recessive genes are expressed under which of the following conditions?
a. every time they are found in an organism.
b. in green plants that reproduce through seeds.
c. when asexual organisms produce a pair of offspring.
d. only in the absence of dominant genes for the same trait.

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations