A student needs information from the National Institutes of Health, a government agency. Which one of the following endings should he or she look for in the Internet address?

A) edu
B) com
C) gov
D) nih
E) org


C

Biology & Microbiology

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Insects exchange gasses through pores called _____, which connect to an internal system of tubes called _____, which are in turn connected to respiring tissues

A. spiracles; tracheae B. tracheae, spiracles C. spiracles; radulae D. radulae; tracheae E. none of these

Biology & Microbiology

Based on the principle of parsimony, which species shares a most recent common ancestor with a species having the sequence TTACC?

Consider the following DNA sequences for four different species: 1: AATCG 2: TAATG 3: ATACC 4: ATAGG A. Species 1 B. Species 2 C. Species 3 D. Species 4

Biology & Microbiology

To account for variations in the evolutionary rates at different genetic loci, the ____ compares alternative trees

reflecting differentrates of evolutionary change tto identify the best evolutionary path

a. punctuated equilibrium hypothesis b. gradual phyletic hypothesis c. traditional systematic method d. principle of parsimony e. maximum likelihood method

Biology & Microbiology

The Masai people of Kenya, in east Africa, regularly consume the blood and milk of their cattle. The cattle derive a net benefit because the Masai also protect them from predators and help them find water and food

Based on this information, the relationship between the Masai and cattle is best classified as A) predation. B) mutualism. C) coevolution. D) competition. E) parasitism.

Biology & Microbiology