Water moves downstream because of a gradient in which of the following?

A. pressure

B. elevation

C. saturation

D. concentration

What main process in meiosis ensures genetic variation in the offspring

The physical process that makes gene linkage incomplete is A. segregation B. mitosis C. the lining up of chromosomes in the middle of the cell D. cyclin reaching a threshold concentration E. crossing over

13. What is an entomologist? 14. How do scientists test theories? 15. Write down ONE of Kettlewell's predictions. 16. Dark moths were found in what parts of the country? 17. How did Kettlewell directly study the moths? 18.

The function of a cell depends primarily on its

What does sexual dimorphism involve? a. it refers primarily to male and female social hierarchy. b. it concerns differences in body size and canine size. c. it refers to the mating rites of primates. d.

Which of the following would NOT be a constituent of a plasma membrane? Select one: a. messenger RNA b. phospholipids c. glycoproteins d. glycolipids

What discovery was made by alvin? a. over 4000 new species of marine life b. hydrothermal vents c. the aqualung d. the temperature of different parts of the ocean

Which choice describes dna after replication has taken place? two molecules, each with one original and one new strand one molecule with two original strands and one molecule with two new strands two molecules, each with two new strands two

A broad, high, flat, horizontally layered land feature is a (n) ?

Why are Red pandas going endangered?