Zooxanthellae are photosynthetic algae living within the tissues of reef-forming corals
Indicate whether the statement is true or false
TRUE
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Because most natural populations are actually metapopulations, we can only understand their dynamics if, in addition to the births and deaths of individuals, we also understand:
A. the extinction of local populations. B. the colonization of local populations. C. r and K selection. D. the extinction and colonization of local populations. E. the extinction and colonization of local populations as well as r and K selection.
Saturated fats have long, straight tails of fatty acids, whereas unsaturated fats from vegetables have kinks in their tails due to double bonds. These kinks prevent the fats from packing together as tightly. Hydrogenated vegetable oils, or trans fats, have hydrogens added back to the double bonds and thus behave like
A. proteins. B. saturated fats. C. unsaturated fats. D. carbohydrates. E. waxes.
These epithelial cells function in secretion or absorption and are found in many glands and in the kidney tubules: ________
A) squamous B) cuboidal C) columnar D) stratified
Which statement is correct?
A. Pharyngeal clefts form internally between arches while pharyngeal pouches form externally. B. Pharyngeal clefts form externally between arches while pharyngeal pouches form internally. C. Pharyngeal Arch I grows over Pharyngeal Clefts I-IV, obliterating them. D. The ear is formed across Pharyngeal Cleft II, intervening mesenchyme, and Pharyngeal Pouch I.