to the greenhouse effect
A. funnel
B. electrical wire
C. mirror
D. glass pane
Answers
Answer:
D
Explanation:
because a glass pane acts lIke an insulator , which does not allow heat to escape
Is digesting food a physical or chemical chnage?
Explain how you know what kind of chnage occurred
Answers
Answer: Digesting food is a chemical change.
Explanation:
Chemical changes cannot be undone so digesting the food is considered a chemical change.
cells are surrounded and protected by
Answers
Answer:
Plasma membrane or cytoplasm
Explanation:
How will hormone travel to its target organs?
A. Carried by neurons
B. Sweat glands
C. Carried by the blood
D. Carried in the digestive tract
Answers
Answer:
the answer is C no
Explanation:
It is the ans
Answer:
c
Explanation:
endocrine glands hormones directly into bliidstream
What type of RNA acts as a temporary copy of DNA's instructions and provides details on how to assemble a polypeptide
chain?
Answers
Answer:
mRNA
Explanation:
There are three types of ribonucleic acid (RNA) viz: messenger RNA, ribosomal RNA (rRNA) and transfer RNA (tRNA). These three RNA types function differently from one another. mRNA is a type of RNA that conveys genetic information that was previously stored in DNA into the ribosome for translation i.e. synthesis of amino sequence.
In other words, mRNA acts as a temporary copy of DNA's instructions and provides details on how to assemble a polypeptide chain using the amino acid sequence that arise from translating it in the ribosomes.
Choose the verb form that correctly completes the sentence.
Why_? you at work yesterday?
wasn't
aren't
weren't
isn't
Answers
Answer:
the answer is weren't
Explanation:
wasn't = was not
aren't = are not
isn't = is not
Explain the advantage of an increase in the number of mitochondria in slow twitch fibres. Include at least 2 points in your response
Answers
Answer:
To produce more ATP molecules.
Explanation:
The advantage of an increase in the number of mitochondria in slow twitch fibers is to provide more ATP is provided to the muscles. These large number of mitochondria is responsible for the production of large amount of ATP which is a fuel that is used by the muscles of the boy in order to continue working. There is high burden on the slow twitch fibres in order to continue its movement, more mitochondria is needed.
Which of the following is true about the group Archaea?
A. Archaea has more genetic similarities to Bacteria than Eukarya
B. Archaea and Bacteria both have a nucleus
C. Bacteria and Eukarya are both prokaryotes
D. Archaea has more in common genetically with Eukarya than Bacteria.
Answers
Answer:
D. Archaea has more in common genetically with Eukarya than Bacteria.
Explanation:
Archaea are unicellular, prokaryotic microorganisms that differ from bacteria in their genetics, biochemistry, and ecology. Some archaea are extremophiles, living in environments with extremely high or low temperatures, or extreme salinity. Only archaea are known to produce methane.
Answer:
D. Archaea has more in common genetically with Eukarya than Bacteria.
Explanation:
Yes, archaea has more in common genetically with Eukarya than Bacteria. Archaea constitute a domain of single -celled organisms.
How does convection cause ocean currents?
A. During the process of convection, energy is transferred to the atmosphere forming winds. These winds power surface currents.
B. During the process of convection, the heating of surface water by the sun results in upwelling.
C. During the process of convection, energy in warm water is lost to its surroundings. The water cools, becomes denser, and sinks.
D. During the process of convection, more minerals and gases dissolve in warm water. This increases the density of the warm water and causes it to sink.
Answers
Answer:
C. During the process of convection, energy in warm water is lost to its surroundings. The water cools, becomes denser, and sinks.
Explanation:
Convection refers to the process of transference of heat from one place to another by the movement of gas/liquid particles. Convection occurs when a gas or liquid substance is heated, thereby it expands (increase its volume) by gaining kinetic energy and moving far apart. Energy in the atmosphere and oceans is transferred mainly by convection. In the atmosphere, convection produces wind belts. Moreover, an ocean current is the result of the continuous movement of seawater caused by different forces acting upon the water (i.e., wind, the Coriolis effect, waves, temperature). In the oceans, convection produces currents because the seawater heats up becoming less dense and moves above cooler seawater, emitting heat during the process and causing the continual circulation of water.
Answer:
c
Explanation:
Can someone please answer these multiple choice questions. (29 to 32) Will mark as brainliest.
Answers
30.A
31.C
32.A
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