Agroup of students are walking in the park , and one of them takes a picture of a pollen grain that is being blown by the wind . that caption can the student use for this picture ?

a. gene mutation in action
b. gene flow at work
c. genetic drift as it happens
d. natural selection in progress

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Which level of consumer had access to the smallest apply of energy