During sexual reproduction, two sex cells fuse to create a fertilized cell with a complete set of chromosomes. What must be true about the number of chromosomes in each sex cell?

In this biome, very little light reaches the ground, because the tops of trees form a thick, dense canopy.

Protozoa are classified by the presence of cilia flagella and pseudopods or by their non motility. this classification method is based on their means of 1. growth 2. circulation 3. reproduction 4. locomotion

Multiple sclerosis occurs at a very high rate in Africans and East Asians. is usually the result of a dominant gene. is associated with damage to the myelin of the CNS. is most common in very warm climates. all of the above

When an animal is injected with an antigen, the animal will respond by producing: A. polyclonal antibodies B. Monoclonal antibodies C. both of the above D. Agglutinates E. none of the above

The anatomy of the intrinsic conduction system causes contraction of the ventricles to begin at the apex and move superiorly.

Water and soil pollution from oil and gas drilling is primarily what type of concern?

In the DNA chain the nitrogenous base adenine is combined with

Where would you find a stargazer? What did the Greeks call them and why? What do stargazers have to stun their prey? - What other mechanism do they have just behind the operculum and above the pectorals?

Gregor Mendel carried out a cross between two pea plants by taking pollen from a plant that was homozygous for round seeds and dusting the pollen onto the stigma of a plant homozygous for wrinkled seeds.

4 reasons why global warming is a problem