Which statements best describe how the great rift valley in africa formed? check all that apply.
the rift valley formed when the crust pulled apart.
the rift valley formed at a divergent boundary.
the rift valley formed similarly to an island arc.
the rift valley formed at a convergent boundary.
the rift valley formed when tectonic plates separated.

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.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome

Aplant with dark red flowers is crossed with a plant with white flowers. all of the offspring have dark red flowers with white spots. the alleles got flower color in this plant are both dominant both recessive codominant incompletely dominant