The acrosome of sperm cells contains an enzyme called hyaluronidase. Which of the following procedures would benefit from the addition of hyaluronidase?
A) ligating two strands of DNA together
B) helping a drug to pass through a cell membrane
C) assisting with mitotic division of skin cells
D) increasing levels of FSH released from the hypothalamus
Answer: B
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Which of the following statements about the cell wall is FALSE?
A. The cell wall constitutes the ECM of plants. B. The cell wall is composed predominantly of proteins. C. The cell wall provides protection, rigidity, and shape to plant cells. D. The cell wall is composed of two distinct layers. E. The cell wall is composed mainly of carbohydrates.
In the life cycle of flowering plants, meiosis
a. occurs before seed formation. b. occurs in the ovule. c. gives rise to microspores. d. gives rise to megaspores. e. does all of these.
The thermocline is permanent in tropical bodies of water and seasonal in temperate bodies of water
Indicate whether the statement is true or false
A primary measure of productivity is linked to
A) carbon. B) nitrogen. C) oxygen. D) water.