Mendel knew that the variations in the offspring
generations resulted from his experiments
because he
•a. allowed plants to cross-pollinate.
.b. ensured that plants self-pollinated.
.c. controlled the fertilization process.
.d. changed the growing conditions.

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

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.

Which of these is not a nucleotide base found in dna?