_____ aid in the coordination of the activities of adjacent animal cells.
-Keratin fibers
-Plasmodesmata
-Tight junctions
-Desmosomes
-Gap (communicating) junctions
Gap (communicating) junctions
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Which of the following statements about plant reproduction is incorrect?
A. Monoecious plants can have male and female flowers on the same plant. B. Dioecious plants have male and female flowers on different plants. C. Self-pollinating angiosperms are usually adapted to stable habitats. D. Outcrossing promotes genetic diversity. E. Self-pollinated plants must be visited by pollinators for fertilization to occur.
All species on Earth today are descended from a cell that lived as early as:
a. 4 billion years ago. b. 570 million years ago. c. more than 5 billion years ago. d. more than 10 billions years ago. e. 1.4 billion years ago.
Cytokinesis in plant cells occurs via the formation of a(n):
a. aster. b. mitotic spindle. c. Golgi complex. d. cell wall. e. cell plate.
Following ovulation, the follicle develops into a corpus luteum
____________________ Indicate whether the statement is true or false.