There are four forces of evolution: mutation, gene flow, genetic drift, and natural selection.
Answer:
Differential reproduction leads to a change in allele frequencies over time. This occurs because of natural selection favoring "successful" individuals that produce more viable offspring.
The sickle-cell allele is maintained in populations exposed to malaria through balancing selection, since heterozygous individuals have protection against the disease.
Answer:
Plants respire through plant pores, called stomata. During respiration and photosynthesis, gases go in and out of the plants through stomata using diffusion, not breathing.
What type of tissue contains cells that send and receive electrochemical signals?
Nervous tissue contains cells that send and receive electrochemical signals
Attached is an image of a <span>catechol and a hydroquinone.
The specifity of the catechol oxidase is given by the spatial position of the OH groups. Most of the enzymes have an active site that's specific to spatial conformities of the substrate. If the substrate is not in such spatial conformation it may not be recognised be the enzyme.</span>