How does phytochrome control flowering?
A) by disrupting the plant's photoperiod
B) by detecting differences in temperature in the spring
C) by sensing sunrise and sunset
D) by inducing differentiation of cells in the apical meristem
Answer: C
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The number of protons in an atomic nucleus can also be described as the __________ of an atom.
a. atomic mass b. mass number c. isotope number d. atomic number
Chloroplasts
a. resemble photosynthetic bacteria. b. utilize the same pigments regardless of what organism they are in. c. apparently evolved from mitochondria. d. utilize DNA derived from the nucleus. e. are all of these
Cells that have undergone a response that causes them to enter a permanent state of growth arrest, like those that comprise a mole are said to have entered a state called
a) adolescence b) senescence c) pubescence d) bellioscosityb) senescence
Epidemic typhus, spread by lice, is caused by
A. Chlamydophila pneumonia. B. Chlamydophila psittaci. C. Ehrlichia caffeensis. D. Rickettsia prowazekii. E. Rickettsia typhi.