What is meant by the term keynote species? Explain why it is important to issues of biodiversity and extinction
What will be an ideal response?
A keynote species is a species whose survival is essential to the success of the ecosystem as a whole. If keystone species go extinct, it threatens the health and viability of the entire ecosystem.
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Spring tides occur when
A) the Moon's gravitational attraction is perpendicular to the Sun. B) Earth, the Moon, and the Sun are all aligned. C) the Moon and the Sun exert forces on Earth at a 45° angle. D) the Moon and the Sun exert forces on Earth at a 60° angle.
Most precipitation from thunderstorms originates through the collision-coalescence process
Indicate whether the statement is true or false
Which of the following is true of most abundant, naturally occurring, unsaturated fatty acids?
A) The cis isomer predominates. B) The trans isomer predominates. C) There is an approximately equal distribution of cis and trans isomers. D) Depending on the fatty acid, the distribution of cis and trans isomers will vary.
This country is the least densely populated country in the Latin American region
a. Falkland Islands b. Aruba c. Grenada d. St. Lucia