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NemiM [27]
3 years ago
8

how did farmers observed by charles darwin take advantage of natural variation to improve there livestocks ?

Biology
2 answers:
vovangra [49]3 years ago
8 0

Answer:

Darwin observed farmers performed selective breeding ( also termed as artificial selection) that includes selection of good breeds of animals ( having desirable traits) which were first selected through natural selection.

Farmers  allowed them to interbreed so that desirable traits accumulated in the hybrid organisms. This increased the overall yield or productivity of animals ( such as good milk yield from cows).

The farmers kept the animals with desirable traits and sold those that lacked the traits. This eventually led to the improvement of their own stock.    

Sonbull [250]3 years ago
5 0
<span>One of the most important things farmers did that improved the quality of their</span><span>
livestock, according to Charles Darwin, was to participate in selective</span>
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Define and give 2 examples of haploid cells
Step2247 [10]

Answer:

Haploid cells contain a single set of chromosomes. Gametes are an example of haploid cells produced as a result of meiosis. Examples of gametes are the male and female reproductive cells, the sperm and egg cell respectively.

Explanation:

6 0
3 years ago
Suppose that part of an amino acid sequence of a protein changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-gly
stira [4]

Suppose that part of an amino acid sequence of a protein changed from tyrosine-proline-glycine-alanine to tyrosine-histidine-glycine-alanine. This change was most likely caused by a point mutation called a <u>substitution</u>.

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Any protein is synthesized by joining a number of amino acids together. This amino acid is placed based on the sequences of the DNA , for every 3 sequence there is an amino acid that is synthesized and therefore it is called as a triplet codon, since there may be many sequence for a single amino acid we call it as degenerate codon.

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3 years ago
The primary stimulus for release of adrenal medullary hormones comes from Select one: a. the kidneys. b. aldosterone. c. the ant
Natasha_Volkova [10]

Answer:

Correct answer is ''e'' the sympatetic nervows system

Explanation:

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6 0
3 years ago
Read 2 more answers
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slega [8]

Answer:

1:1:1:1 walnut comb

Explanation:

If a cross is made between a female who is RRpp (rose comb) and a male who is rrPP (pea comb)  then:

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F1: RrPp RrPp RrPp RrPp

This means that all of the offspring in F1 generation will have heterozygous genotype (at both loci). Since it contains both dominant alleles, the phenotype is walnut comb.

4 0
3 years ago
A salt solution has a concentration of 200 g/L. How many grams of salt are contained in 500 mL of this solution?
noname [10]

Answer:

100g/500mL

Explanation:

1ml is .001 of 1 L

this means that per one ml, there is 200g*.001, or .2g/mL, or simply .2g.

now we multiply this by 500, for the 500ml we are calculating. 500*.2=100.

We can also skip these steps and take 200g*.5L, as 500mL is 1/2 liter. We get the same outcome, so the answer is 100g

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3 years ago
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