The developmental stage represented in the accompanying figure is a(n):
a. morula.
b. early blastula.
c. late blastula.
d. early gastrula.
e. middle gastrula
e
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The stage of viral replication in which the virus binds a cell surface receptor is
A. release. B. attachment. C. assembly. D. penetration. E. synthesis.
Eating as little as ___ grams of trans fats can
increase a person’s risk for a variety of diseases.
a. one b. two c. three d. four e. five
When Mendel crossed short (tt) pea plants with short (tt) pea plants the offspring
a) were all tall. b) were a mix of tall and short. c) were nonexistent. d) None of the answers are correct. e) were all short.
As a result of global warming,
A) forests are expanding in range. B) there are greater extremes in weather patterns. C) the ozone layer is becoming thicker. D) species are becoming active later in the spring. E) species' ranges are shifting toward the equator.