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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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In the term 2pq of the Hardy-Weinberg equation. Why is the multiplication by two necessary?
Gnesinka [82]

Answer:

The correct answer is : option B.

Explanation:

Hardy–Weinberg equilibrium is a mathematical model that states that genotype percentage or frequency in a population and allele in a population remains stable or constant to generations if there are no evolutionary influences present.

Hardy Weinberg equation is :

            P²+2pq+q² = 1

Here, p² represents the frequency of genotypes dominant homozygotes (AA) in a population in equilibrium. The term 2pq represents the frequency of heterozygotes (Aa)  as there are two ways of developing heterozygous individuals either dominant from the egg and recessive from sperm or vice versa. and the term q² represents the frequency of recessive homozygotes (aa).  

Thus, the correct answer is : option B.

3 0
3 years ago
Chemical break down of food
FinnZ [79.3K]

Answer:

photosynthesis

Explanation:

If you are referring to the chemical breakdown of food in PLANTS, not humans, then your answer is photosynthesis.

Hope this helps :)

7 0
4 years ago
Read 2 more answers
Select the correct answer from each drop-down menu.
Masteriza [31]

Answer:

The question is incomplete as the options are not stated, here are the options from another website.

options for A, B and C.

respiration,

photosynthesis,

transpiration.

The answers are;

1. Respiration.

2. Photosynthesis.

3. The processes form the carbon cycle.

Explanation:

From number 1. Prices which is respiration, respiration is a process of gas exchange which oxygen is inhaled and carbondioxide is exhaled into the atmosphere.

Photosynthesis uses the carbon to produce food. This is a process where carbondioxide are used by green plants in line with light energy from the sun and water to produce glucose and oxygen.

The processes are carbon cycle because carbon cycle shows how carbon flow from the atmosphere to the biosphere.

5 0
3 years ago
Particles of the ground that have a lot of energy can do two different things with this energy. What are these two things?​
Gwar [14]

Answer:

They heat up and they stay the same I believe, my teacher helped me with it so its heat up and stay the same or move. Something like that.

Explanation:

5 0
3 years ago
A frameshift mutation that occurs very early in a protein sequence would have what effect on the protein's structure? see sectio
ExtremeBDS [4]
I think a frameshift mutation that occurs very early in a protein sequence would have an effect on the structure of the protein such that the primary, secondary, and tertiary structures would be altered. A frameshift mutation occurs when a protein is drastically altered because of an insertion or a deletion. Insertions and deletions cause a change in the length of a gene, which causes a shift in the codon reading frame. 
7 0
3 years ago
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