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swat32
3 years ago
13

4a. By 40-60 years after farm fields had been abandoned, the amount of herbaceous plants

Biology
1 answer:
Mila [183]3 years ago
5 0

Answer:

See the answer below

Explanation:

The amount of herbaceous plants in an abandoned farm field will keep decreasing with time and the amount of trees would be increasing instead <u>due to successional forces.</u>

Succession refers to the gradual change in the species structure of a community with time. Early successional species usually colonize new habitats and with time, they are replaced with late successional species until a relatively stable community, climax community, is established.

<em>Herbaceous species on abandoned farmland represent early successional species and as time goes on, they will be replaced by mid to late successional species in the form of shrubs and trees until a relatively stable community is formed. Hence, herbs would be decreasing while trees would be increasing. </em>

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Answer:

Codominance

Explanation:

Codominance is the pattern of inheritance when both the alleles of a gene are expressed in a heterozygote. Here, none of the alleles is recessive to other allele and there is no masking of expression of one of the alleles in the heterozygous genotype. Therefore, both alleles express themselves equally in a hybrid.

Examples include I^A and I^B alleles of ABO blood type in humans. These two alleles are codominant and are equally expressed in genotype "I^AI^B". The person with genotype "I^AI^B" is said to have an "AB" blood type.

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3 years ago
Which of the following terms best describes the place in an evolutionary tree that represents a currently living population?
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Answer:

<em>b. Branch</em>

<em></em>

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slava [35]

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Degenerate.

Explanation:

The genetic code has following properties -

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Out of these properties the Property of Degeneracy has been used in the situation mentioned in the question. Due to degeneracy of the genetic code, more than one codons can code for a single amino acid. Property of degeneracy in the code minimizes the mutational lethality.

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