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
Karolina [17]
3 years ago
9

A barrier that allows some substances in while keeping other

Biology
1 answer:
egoroff_w [7]3 years ago
5 0
C cause it let certain type particles to move threw
You might be interested in
All movement are locomotion but not all locomotion are movement​
Vladimir [108]
Some may assume that movement and locomotion are the same, but these two words have certain differences. Movement is known to be the time when a living organism will move from one place to another. Locomotion means that the movement that the living organism did has made changes to the current position of the organism.
7 0
3 years ago
“A food chain or food web shows the flow of energy and matter though an ecosystem. Which organisms use the sun’s energy and make
Anuta_ua [19.1K]
The plant is the organism that uses the sun’s energy and make it available to other organisms
4 0
3 years ago
Hemoglobin is a protein that binds to oxygen. It is only produced by red blood cells and it allows blood to transport oxygen thr
tamaranim1 [39]

Answer:

That hemoglobin is the substance that transports oxygen..

6 0
2 years ago
Genetically speaking, as you head down
Delicious77 [7]

Answer:oh wow

djdjdksdkks

Explanation:

...

7 0
3 years ago
What happens at the ribosome?
Misha Larkins [42]
Pretty sure the answer is A
6 0
3 years ago
Other questions:
  • How do scientists determine when an era ends and an era begins
    8·1 answer
  • An energy pyramid is a graphical model of energy flow in a community. The different levels represent different groups of organis
    14·1 answer
  • While Maria's mom has small ears (alleles ee), her dad has large ears (alleles EE). What are the possible phenotypes Maria would
    13·1 answer
  • A 54-year-old woman with a history of osteoporosis has been prescribed ciprofloxacin for recurrent cystitis. because of the pati
    5·2 answers
  • Which of the following is NOT a characteristic that all living things share? A) a cellular organization B) using energy C) movem
    10·2 answers
  • Which is a following is an example of a complex carbohydrate?
    10·1 answer
  • A hypothesis is an educated guess about the relationship between
    15·1 answer
  • Explain how ATP can be compared to a rechargeable battery.
    6·1 answer
  • Based on the pedigree that is shown, which describes John? carrier for hemophilia expresses hemophilia does not have hemophilia
    10·2 answers
  • Which action best demonstrates the transformation of mechanical energy to heat energy and sound energy? (10 points)
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!