Which protein is a positive regulator that phosphorylates other proteins when activated?

p53

retinoblastoma protein (Rb)

cyclin

cyclin-dependent kinase (Cdk)

Which of the following is not one of the kingdoms of living things

The number of individual organisms of a particular species in a group

Which of the following is not a type of particle that is found in the nucleus of an atom A; electron B; proton C; neutron

What is not characteristic of primitive mammals? A. scavengers B. feathered C. small, rodent-like D. plant-eaters

Explain why the outer planets have a lower density than the inner planets.

In beetles, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination.

At what phase of meiosis is the number of chromosomes per cell doubled? What happens after that so that the number of chromosomes per cell does not end up being higher?

Unlike endocrine glands, exocrine glands a. release hormones. b. do not usually have ducts. c. release secretions outside of the body. d. release secretions directly into the blood

How the structure of DNAallows it to serve as the basis for inheritance?

Where does DNA replication happen?