Which of the following statements about plant cytokinesis is true?
a. It begins when telophase ends.
b. A division furrow completely separates the cytoplasm.
c. It is under the control of Ca2+.
d. Vesicles fuse to form a cell plate.
e. The spindle fibers break down to form a cell plate.
Ans: d. Vesicles fuse to form a cell plate.
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Chimpanzees given food will readily share with other chimpanzees, even if not related. Which of the following is an explanation for this observation?
A. Sexual dimorphism is occurring. B. They anticipate reciprocal altruism. C. Dominance hierarchy is occurring. D. It is a reflex. E. They are engaging in kin selection.
When an indirect interaction is beneficial to one of two interacting species and neutral to the other, the indirect interaction is termed indirect ________
Fill in the blank(s) with correct word
When alleles on a pair of homologous chromosomes move into different gametes during meiosis, this demonstrates
A) segregation. B) crossing over. C) dominance. D) recessive inheritance. E) fertilization.
Matt is studying how the protein transferrin enters cells. He examines cells that have taken up transferrin, and finds clathrin-coated vesicles. What mechanism was used to take transferrin into the cell?
A. phagocytosis B. pinocytosis C. receptor-mediator endocytosis D. exocytosis