A blastula is A. the innermost germ layer. B. a hollow ball of cells in an embryo. C. a stage of development before a zygote. D. a digestive organ.

Which structure has both reproductive and excretory functions?

What are the genotypes of these flies? a. white eyed, male b. red eyed female (heterozygous). c. white eyed, female d. red eyed, male

The mutagens that result in cancer damage DNA by

Where substance is produced during cellular respiration

The insulin used to treat people with diabetes is commonly produced by inserting the DNA sequence for human insulin into a bacterium. The insulin the bacterium produces using that sequence is then harvested.

Why are most open ocean organism found in the epipelagic zone?

What is the purpose of a hypothesis? O A) It specifies the procedure for a scientific experiment. OB) It is a prediction of whether an experiment will give useful results. OC) It tells other scientists what kind of research they should be doing.

What plays many roles in the body and determines many traits

Which of the following has the greatest level of certainty? Law Theory Hypothesis None of the above

Is there any place on Venus humans could live? Explain.