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RoseWind [281]
3 years ago
10

Possible question and essays for gr 12 Life Scences​

Biology
1 answer:
love history [14]3 years ago
5 0

Answer:

Explanation:

Possible Essays for Life Science:

1. "Explain four management strategies to improve the quality of  drinking water. Uncle Two sources of water pollution and Two  effect of water pollution on human health. "

2. "Eutrophication is one of most important water quality problem  South Africa. Describe Eutrophication, what causes it and how it  affects water quality."

3. "Describe the significance of DNA replication and meiosis and how the foetus is  protected and nourished in the uterus."

4. "Describe how meiosis contribute to genetic variation and how

abnormal meiosis leaf to down syndrome and polyploidy. Also

describe advantages of polyploidy in agriculture. "

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Answer:

Forest.

Explanation:

Berries and nuts are typically fruits and products of trees, and there must be plentiful amount in which to have a population (though it states only an organism, but it can be assumed). Brown fur is typically <em>camo</em> against a brownish background, which can be reflected essentially through bark & wood of trees.

*Most likely the given organism is a squirrel, which typically prefer forest or habitats with trees or tree-like objects.

~

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2 years ago
Why is mitosis responible for for growth, repair, and maintence
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Answer:

Mitosis can be described as a cell division process in which two daughter cells are produced which are identical to one another and to the parent cell. Hence, mitosis is responsible for growth, maintenance and repair because it produces daughter cells which are exact duplicates of the mother cell. For example, damaged skin gets repaired by mitosis as the skin cells duplicate and produce identical copies. Some organisms can even regenerate their entire body parts through the process of mitosis.

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The diploid number for a lily whose pollen contains 12 chromosomes would be _________ and is produced when the pollen
KATRIN_1 [288]

Answer:

24 chromosomes.

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The diploid number for a lily whose pollen contains 12 chromosomes would be 24 chromosomes and is produced when the pollen moves from a stamen to the stigma and fecundates the female gamete. Thus, a diploid cell, with 24 chromosomes (12 pairs, 12 x 2), is formed.

Gametes are haploid, it means, they contains half of the chromosomes.

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