Which mechanism are responsible for introducing new allies into a population's gene pool

A gene flow

B emigration

C niche shift

D natural selection

Why does a block of metal sink in water but the same size block of wood float? The molecules in the metal are closer together than the molecules of the wood. The metal is more compact.

You are assessing a pregnant woman whose chief complaint is vaginal bleeding. she is 8 months pregnant and has moderate, bright red bleeding. she says that her doctor was concerned about the location of the placenta. this condition is known as:

Which of the following is not a characteristic of a tetrad? A. It exists only during meiosis I. B. It contains two pairs of identical chromatids. C. It contains a pair of homologous chromosomes. D. It has only the haploid number of chromosomes.

Why wont traits be found at 100% frequency with each other in offspring even though they are all on the same chromosome?

What is the brain made of

What role do specialized cells perform in establishing homeostasis? Specialized cells work independently to perform their specific functions. Specialized cells work only as a team to perform the functions of the body.

A chart shows how members of a certain family are related to each other, and it shows which members of the family express a certain trait or set of traits. a. pedigree b. genotype

Which product is formed during the metabolic reactions of cellular respiration?

What does it mean when plants and fungi are inmobile?

What is another name for inherited advantageous characteristics