What do Margalef's and Menhinick's indices have in common?
A) Both indices are measures of heterogeneity.
B) Both indices normalize species richness in relation to the size of the sample.
C) Both indices normalize species richness in relation to latitude.
D) Both indices quantify the compositional similarity of two samples.
E) Both indices were used by Darwin, Bates, and Wallace to quantify tropical diversity.
Ans: B) Both indices normalize species richness in relation to the size of the sample.
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Which of the following statements is true regarding Wolbachia bacteria?
A. Wolbachia co-evolved with insects. B. Wolbachia can selectively kill male insect embryos. C. Wolbachia can convey Dengue-resistance in insects. D. Wolbachia can affect the reproductive structures of its insect hosts. E. All of these statements about Wolbachia are true.
Ammonia released by fertilizers and animal wastes affect the environment by ____.
A. combining with sulfur and nitrogen oxides in the air to form salts that end up fertilizing the ground B. degrading into nitrites and completing the nitrogen cycle C. poisoning rivers and lakes D. acidifying oceans E. accumulating in animal bodies
Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. Which of the following describes the genotypes of the parents?
A) One is homozygous recessive for the CF gene, and the other is heterozygous. B) They are both heterozygous for the CF gene. C) They are both homozygous dominant for the CF gene. D) One is homozygous dominant for the CF gene, and the other is heterozygous. E) They are both homozygous recessive for the CF gene.
When energy flows from one trophic level to another, only a small amount is actually used. Which of the following uses of energy by an organism allows for the least amount of transfer to a different trophic level?
A. growth B. excretion C. cellular respiration D. death E. reproduction