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
Verizon [17]
3 years ago
13

The section of the cell membrane illustrates one method of cellular transport. Consider steps A, B and C. What transport mechani

sm is represented by the model?

Biology
1 answer:
andrezito [222]3 years ago
3 0
The model attached represents facilitated transport, which is answer choice D. In the model, there are protein channels, which allow molecules to pass through them if they're too large to fit through the aquaporins (making diffusion an incorrect answer.) We can eliminate active transport since ATP isn't used to control transport, and we can eliminate endocytosis as it is a form of active transport. The remaining answer would be facilitated transport, which is a form of passive transport. Hope this helps! :)
You might be interested in
Which of the following is a benefit of dams?
Nitella [24]
A. They impede fish migration and spawning
5 0
3 years ago
Fermentation is an anaerobic biochemical pathway with truly one simple intent.
larisa86 [58]

Answer:

We are losing Earth's greatest biological treasures just as we are beginning to appreciate their true value. Rainforests once covered 14% of the earth's land surface; now they cover a mere 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.

One and one-half acres of rainforest are lost every second with tragic consequences for both developing and industrial countries.

Rainforests are being destroyed because the value of rainforest land is perceived as only the value of its timber by short-sighted governments, multi-national logging companies, and land owners.

Nearly half of the world's species of plants, animals and microorganisms will be destroyed or severely threatened over the next quarter century due to rainforest deforestation.

Experts estimates that we are losing 137 plant, animal and insect species every single day due to rainforest deforestation. That equates to 50,000 species a year. As the rainforest species disappear, so do many possible cures for life-threatening diseases. Currently, 121 prescription drugs sold worldwide come from plant-derived sources. While 25% of Western pharmaceuticals are derived from rainforest ingredients, less that 1% of these tropical trees and plants have been tested by scientists.

Most rainforests are cleared by chainsaws, bulldozers and fires for its timber value and then are followed by farming and ranching operations, even by world giants like Mitsubishi Corporation, Georgia Pacific, Texaco and Unocal.

There were an estimated ten million Indians living in the Amazonian Rainforest five centuries ago. Today there are less than 200,000.

In Brazil alone, European colonists have destroyed more than 90 indigenous tribes since the 1900's. With them have gone centuries of accumulated knowledge of the medicinal value of rainforest species. As their homelands continue to be destroyed by deforestation, rainforest peoples are also disappearing.

Most medicine men and shamans remaining in the Rainforests today are 70 years old or more. Each time a rainforest medicine man dies, it is as if a library has burned down.

When a medicine man dies without passing his arts on to the next generation, the tribe and the world loses thousands of years of irreplaceable knowledge about medicinal plants.

Explanation:

3 0
3 years ago
A bacterial cell can live independently of other cells and does not have a membrane surrounding its nucleus. Which set of terms
Dima020 [189]
The answer to your question would have to be C
3 0
3 years ago
Which part of the root contains transport tubes?
Anettt [7]
The part of the root that contains transport tubes is the root hair. The primary role of the root hair is to absorb water and nutrients from the soil. They are hair-like and tubular in structure and are sometimes rarely visible by the naked eye. 
5 0
3 years ago
Read 2 more answers
For many years, scientists believed that almost all animal lineages burst into being during the Cambrian era (just after the end
frosja888 [35]

Answer:

Option (A)

Explanation:

The Precambrian represents the time period, right from the beginning of the earth to about 540 million years back. It is divided into 3 parts, namely the Hadean, the Archean and the Proterozoic. Throughout this geological time, vast changes have taken place on earth. The first life forms of about 3.8 billion years old, that existed on earth were the simple unicellular organisms, whose traces were only found at some particular places. These organisms were very small and are comprised of soft bodies, so they were affected by the earth's dynamic processes. The organisms in order to get fossilized must contain hard parts. Due to the presence of soft bodies, the organisms were not fossilized and so it took a long time to demarcate that the late Precambrian organisms were animal-like life.

hence, the correct answer is option (A).

6 0
3 years ago
Other questions:
  • What's the definition of science
    5·1 answer
  • Chemicals called
    8·1 answer
  • What would happen to the size of the carnivore population if the herbivore population increased?
    10·2 answers
  • What is the function of the cytoplasm?
    11·2 answers
  • When both participants in a species' interaction develop adaptations in direct response to one another, this could progress into
    11·1 answer
  • FOODS RICH IN<br>CARBOHYDRATESfood rich in carbohydrates and fats and proteins ​
    5·1 answer
  • Which of the following structures is responsible for providing energy for the cell?
    5·2 answers
  • To keep the right amount of salt in its body the seahorse has to get rid of extra salt using a process that takes energy what pr
    15·2 answers
  • Tina is getting ready to plan her science fair project. She is intrested in doing something with tomato plants. Which of the fol
    10·1 answer
  • a surfer experienced a windy day at the sea, he counted the waves passing by him per min. he counted 20 waves in one minute. can
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!