HELP ASAP 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 phrase from the text best describes scientists' problem making predictions about undiscovered species? (1 point)
Is it A, B,C or D

A. Categorized and listed 1.2 million
B. Predictions vary so greatly
C. A lot of diverse species
D. Scientists have agreed

For each of the following, mark whether it is a possible confounder (a factor that mixes up the results, making it look like candy is to blame when it's a causal (or causation) link which supports the argument that candy causes criminal behavior (ie, explains how candy leads to criminality ), or neither (an irrelevant factor, something that may cause people to become criminals but has nothing to do with eating candy). choose your answers based only< on the information given. additives in candy- additives found in candy may adversely affect brain development of young children in ways that could contribute towards adult aggression. impulsive personality-- kids who are highly impulsive and have trouble delaying gratification are more likely to eat candy every day as children and more likely to disobey laws as adults. violent abuse-- children who suffer violent abuse are more likely to become violent adults and commit violent crimes. gender- boys are overwhelmingly more likely to commit violent crimes

Choose all that apply. which of the following is characteristic of a rural lifestyle? slow-pacedmany deadlineshigh level of stressclose families

Consider the speakers in "the raven" and the speaker in "the song of wandering aengus." write two paragraphs to compare and contrast the voice in these two poems. how does the poet give the speaker in each poem a distinctive voice? what effect does this voice have in each poem? use examples from each poem to as evidence for your answer "the raven"once upon a midnight dreary, while i pondered, weak and weary, over many a quaint and curious volume of forgotten lore—while i nodded, nearly napping, suddenly there came a tapping, as of some one gently rapping, rapping at my chamber door.“‘tis some visitor,” i muttered, “tapping at my chamber door—only this and nothing more.”ah, distinctly i remember it was in the bleak december, and each separate dying ember wrought its ghost upon the floor. eagerly i wished the morrow; —vainly i had sought to borrowfrom my books surcease of sorrow—sorrow for the lost lenore—for the rare and radiant maiden whom the angels name lenore—nameless here for evermore. and the silken sad uncertain rustling of each purple curtainthrilled me—filled me with fantastic terrors never felt before; so that now, to still the beating of my heart, i stood repeating“‘tis some visitor entreating entrance at my chamber door—some late visitor entreating entrance at my chamber door; this it is and nothing more.”"the song of wandering aengus." i went out to the hazel wood, because a fire was in my head, and cut and peeled a hazel wand, and hooked a berry to a thread; and when white moths were on the wing, and moth-like stars were flickering out, i dropped the berry in a streamand caught a little silver trout. when i had laid it on the floori went to blow the fire aflame, but something rustled on the floor, and some one called me by my name: it had become a glimmering girlwith apple blossom in her hairwho called me by my name and ranand faded through the brightening air. plz hurry