In the accompanying figure, which of the following represents a multicellular, haploid reproductive stage?
a. 1
b. 2
c. 3
d. 4
e. 5
ANSWER: d
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________ is the detection of a sensory signal while ________ is when the brain assigns a meaning to the signal
a. Perception, adaptation b. Sensation, adaptation c. Stimulus, adaptation d. Perception, sensation e. Sensation, perception
Sugars leave the source region and immediately enter into a ____, followed by direct movement into the ____
a. pit, perforation plate b. companion cell; sieve element c. pit, vessel element d. plasmodesmata, sink e. phloem tube, companion cell
Phagocytosis is a form of ____
a. diffusion b. endocytosis c. exocytosis d. osmosis e. facilitated diffusion
If the birthrate is 22 per 1000 per year and the death rate is 8 per 1000 per year, what is the population growth rate?
A. 22% B. 2.2% C. 0.8% D. 1.4% E. 14%