Which of the following is not true of estuaries?
a. The organisms living there are often tolerant of large fluctuations in salinity.
b. They are nursery grounds for many fish species.
c. Temperatures can vary widely.
d. They are the least productive of aquatic habitats.
e. They are found where rivers dump into oceans.
D
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Leptospirosis is often contracted
A. by eating infected animals. B. by eating contaminated vegetables. C. from contaminated animal urine. D. by the respiratory route.
Which trait of ferns makes them well adapted to both forest floors and inside buildings?
a. ability to grow in sandy soil b. preference for dry climates c. tolerance for low light conditions d. a pleasant smell resembling licorice
Scientists have found that extracellular matrix components may induce specific gene expression in embryonic tissues such as the liver and testes
For this to happen there must be direct communication between the extracellular matrix and the developing cells. Which kind of transmembrane protein would most likely be involved in this kind of induction? A) integrins B) collagens C) actins D) fibronectins
A cell can only respond to signals from other cells, not from the physical environment.
a. true b. false