If an energy pyramid tapers toward the top, what does it tell you about the biomass at the highest trophic level?

In sexual reproduction, what fraction of genes does each parent contribute to the offspring? 1/2 3/4 1/3 1/4

A 47-year-old woman was diagnosed with amyotrophic lateral sclerosis 3 years ago and has experienced a progressive onset and severity of complications.

A child inherits genes with the genotype: ww and Ww. What are the chances that he will have a widow's peak?

In the development of dogs, monkeys and dolphins, nourishment and oxygen are provided by the mother to the fetus through the A. excretory system. B. cloaca. C. placenta. D. both (B) and (C).

According to the endosymbiotic hypothesis, why did the large cells not destroy the small aerobic cells they engulfed? A. because they were so tough B. because they provided energy C. because they were parasites not food D.

Based on the data you collected, who likely left the the classroom mess? Justify your answer.

A drug that constricts blood vessels would have which of the following effects?

What hypothesis did Griffith form from the results of his experiments?

Which of the following is true of microbes? A. Ninety-nine percent of all microbes are pathogenic. B. Gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and

What is one differnce between primary and secondary succession