Joel is comparing two slides showing chromosomes in a sperm cell and a skin cell of a dog. He finds that the sperm cell has 39 chromosomes. How many chromosomes can he expect in the

skin cell?

Natural selection allows a species to change in response to its environment. What is the process by which a species becomes better suited to its environment called?

How can a person guard against a decrease in heart and lung function?

Cercariae, metacercaria, redia, and sporocysts are all life cycle stages of trematodes a. True b. False

During DNA replication, an open section of DNA, in which a DNA polymerase can replicate DNA, is called a replication fork. 2. Okazaki fragmentsare the short sections of DNA that are synthesized on the lagging strand of the replicating DNA. 3.

In the 1940's, while studying genetic inheritance in corn plants, Barbara McClintock discovered that segments of DNA could move from one place to another on a chromosome and even move from one chromosome to another.

Who was the scientist who discovered the rule of base pairing

characteristics of replication, transcription, translation, and mutation. which of these processes takes place in the nucleus of the cell? which can take place in both the nucleus and cytoplasm? how do you know?

The energy to power passive transport comes from:

By which process does water vapor become a cloud? A) evaporation B) transpiration C) condensation D) precipitation

What two purposes does semen have?