1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
loris [4]
4 years ago
9

What percentage of all living things that have ever existed on

Biology
2 answers:
Ratling [72]4 years ago
8 0

D. 99% of all living things that have ever existed are now extinct

prisoha [69]4 years ago
5 0

<u>Answer:</u>

The correct answer option is d. 99 percent.

<u>Explanation:</u>

Extinction is the term used for the termination of any organism or of a group of organisms which are commonly called as species.

Death of organisms or a species results in their extinction. Out of all over five billion species that have ever existed on the earth, about 99 percent have already gone extinct.

While the current number of species that exist on earth have reduced to a range of 10 million to 12 million.

You might be interested in
Sorry I am not that smart like y’all
KengaRu [80]

Answer:

remains

Explanation:

6 0
4 years ago
Students placed their eggs in vinegar, a mild acid. The egg shells disappeared overnight. Based on the passages description of w
SCORPION-xisa [38]
It is A: a chemical reaction, due to the acid activity (acetic acid)
3 0
3 years ago
Name one example of an enzyme in the human body and it's function.
Art [367]

Answer:

A couple of examples

<u>amylase</u>: break down starch into sugar.

<u>protease</u>: break down proteins into amino acids.

<u>lipase</u>: break down lipids (fats and oils) into fatty acids and glycerol.

3 0
3 years ago
The cilia and mucus in the trachea sweep upward, moving the mucus toward the nose where it is sneezed out. ________
Mumz [18]
Hello there :)

I am quite sure this is a true/false question

This statement is false.
Yes, the cilia and mucus in the trachea does sweep upward, however, it moves the mucus towards the pharynx where it is swallowed not towards the nose where it is sneezed out.
5 0
3 years ago
Eggs have species specific receptors on their outer surfaces to which sperm must attach if fertilization is to occur
mafiozo [28]
The  question is; would a drug that binds irreversibly to these receptors be an effective contraceptive in mammals?, the answer is;Yes; because if the receptors are blocked the sperms will not be able to penetrate the zonal pellucida of the egg.  Contraceptives prevents pregnancy by interfering with the normal process of ovulation, fertilization, and implantation.
6 0
4 years ago
Other questions:
  • When you hit your elbow and say that you hit your "funny bone," you have actually hit a nerve that runs across the bone surface.
    8·1 answer
  • Who is good at biology and that can help me??????
    12·1 answer
  • What is a word that means something made up of water land and atmosphere
    14·1 answer
  • A group of students is investigating whether silver is a better thermal conductor than copper. The students take a silver wire a
    11·1 answer
  • The flu virus mutates very easily due to its core made of RNA. This type of virus is called a(n) ...
    11·1 answer
  • Why do we have to secure the inflated balloon
    8·2 answers
  • Digesting food is an example of
    13·2 answers
  • DNA is always tuned on all the time in all of your cells true or false
    5·2 answers
  • If spindle microtubules fail to bind some kinetochores in meiosis, then most likely: _____________
    9·1 answer
  • One difference between plant and animal cell is that plant cells have
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!