What does selectively permeable membrane mean

Biology

2 answers:

Yanka [14]3 years ago

7 0

Selective permeability membrane is the membrane that allows certain organisms to come in and out of the cell.

Anvisha [2.4K]3 years ago

6 0

Answer:

The answer is: It means it is a membrane that will allow certain molecules or ions to pass through it by means of active or passive transport.

Explanation:

All cells are enclosed with a cell membrane. The term, selectively permeable, refers to :

the membrane allows some substances or molecules to enter the cells, and others to be prevented from entering. It also allows substances to leave the cell.

This process can be done by :

Active transport -requires the cell to expend energy to move the materials.

Passive transport- it can be done without using cellular energy.

You might be interested in

Elements, which are unstable elements that release energy as

madreJ [45]

$\huge\bold\red{₳₦₴₩ɆⱤ:-}$

Absolute Dating

AKA. RADIOMETRIC DATING

We can learn about the past by studying the present.

The Principle of Uniformitarianism states that current geological processes are the same processes that were at work in the past. This principle was proposed by Charles Lyell in the 1800's

Absolute Dating

Involves finding the absolute age (actual age) of a rock or fossil.

Elements that emit particles and energy are radioactive.

As radioactive elements emit particles and energy, they form new isotopes or elements.

6 0

3 years ago

Read 2 more answers

What is a shadow? Explain by giving an example.

Len [333]

Answer:

Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow

3 0

2 years ago

Read 2 more answers

From fossil evidence, you know two species shared a common ancestor approximately 50 million years ago. In comparing a known neu

MissTica

Answer:

Option c ( $2\times 10^{-9}$ ) is the correct alternative.