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❖ Watson and Crick were most well known for the discovery of the double helix. The double helix is the twisted ladder of DNA.
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Answer:
Natural selection
Explanation:
According to Darwin, natural selection is the mechanism through which evolution takes place. Natural selection is the mechanism through which the heritable traits characteristic changes in an organism over the generations. Variations in traits of organisms are passed down through the generations and each generation has their genes affected by the environment.
Answer: The statement is true
Explanation:
Persons with type O- blood are often referred to as the "universaldonors" based on the presence of neither type A or B antigen on the red blood cell, coupled with anti-A and anti-B antibodies. Hence, since
the type O blood lacks antigens, it does not clump when mixed with any of the other blood types in the recipient plasma
Thus, the type O blood is a universal donor
Answer:
Where's the picture? or explanation?
