Roots of a plant typically grow downward, Walt shoots grow upward. This is most likely the result of differences in the-

A) concentrations of auxins in response to gravity

B) speed of fluid transport in response to temperature

C) percentage of open stomata in response to humidity

D) Active transport of nutrients in response to light

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.