Two gene copies are identical by descent if
a) two individuals have the same parents
b) one allele mutates to a second allele
c) selfing occurs
d) they are both inherited from the same gene copy in a recent common ancestor.
e) balancing selection maintains two or more alleles

Which of the following statements best describes the relationship between the environment and human health? a. the environment is the only factor that affects human health. b. many aspects of the environment can have an impact on human health. c. human health is impacted by changes in climate. d. the environment has no impact on human health. select the best answer from the choices provided

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated