A codon is a group of three bases that can specify more than one amino acid.
a. true
b. false
Answer: b. false
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Processed pseudogenes are useful for testing Darwin's theory of descent with modification because they ________
A) can be utilized for examining phylogenetic relationships among asexually reproducing organisms B) demonstrate phylogenetic relationships of divergence because they do not accumulate mutations C) accumulate mutations at a constant rate, and thus older processed pseudogenes should be shared by a greater variety of species D) are distributed in organisms that are found in similar environments
Contraction of skeletal muscle is caused by the release of neurotransmitters from ________ neurons
Fill in the blank(s) with correct word
Which of the following is NOT true of sclerenchyma tissue?
A) It is made up of cells with thickened cell walls. B) It is a storage site for sugars and starches. C) It is associated with xylem and phloem in the vascular tissue system. D) It dies at maturity. E) It provides support to strengthen the plant.
If a female orchid bee has just left a Brazil nut tree with nectar in her stomach, and if she visits another flower on a different Brazil nut tree, what is the sequence in which the following events should occur?
1. double fertilization 2. pollen tube emerges from pollen grain 3. pollen tube enters micropyle 4. pollination A) 4, 2, 3, 1 B) 4, 3, 2, 1 C) 2, 4, 3, 1 D) 2, 4, 1, 3