A large canopy tree falls in a deciduous forest in Great Smoky Mountains National Park, opening a gap in the forest canopy. The drier, warmer, sunlit environment thus created is favorable to establishment of successional tree species. Whenever deaths of individuals alter the environment, as in this example, the result is what ecologists refer to as a __________ pattern.

A) primary
B) secondary
C) catastrophic
D) mosaic


Ans: D) mosaic

Biology & Microbiology

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A zygote is:

A. haploid. B. diploid. C. polyploid. D. monoploid.

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List four lines of evidence that support a link between cancer and genetics. Describe the ultimate cause of cancer and how an individual's life-style might reduce the chances of developing cancer

What will be an ideal response?

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A coccus is a(n) ____

a. rod-shaped bacterium b. spherical bacterium c. multicellular bacterial colony d. spiral-shaped bacterium

e. bacteriophage

Biology & Microbiology

The lymphatic system plays a role in defending the body against pathogens and maintaining a state of homeostasis.

Answer the following statement true (T) or false (F)

Biology & Microbiology