In general, how many different kinds of proteins does a cell contain?

In the lab, Nachman examined dark mice from two different populations living hundreds of miles apart. The mice looked nearly identical. Their dark color was caused by two different genes. What does this tell you?

George wants to know if the amount of water he uses on his plants will affect their growth. He buys three of the same plants and puts them in the same size pot with the same type of soil. He puts all three plants in the same place outside.

Tumors can deprive cells of oxygen. this happens through angiogenesis, which is

An intrinsic value biodiversity stems form religious, moral, or either obligations to preserce the worl's species. a. True b. False

In DNA recombination, what is created when the DNA is opened up at the restriction site?

Usually flowers contain more stamens than pistil. Why?

Choose all the answers that apply. Water: 1. can dissolve most substances 2. has a strong attraction to itself 3. is neither acidic nor basic 4. contracts when it freezes 5. heats up and cools down more quickly than land

A seismic station recorded the P-wave, but no S-waves, from an earthquake because S-waves were what?

In vertebrates, what joins the brain to the rest of the body? A. spinal cord B. medulla oblongata C. peripheral nervous system D. vertebral column

Flagship species are often the focus of successful conservation efforts. What are the advantages and disadvantages of this approach to biodiversity conservation? Do you think the advantages outweigh the disadvantages?