What do survivorship curves display?
A. The change that an individual will live to a particular age
B. The number of organisms in different age groups
C. The population size over time
D. The dispersion pattern of a population
Answer: A
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Respiration includes breathing in, called ________, and breathing out, called __________.
Fill in the blank(s) with the appropriate word(s)
At an inhibitory synapse,
a. no transmitter substances are released by the sending cell. b. a transmitter substance produces changes in the receiving cell that drive the membrane potential away from threshold. c. no transmitter substance can bind to the receiving cell. d. a transmitter substance produces changes in the receiving cell that drive the membrane potential closer to threshold. e. a transmitter is degraded by an enzyme.
A nuclear envelope has four of the following characteristics. Which is the exception?
a. single lipid bilayer b. continuous with endoplasmic reticulum c. possesses pores d. controls passage of substances into and out of nucleus e. separates DNA from cytoplasm
Which molecule is released in tissues and diffuses to the target cell?
a. thyroid hormone b. insulin c. adrenalin d. prostaglandins e. growth hormone