The brain and spinal cord are formed from

a. the notochord, which forms from endoderm

b. the neural tube, which forms from mesoderm

c. the neural tube, which forms from ectoderm

d. the notochord, which forms from mesoderm

In some species of jellyfish, red pigment is dominant to orange pigment. Give the genotype and phenotype between a homozygous dominant jellyfish and one that is orange.

In some freshwater organisms there is a structure called a contractile vacuole that regulates water movement into and out of the cell. What explains the existence of the CV?

For how many minutes should you flush your eyes if they come in contact with acetic acid?

The final steps of cytokinesis follow which phase of mitosis?

Orchids are a recently evolved plant that have a novel feature known as aerial roots. What is the most likely function of an orchid's specialized roots

Which of the following choices is a biotic factor in the ecosystem? sunlight, water, deer, soil

Suppose that a given gene undergoes a mutation to its dominant allele such that two out of 100,000 offspring exhibit the new mutant phenotype. Assuming that these offspring are heterozygous, what is the mutation rate for the gene

A blood smear is used to diagnose malaria. In patients with malaria, the protozoa can be found near and inside red blood cells. Explain why a microscope capable of high magnification and high resolution would be meeded to diagnose malaria

Why does the lipid bilayer self assemble?

3. In pea plants, inflated pods are dominant to constricted pods. Show the cross between a true-breeding inflated pod plant with a true-breeding constricted pod plant.