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Tresset [83]
3 years ago
15

What is the agricultural practice that focuses on the economic viability of crops and the use of non-renewable resources effecti

vely? A) commercial farming B) non-renewable farming C) industrial agriculture D) sustainable agriculture
Biology
2 answers:
Ilia_Sergeevich [38]3 years ago
8 0
Sustainable agriculture
zlopas [31]3 years ago
6 0

Answer:

D) sustainable agriculture

Explanation:

Sustainable agriculture is a type of agricultural practice that is mainly involved in the production of long term crops and livestock without causing environmental degradation. Sustainable agriculture ensures economic viability of crops and efficient use of nonrenewable resources and on-farm resources. In sustainable agriculture, the use of fertilizers and pesticides is reduced, mixing crops method is used to avoid diseases destroying a whole crop, water is conserved by using water management systems (such as drip irrigation), and there is promotion of biodiversity in crops grown .

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You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat, and the r
Genrish500 [490]

The question is incomplete. Here is the complete question.

You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat and the rest have a dark coat. You know that light coat color is recessive in ground squirrels. What is the allele frequency for the light coat allele  and the dark coat allele? How many of the dark coated individuals do you expect to be heterozygotes at the coat color gene? Assume the population is at H-W equilibrium.

Answer: Allele frequency for light coat: q = 0.3;

              Allele frequency for dark coat: p = 0.7;

             There will be 42 heterozygote;

Explanation: A population in H-W equilibrium is a population which doesn't change from one generation to the next if there are no disturbing factors, as migration or mutation.

It follows the equation: p^{2}+2pq+q^{2}=1.

p represents the frequency of the dominant allele;

q represents the frequency of the recessive allele;

2pq represents heterozygote individuals;

The sum of frequencies of both alleles must be 1, i.e.: p+q=1

For the population of squirrels:

  • Frequency of recessive allele

q^{2} = \frac{9}{100}

q = \sqrt{\frac{9}{100}}

q = 0.3

  • Frequency of dominant allele

p+q=1

p=1-q

p=1-0.3

p = 0.7

  • Frequency of heterozygote

2pq = 2*0.7*0.3 = 0.42

In a population of 100 individuals: 0.42*100 = 42

The allele frequency for the light coat is 0.3; for the dark coat is 0.7.

It is expected to have 42 heterozygote individuals in this population.

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I know you didn't post your answer choices but I believe your correct answer would their cell walls consist mainly of cellulose.

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