In an ecosystem, medium-sized seeds have been depleted. Therefore, LARGE and SMALL beak sizes are favored in a bird population. What kind of selection is occuring in this example?
a Stabilizing
b Disruptive
c Directional
d Natural

2. if scientists identify an animal with bilateral symmetry and no segmentation, which phylum can it definitely not belong to? a. roundworms b. annelids c. mollusks d. flatworms

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.

Crossing over is a method of (blank)?