What type of t cell can directly attack and kill other cells?

4. Which of the following radioactive isotopes takes the longest to decay: Carbon-14, Potassium-40, Uranium-238 or Rubidium, 87?

Which of these pieces of evidence supported alfred wegener's original theroy of the contineltal drift

Why is protein synthesis different in prokaryotes and eukaryotes? O A. In prokaryotes, DNA is stored in the cytoplasm. O B. In prokaryotes, DNA is made of amino acids. O C. In prokaryotes, DNA is made of nucleic acids. O D.

What is the coati animal eating habits

Describe why genetic variation is needed

Organisms that have groups of specialized cells organized into organs are always

What is a cell how does it effect the body

A farmer crossed a yellow maize plant (Yy) with another yellow maize plant (YY). He planted 200 seeds from this cross. How many of the plants would be yellow?

How do the methods of scientists lead to knowledge?

Actions you do without thinking about them