Corals in a tropical reef provide protection from ocean waves and currents to the other species that live there and have the greatest influence on the reef community. The corals are a(n) ______ species.
a. invasive
b. foundation
c. pioneer
d. keystone
b. foundation
The corals are a foundation species. Corals in a tropical reef provide protection from ocean waves and currents to the other species that live there and have the greatest influence on the reef community.
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During which period did the coal forests form?
a. Cambrian b. Carboniferous c. Quaternary d. Jurassic e. Ordovician
If you were designing a new insecticide absorbed via the respiratory system in arthropods, the killing chemical would enter the invertebrate through the
A. epidermis. B. tracheae. C. alveoli. D. bronchioles. E. gills.
The semen from a man who has had a vasectomy would include each of the following except ________
A) secretions from the prostate gland B) secretions from the seminal vesicles C) sperm D) secretions from the bulbourethral glands
Membrane-bound vesicle that contains hydrolytic enzymes for digesting macromolecules and bacteria; used to recycle worn-out cellular organelles.
What will be an ideal response?