Which of the following is a characteristic seen in prophase I that does NOT occur in prophase II?
A) Chromosomes move to the middle of the cell.
B) Spindle formation occurs.
C) The number of chromosomes doubles.
D) Crossing over occurs.
D
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Fruits have contributed to the success of angiosperms by _____
A) nourishing the plants that make them B) facilitating dispersal of seeds C) attracting insects to the pollen inside D) producing sperm and eggs inside a protective coat E) producing triploid cells via double fertilization
Scientists estimate that carbon dioxide in the atmosphere has increased by 35% in the last 150 years
Indicate whether the statement is true or false.
Predict the result when a phosphate-containing chemical is released by a factory into a pond
A) All living things will always die in such cases. B) Eutrophication will occur. C) Climax species will invade. D) Predatory fish will increase in population faster than other living things.
Chlorophyll is found in which part of the plant cell?
A) stroma B) plasma membrane C) cytoplasm D) thylakoid