The Osteichthyes, or bony fish, make up about half of vertebrate species diversity. Their success is due to a combination of adaptations that include (select all that apply):
A. mobile jaws for specialized feeding.
B. kidneys that allow fine regulation of water
balance.
C. lungs modified from swim bladders.
D. metamorphosis allowing them to occupy
distinct niches as juveniles and adults.
E. paired, fleshy pectoral and pelvic fins.
A,B
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Aminoacyl-tRNA synthetase catalyzes the reaction between the appropriate amino acid and ATP to form an activated amino acid: amino acid + ATP ? aminoacyl-AMP + P-P
Indicate whether the statement is true or false.
Science is subdivided into specific areas of study termed disciplines. These divisions are artificial but are helpful to narrow the massive scope of scientific knowledge to a manageable amount. Given what you know about each, which scientific division is likely to present the best answer to a question about how fluid dynamics affect blood pressure in mammals?
A. Bioinformatics – use of technology to study and store biological data B. Biochemistry – study of chemical reactions needed for life function, usually at the cellular level. C. Biology – study of life D. Biophysics – study of biological processes through physics
In 1882, the tropical volcanic island Krakatoa
exploded and was reduced to an abiotic island covered by a thick layer of volcanic ash. By 1933, populations of all of the following organisms were present. Which population was probably established after the others? a. ferns b. bacteria c. insects d. rodents e. mosses
In the food chain grass ? antelope ? human ? lion, the human is a ________
A) tertiary consumer B) secondary consumer C) primary consumer D) producer