Who was the first person to describe living cells?
A) Schleiden
B) Hooke
C) Leeuwenhoek
D) Schwann
E) Virchow
Ans: C) Leeuwenhoek
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Darwin inferred that those organisms with traits best suited to the environment tend to leave more --- than other members of a population
Fill in the blank(s) with the appropriate word(s).
Most marine invertebrates are osmoconformers. This means that
A. that their body fluids contain the exact same solutes in the same concentration as their cells. B. that their body fluids contain the exact same solutes in the same concentration as their surroundings. C. the osmolarity of their body fluids is the same as their seawater environment. D. the osmolarity of their body fluids fluctuates between hypertonic to hypotonic depending on the season and the tides. E. the osmolarity of their body fluids is equal to that of the osmoregulators who inhabit the same environments.
Red foxes eat a wide variety of plants and animals, so we would say they are ________
A) carnivores B) parasites C) omnivores D) producers
Which of the following microbes has been genetically engineered to contain a protein that helps protect crops from freezing?
A. Deinococcus radiodurans B. Bacillus thuringiensis C. Pseudomonas D. Salmonella E. Escherichia coli