Answer: C. Homologous chromosomes are separated in meiosis but not in mitosis.
Explanation: There are two main types of division that take place in eukaryotic cells, mitosis, and meiosis. Mitosis is the type of division that is used for growth, repair, and replacement of tissues. Therefore it is not necessary that the cells have different chromosome numbers or are varied genetically in the daughter cells in the case of mitosis.
Meiosis is the division that takes place to form the gametes for sexual reproduction. It is important in the first stages of meiosis I, to introduce variation and to halve the chromosome number.
Chromosomes numbers are halved (from 46 to 23) during meiosis I because the gametes (sperm and egg) come together and fuse during fertilization to form a zygote. When this fusion occurs (23 from the zygote and 23 from the egg), the chromosome number needs to be returned to that of the parent cell (46).
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Genetic variation is introduced during synapsis which only occurs in meiosis, not mitosis. Homologs exchange genetic information during crossing over of synapsis. Entire chromosomes also separate during meiosis I.
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At the end of meiosis, four genetically unique cells are produced with half the number of chromosomes as the parent cell (23 cromosomes) . After the process of mitosis is completed, two cells genetically identical to each pther are produced and have the same number of chromosomes as the parent cell (46 cromosomes).
Genetic variation is actually important because of changing environmental conditions.
Hi,
Hypothesis is tested by doing an experiment and COLLECTING DATA.
Hope this helps.
r3t40
Answer: Global warming is happening because the greenhouse gases are becoming more thicker which makes more of the suns radiation (heat) stay in the earth; as a result, this is increasing the earth's temperature.
The subject is geography :)
Explanation:
Question: <em>The image below shows the life cycle of a plant. Which class does this plant belong to? </em>
<em>Answer: Gymnosperm</em>
<em>If you look up Gymnosperm Life Cycle of Google, and go to images, you will find a diagram/chart of the Gymnosperm Life Cycle, that matched the picture you gave.</em>
Hope this helps, have a good day. c;
Link to the picture of the diagram below...:
https://www.google.com/search?q=gymnosperm+life+cycle&rlz=1C1GCEB_enUS787US787&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjR46qP1pDfAhUKR6wKHZVIBzQQ_AUIDigB&cshid=1544287366922000&biw=1707&bih=732&safe=active&ssui=on#imgrc=15Qy4QiBWX-1iM:
An ecological niche is an organism's specific habitat in an ecosystem.
It is where it lives and feeds, etc.
