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
Alchen [17]
3 years ago
7

Which molecules may diffuse across a cell membrane without the expenditure of energy or the use of membrane proteins?

Biology
1 answer:
wel3 years ago
6 0

Explanation:

In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins, glucose and charged particles called ions cannot pass through the selectively permeable membrane

You might be interested in
PLEASE HELP PLEASE PLEASE PLEASE BRAINLIEST TO RIGHT ANSWER
Elden [556K]

Answer:

albinism is the answer.

8 0
2 years ago
Read 2 more answers
Identify which type of study the following example describes.
Travka [436]

Answer:

They are training animals in a maze and recording physiological changes in their brains, Stimulating a brain structure and recording subsequent changes in movement, Introducing two adults that are potentially attracted to each other, and then measuring their sex hormone levels, Measuring the brain volumes and intelligences of people in a group, Observing enlarged cerebral ventricles in the brains of many people with schizophrenia, Severing the connections between visual regions and the rest of the brain in animals, and observing the animals’ failure to recognize an object, and Studying the relationship between a sex hormone treatment and strength of an animal’s mating behavior.

Explanation:

7 0
3 years ago
Is plankton biotic or abiotic?
faust18 [17]

Answer:

Explanation:

Not only is the biota important, but the abiotic factors in the ocean are also important because both groups work together. The abiotic factors in the ocean help the ocean to 'work'. For example, phytoplankton (autotrophs) need light, nutrients, CO2 (dissolved gases) to photosynthesize.

4 0
2 years ago
Read 2 more answers
What is the difference between directional selection and disruptive selection
morpeh [17]
Directional selection is where one phenotype is favored, so an example would be "a population of madagascar hissing cockroaches suffers heavy predation from lizards. Because their heads are small, the lizards are unable to eat the very largest adult cockroaches, and instead prey upon small and medium sized adults, so as a result the large cockroaches are favored and live". 
Meanwhile, disruptive selection is where both extreme phenotypes are favored, an example would be "a population of rabbits can have black fur, white fur or grey fur. This population of rabbits lives in an area of white rocks. When a local volcano erupts, black volcanic rock now dots the landscape amongst the white rocks. Now the black and white rabbits live longer because the black and white spots on the landscape camoflauge them. The two extreme phenotypes are being favored."
8 0
2 years ago
What is the scientific name for humans
Over [174]
<span>The answer to your question is Homo sapiens.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which structures in the diagram are composed of RNA?
    10·1 answer
  • What is the minimum number of nanocontainers that a person would need in their bloodstream to provide 1 hour's worth of oxygen?
    11·1 answer
  • Which of the following are symptoms of encephalitis? a. pain behind the eye c. joint and muscle pain b. inflammation of the brai
    15·1 answer
  • Over time adaptions can lead populations to experience
    7·1 answer
  • Which level of organization is pictured?
    12·2 answers
  • He diagram shows a straight chain of glucose molecules.
    12·1 answer
  • Glomerular filtration only filters waste out of the blood.<br> O A.<br> True<br> B.<br> False
    15·1 answer
  • QUESTION 8
    9·1 answer
  • When testing fertilizer on a tomato farm, one patch of soil is given fertilizer
    7·1 answer
  • Which type of cell attacks a variety of unwanted cells and causes those cells to undergo apoptosis?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!