Most representatives of the phylum Porifera gain nutrition as:
A. parasites.
B. predators.
C. autotrophs.
D. herbivores.
E. suspension feeders
E
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The closest living relatives of birds are ____
a. mammals b. lizards c. turtles
d. crocodiles e. amphibians
Robert Hooke first used the term cell in 1665. However, nearly 200 years passed before scientists developed the cell theory. Why did it take so long between the first use of the term cell and the development of the cell theory?
A) The development of the cell theory depended on scientists first developing the germ theory of disease. B) Scientists were more interested in studying the relationship of organisms to their environment rather than their structure. C) Microscopes were not available for scientists to study the cellular structure of organisms. D) Scientists had to make many observations of various organisms before they could establish a theory.
Darwin was the first person to draw an evolutionary tree, a diagram that represents
A) records of breeding in domesticated animals. B) records of lineages in humans (also known as a family tree). C) evidence-based hypotheses regarding our understanding of patterns of evolutionary descent. D) groupings of organisms based on overall similarity.
In the Hardy-Weinberg Frequency p^2 represents __________.
a. homozygous dominant b. heterozygous c. homozygous recessive d. the entire population