The expression "pull of the recent" refers to the fact that ________
A) younger fossils are more important for the study of evolution than older fossils
B) older rocks are more likely to be volcanic rocks with no fossils
C) younger rocks are more likely to be covered up or otherwise inaccessible
D) the quality of the fossil record gets worse the farther back in time you look
E) younger fossils are more likely to be preserved by permineralization
D
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PSI is a __________ than PSII
A. weaker oxidant B. stronger oxidant C. stronger reductant D. weaker oxidant and a stronger reductant E. stronger oxidant and a stronger reductant
Development of the pancreas in an embryo into a dual gland that has both exocrine and endocrine functions begins when
A) insulin is produced and bathes stem cells. B) a transcription factor stimulates progenitor cells to give rise to exocrine or endocrine cells. C) a globin gene duplicates and gives rise to alpha and beta globin genes. D) progenitor cells become stem cells.
In modern terms, Mendel's law of independent assortment states that ________
a. genes are sorted into gametes independently of other genes b. alleles are separated from each other during meiosis c. the probability of two independent events occurring together is the product of the individual probabilities d. alleles are sorted into the same gamete during meiosis
Which structure of the eudicot embryo within a seed is NOT correctly identified?
(a). The radicle is the embryonic root (b). A cotyledon is a seed leaf. (c). The endosperm is the nutrient source for the embryo. (d). The epicotyl is the shoot above the attachment of the cotyledons. (e). The hypocotyl is the embryo plant below the attachment of the cotyledons.