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stiv31 [10]
3 years ago
6

Explain Charles Darwin’s idea of evolution by natural selection. Chose two of the events or people that influenced him in develo

ping his idea and describe how or what they did to influence his idea.
Biology
1 answer:
mart [117]3 years ago
3 0

The idea of evolution is that the species change over time. The proposed mechanism of evolution is natural selection. Natural selection favors inheritable traits, suitable (adapted) for survival and reproduction. Organisms with such traits will tend to leave more offspring than others, and thus will evolve over time.

Some of the people that influenced Darwin are:

• Lamarck who first proposed  that humans evolved from a lower species through adaptations over time

• Malthus, economist who explained that population grows faster than food production could sustain. So, Darwin proposed that only individuals that have favorable adaptations would survive.

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Alekssandra [29.7K]

The thymus is the only lymphoid organ that does not D. fight the antigens directly.

  • The thymus, bone marrow, spleen,lymph nodes, a network of lymphoid tissue along secretory surface (MALT), and the skin which performs the immune functions are known as lymphoid organs.
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  • The lymphocytes from bone marrow are transformed into specialised T cells in the thymus. In this way thymus helps to improve the immune system
  • T cells produced in the thymus is travels through the blood stream to lymphnodes and other parts of the body to fight against the antigen.

Learn more about Thymus on brainly.com/question/8565109

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7 0
2 years ago
Do the light reactions of photosynthesis depend on the calvin cycle?
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Answer:

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2 years ago
Explain how changes in the DNA sequences will impact the expression of genes.
mamaluj [8]

Ans.

DNA acts as genetic material in all living organisms that store and transmit genetic information from one to next generation. DNA sequence carries instructions for the expression of genes to make proteins, responsible for different phenotypic characters of individuals.

The DNA, first synthesizes mRNA molecule that carry information for the protein synthesis, in the form of codons and code for a specific polypeptide chain or protein.

The sequence present in DNA determines the amino acid sequence in protein encoded by the DNA. Change in DNA sequence affects gene expression as it leads to change in mRNA sequence, and thus, change in sequence of amino acid of the resulting protein.

7 0
3 years ago
Proteins carry out a variety of functions, and their function is critically dependent upon their structure and shape. enzymes ar
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It would undergo denaturation, in which the shape is altered. this prevents it from performing its function

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4 years ago
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