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Jlenok [28]
3 years ago
15

Need help please and thanks

Biology
1 answer:
ziro4ka [17]3 years ago
6 0

Answer:e

Explanation:

yep

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Every year _______ species go extinct. a. 3 b. 72 c. 1000 d. 20000 please select the best answer from the choices provided
Galina-37 [17]

The experts calculate that between 0.01 and 0.1% of all species will become extinct each year. If the low estimate of the number of species out there is true - i.e. that there are around 2 million different species on our planet - then that means between 200 and 2,000 extinctions occur every year.

What is extinction?

  • Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species.
  • The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence.
  • More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out.
  • It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, mammoths, ground sloths, thylacines, trilobites and golden toads.
  • Through evolution, species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche and species become extinct when they are no longer able to survive in changing conditions or against superior competition.
  • The relationship between animals and their ecological niches has been firmly established.
  • A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive with little to no morphological change for hundreds of millions of years.

To learn more about extinction: brainly.com/question/14482178

#SPJ4

7 0
2 years ago
What muscle is commonly injured while sleeping?
wlad13 [49]

Answer:

Explanation:

If you sleep on your back, a pillow that is too thick can strain the curvature of your spine and your neck muscles. If your pillow is too thin, side-sleeping can strain the muscles on the side of your neck

7 0
3 years ago
Which of the following IS a symptom of cataracts?
astra-53 [7]
Answer:
All of the above

7 0
3 years ago
How many chromosomes are visible at the beginning of mitosis?
alexandr402 [8]
There are 4 chromosomes that are visible at the beginning of Mitosis.  
6 0
3 years ago
​The ____ monitors all the information about eye, head, and body positions and passes it on to brain areas that control movement
aleksandr82 [10.1K]

Answer: Parietal lobe  

Explanation:

The parietal lobes are one of the four main lobes of the cerebral cortex. It is positioned  above the temporal lobes and behind the frontal lobes.

These lobes serves many important functions such as functioning and processing of the sensory information, body's awareness and spatial orientation.

This lobe processes the information about eye, head and body position.

Hence, the correct answer is parietal lobe.

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