Programmed cell death
a. timing is usually unpredictable.
b. involves reception and transduction but not
response.
c. is regulated by control genes.
d. is triggered in some cancers.
e. operates only in animals.
Answer: c
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A. higher; cavitation from freezing B. higher; cavitation from air leaks C. higher; conduit collapse D. lower; cavitation from freezing
Phloem transports products of photosynthesis from the ________ to a(n) ________
a. stomata / root b. sieve tube / stoma c. mesophyll / sink d. companion cell / end plate
If the peptidoglycan layer is between two plasma membranes in an organism, that organism is
a. Gram-negative b. an archaean c. Gram-positive d. chemoautotrophic e. eukaryotic
Hagfishes have three-chambered hearts, which improve gas exchange with the lungs
Indicate whether the statement is true or false