Which of the following would be a characteristic of an exotic plant species?
A. Produces a few seeds after many years to reach maturity
B. Has many predators and diseases
C. Is a specialist, for example, has a low range of tolerance for soil acidity
D. Is an opportunist that is desired by humans for food or ornamental value
E. Is a secondary consumer (trophic levels)
Answer: D
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How do worms help plants grow?
A. They carry out chemical reactions that convert carbon dioxide to nitrogen. B. They add excrement, a source of nutrients, plus they produce air space by crawling through the soil. C. They are a source of minerals. D. They decompose organic material into compounds plants can use.
The Mesozoic Era is called the “Age of Reptiles” because ____
a. there were more reptiles than any other type of animal b. reptiles were the only animals to show evolutionary change c. even though there were more plants than reptiles, plants did not evolve d. reptiles predominated the land-dwelling vertebrate animals e. reptiles dominated the oceans
The earliest crust is thought to be high density, unstable mafic rock. Indicate whether the statement is true or false
Most people agree that global climate change is not a real environmental threat.
Answer the following statement true (T) or false (F)