Which one of the following would provide the most calories?
a. 2 grams of salt
b. 3 grams of butter
c. 4 grams of sugar
d. 5 grams of hamburger
B
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Organisms that can grow without oxygen are called ______.
a. anoxyic b. phototrophs c. anaerobes d. cyanobacteria
The Central Dogma describes the flow of genetic information as
A) Protein—RNA—DNA. B) DNA—RNA—Protein. C) RNA—DNA—Protein. D) DNA—Protein—RNA.
Who is credited for discovering cells?
A. Anton van Leeuwenhoek B. Francis Crick C. Charles Darwin D. Joseph Farman E. Robert Hooke
During the late 1800s, cattle egrets arrived in South America from Africa and began to colonize. Their range has expanded dramatically over the years. Why were they able to do this?
A. The habitats that they left in Africa were not suitable for any further colonization; thus, they were forced to emigrate. B. The habitats that they encountered in South America were suitable to them and unoccupied. C. The food resources in South America were far superior to those in Africa, allowing the egrets more opportunity to grow and reproduce and ultimately expand their range. D. There were abundant cattle for the birds to gather around in South America; furthermore, various animals that the egrets had lived around in Africa had become quite scarce because of over hunting and poaching, causing the birds to extend their range.