Which phylum of vascular, seed-bearing plants includes pines, spruces, and firs?
a. Gnetophyta
b. Cycadophyta
c. Ginkgophyta
d. Coniferophyta
Ans: d. Coniferophyta
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From the outside of a tree to its center, which
of the following is the correct order of appearance? 1. periderm 2. vascular cambium 3. sapwood 4. seconary phloem 5. cork cambium 6. heartwood
a. 1-2-4-5-6-3 b. 1-5-4-2-3-6 c. 1-4-5-2-6-3 d. 1-3-2-5-4-6 e. 1-2-4-5-3-6
Which of the following statements is false
regarding alcohol consumption during pregnancy? a. The developing embryo or fetus quickly absorbs alcohol across the placenta. b. Symptoms of fetal alcohol syndrome include reduced brain size and facial deformities. c. Cases of FAS are seriously underdiagnosed and misdiagnosed. d. The effects of FAS are temporary. e. Even occasional drinking may have negative effects
Measurements of bill length in a population of seed-eating birds reveals two distinct groups: small-billed individuals feeding on soft-shelled seeds and large-billed individuals feeding on hard-shelled seeds
This bimodal distribution most likely resulted from A) stabilizing selection. B) natural selection. C) directional selection. D) disruptive selection.
A population that differs significantly from other populations of the same species is known as a
A. breed. B. subspecies. C. variety. D. All of these answers are true.