A heme group contains four pyrrole rings, which are linked via methene (methine) bridges.

How does the removal of top predators affect mesopredator populations? a. the geographic range and abundance of mesopredators decline. b. mesopredator populations remain unchanged. c.

Which of the following is most likely true about isopods? A. They have four different kinds of legs. B. They have short and skinny front legs. C ... None of their legs are the same width. D. All their legs have similar size and shape.

7. What difficulties may a person experience, with everyday tasks, if they are colorblind? Be specific and provide examples.

In many cells, the adhesion to the extracellular matrix through integrins causes the activation of kinases in the cytoplasm. This suggests that: a. integrins promote the activation of signal-transduction pathways. b. integrins are kinases. c.

Which of these materials do your cells need more of during exercise? why?

The failure of homologous chromosomes to separate during meiosis is called a. skin disorders b. translocation. c. nondisjunction. d. Down syndrome.

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

The most obvious source of gene flow into any population is A) Emigration B) Immigration

Polypeptides and proteins must fold properly to be functional. Hydrogen bonds between the oxygen and nitrogen atoms of the peptide bonds are crucial to which level of protein structure?1. primary structure2. tertiary structure3. secondary structure4.

A particular gene can have two forms, called alleles. which statement best describes the difference between the dominant allele and the recessive allele? (a) only the recessive allele is expressed when both alleles ate inherited.