Which statement is false about cephalopods?
a. They were dominant predators of the sea 500
million years ago.
b. They had an elaborately chambered shell in the
past.
c. All but one modern species has either a reduced
shell or none at all.
d. Adaptive radiation of fishes led to selection
pressures favoring speed and a large brain.
e. They have an open circulatory system.
Answer: e
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Answer the following statement true (T) or false (F)
Instead of being isolated by pure culture, SAR11 was discovered when researchers analyzed the gene sequences contained within seawater samples
A. true B. alse
Larger animals have higher basal metabolic rates than smaller animals
A. true B. false
Select the correct sequence of events involved in regulating secretion of thyroid hormones
1. pituitary releases thyroid-stimulating hormone (TSH) 2. hypothalamus secretes thyroid-releasing hormone (TRH) 3. thyroid hormones inhibit long-term TRH secretion 4. thyroid secretes thyroid hormones 5. thyroid hormones inhibit TSH secretion
a. 1, 2, 4, 5, 3 b. 2, 1, 4, 5, 3 c. 3, 1, 4, 5, 2 d. 3, 4, 1, 2, 5 e. 2, 4, 5, 1, 3