How are populations involved in speciation?
A. interbreeding with other populations must occur
B. large populations must decrease in number
C. population gene pools must become isolated
D. small populations must increase in number
Answer: C. population gene pools must become isolated
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Microsporangia in flowering plants are located in the _____
A) stamen B) carpel C) petals D) sepals E) receptacle
Which number identifies the proximal promoter?
a. 1 b. 2 c. 3 d. 4 e. 5
The euglenoids are characterized by the disc-shaped cristae of their chloroplasts
Indicate whether the statement is true or false.
Which one of the following is TRUE regarding active transport?
A) Active transport requires the input of energy. B) Molecules are moved across a plasma membrane from an area of higher concentration to an area of lower concentration. C) Active transport relies on the process of diffusion. D) Molecules to be transported attach to phospholipids in the plasma membrane; as the phospholipids change shape, the molecules are moved across the membrane. E) This mechanism allows a cell to equalize the concentration of molecules on either side of the plasma membrane.