Sheaths of the bacterium Sphaerotilus are tubelike structures that are in intimate contact with the chain of cells that they enclose.
Answer the following statement true (T) or false (F)
False
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Which two animals are both classified as suspension feeders?
a. clams and aphids b. clams and fiddler crabs c. lampreys and rabbits d. lampreys and rabbits e. whales and clams
Most likely, which of the following would not be an example of a limiting resource?
a. temperature in a terrestrial habitat b. mineral content of the soil c. amount of precipitation d. salinity in an aquatic habitat e. growth rate
The processes of synapsis and the formation of chiasmata
a. involve reciprocal exchange of chromosomal sections. b. involve the recombination of DNA on homologous chromosomes. c. bring about an increase in genetic variation. d. provide evidence that an exchange of genetic material has occurred. e. All of the above
Genetic variations in natural populations develop due to
A) individual activities. B) environmental catastrophes. C) changes in the environment. D) random mutations of the DNA. E) changes in diet.