What is the total fertility rate number associated with zero population growth, and why?
What will be an ideal response?
About 2.1, as that is 2 plus allowance for children born who do not produce children due to premature death or infertility.
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"A bands" in skeletal muscle are composed of
a. discs to which thin filaments are anchored. b. stacked thick filaments along with parts of thin filaments that overlap both ends. c. thin filaments but no thick filaments. d. thick filaments but no thin filaments. e. discs to which thick filaments are anchored.
Calcium is stored and released by the ____
a. T-tubules b. sarcomere c. troponin d. tropomyosin e. sarcoplasmic reticulum
Sam suffered a stroke in which one of the main branches of this vessel going to the brain was blocked
A) coronary artery B) jugular vein C) carotid artery D) renal vein
Which statement about cryptochrome is false?
a. It is implicated in resetting the biological clock. b. It is a "clock protein." c. It absorbs green light. d. Its counterparts are found in fruit flies and mice. e. It sometimes interacts with phytochrome.