What is the approximate size of the human population today?
A. 7 billion people
B. 2 billion people
C. 5 billion people
D. 10 billion people
E. 25 billion people
A
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Even before organs begin to form, rudimentary forms of bone begin to form in a fetus due to _____________.
A) the breakdown of hyaline cartilage. B) the formation of secondary ossification sites. C) the activity of chondroblasts. D) the formation of an osteoclast. E) the activity of growth hormone.
Which type of protist lives in the digestive tracts of termites and cockroaches playing a key role in cellulose digestion?
a. pathogenic plasmodia b. photosynthetic dinoflagellates c. anaerobic parabasalids d. enteric excavata
_____ studies how disease originates and spreads throughout a population, with the goal of preventing outbreaks and containing them when they do occur.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a characteristic of continuous variation?
A. Traits can be quantified by measurement. B. Only a single gene pair contributes to the phenotype. C. The effect of each additive allele is small. D. Phenotypes show wide variation in expression. E. All of these are characteristics of continuous variation.