Science Mysteries: How Many Species Are There? You might think that after 200 years, the scientists who find, name, and describe Earth's species would be close to finished. But taxonomists, as organized as they may be, have no idea how many species Earth has. Nor can they even provide an educated guess. Although reporting over 16,000 new species every year, taxonomists still cannot predict how many more are undiscovered. In total, taxonomists have categorized and listed 1.2 million species on Earth. At this point, you would think scientists should be able to use the information they have gathered to make good predictions about how many species an ecosystem can support. This would help them make better predictions about how many species are left to identify. So far, however, the guesses seem to vary so greatly that it seems there is no good theory for making a prediction. One of the main problems is that most of the places that seem to have a lot of diverse species are in places that are hard to get to. One such place is the ocean, where scientists believe some 80 percent of Earth's creatures are hiding at depths too deep for us to study. In addition, many of the planet's most diverse areas are in remote places with few taxonomists. Despite all the unknowns, scientists have agreed that there are between five and 15 million species left to discover on Earth. This is a huge range, but whether it's five or 15, taxonomists clearly still have a lot of work to do. And who knows, there may yet be a dragon or a Loch Ness monster left to discover.
Which line from the text explains the main idea of the entire essay? (1 point)
A. Scientists have agreed that there are between five and 15 million species left to discover.
B. Taxonomists still cannot predict how many more are undiscovered.
C. Taxonomists have categorized and listed 1.2 million species on Earth.
D. This would help them make better predictions about how many species are left to identify.

Answer:

D. This would help them make better predictions about how many species are left to identify.

Explanation:

axonomists clearly still have a lot of work to do. And who knows, there may yet be a dragon or a Loch Ness monster left to discover.

Which line from the text explains the main idea of the entire

"This would help them make better predictions about how many species are left to identify." are the lines in the above paragraph which explain the main idea of the entire essay. Option (d) is correct.

A group of creatures that can breed with one another in nature and create healthy it was considered as the most fundamental unit of classification in biology is the species, which also serves as a taxonomic rank.

It is obvious that axonomists still have a lot of work to do. And who knows, perhaps there is still a dragon or Loch Ness monster to be found. He diversity of living organisms on Earth, including plants, animals, microbes, and fungi, is referred to as biodiversity. The Earth's biodiversity is so diverse that many species are still undiscovered, but because of human actions, many species are facing extinction, endangering the Earth's amazing biodiversity.

Therefore, option (d) is correct answer for the above context that "This would help them make better predictions about how many species are left to identify." are the lines in the above paragraph which explain the main idea of the entire essay.

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What is the gerund phrase in this sentence?


a: the goofball award


b: laugh constantly


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Excerpts from The True Confessions of Charlotte Doyle, copyright © 1990 by Avi. Used by permission of Brandt and Hochman Literary Agents, Inc. All rights reserved.

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Read the excerpt from Justice Curtis’s dissenting opinion, then answer the question that follows.

Slavery, being contrary to natural right, is created only by municipal law. This is not only plain in itself, and agreed by all writers on the subject, but is inferable from the Constitution, and has been explicitly declared by this court. The Constitution refers to slaves as “persons held to service in one State, under the laws thereof.” . . . .

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Justice Benjamin Curtis

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“The Constitution refers to slaves as ‘persons held to service in one State’”
“The Convention which framed the Constitution . . . has . . . the power to regulate commerce.”
“A citizen of the United States owns slaves in Cuba.”
“Does this legislation deprive him of his property without due process of law?”
“Acts of Congress as prohibited slavery and involuntary servitude within that part of the Territory of Wisconsin . . . were constitutional and valid laws.”

HINT: THERE ARE ONLY 2 CORRECT ANSWERS

A word element that is attached to the end of a word to change its meaning is called a:
a.
Prefix
c.
Suffix
b.
Affix
d.
Base


Please select the best answer from the choices provided

A
B
C
D

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