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ki77a [65]
3 years ago
6

When does the cell have to use active transport?

Biology
2 answers:
xxMikexx [17]3 years ago
7 0
The answer is to move molecules across the membrane against a gradient.
VikaD [51]3 years ago
3 0

Answer:

The correct answer is option D. "to move molecules across the membrane against a gradient".

Explanation:

Active transport in cellular biology takes place when a cell has to move molecules or ions across the membrane from a region of lower concentration to a region of higher concentration. The cells needs to consume energy for this type of transport, which contrast with passive transport, at which the transport is in favor of the gradient and no energy input is needed.

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Why are marshmellows scientificlly the best tasting thing ever?
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Marshmallows are probably so delicious because of several important factors. They are fluffy, soft, and oh-so sweet. They melt in your mouth and taste absolutely heavenly with chocolate and graham crackers. Or throw a couple in your hot chocolate. There's no wrong way to eat them and they're pretty cheap too.
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3 years ago
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Which of these is an interaction in which the host is harmed? Competition Mutualism Predation Parasitism
BabaBlast [244]
Parasitism is an interaction in while the host is harmed
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4 years ago
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A cylinder at left with balls evenly spaced throughout the cylinder has an arrow leading to a cylinder at right cylinder with ba
nata0808 [166]

Answer:

C. Atoms lose energy as a gas changes to a solid.

Explanation:

Physical changes of matter take place by adding or removing energy from the matter.

In the given images, The<em> left cylindrical is showing gas phase while the right cylindrical is showing a solid phase.</em>

The process of conversion of gas into solid is called deposition. Deposition process takes place when atoms lose their energy and have high kinetic energy so they directly convert into solid and not into liquid.

Hence, the correct option is "C".

3 0
3 years ago
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The ________ is a region of dense bone that surrounds and protects the membranous labyrinth. vestibule membranous callus bony ca
Law Incorporation [45]

The bony labyrinth is a region of dense bone that surrounds and protects the membranous labyrinth.

Labyrinth is the name given to the inner ear. It is made up of a network of interconnecting sacs and canals. The inner ear is composed of two parts: bony labyrinth and membranous labyrinth. A vestibule, three semicircular canals, and a spirally wound cochlea make up the bony labyrinth. It is perilymph-filled.

The membranous labyrinth is encircled by the bony labyrinth. It includes the hearing and balance sensory receptors. The cochlear duct, saccule, and utricle and three semicircular ducts that make up the endolymph-filled membranous labyrinth. The cristae, an organ of corti, and the ampullaris maculae are examples of sensory receptors.

To learn more about inner ear, membranous labyrinth and bony labyrinth here,

brainly.com/question/28169216

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4 0
2 years ago
A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because
KonstantinChe [14]

Answer:

E = The activation energy barrier for this reaction can not easily be surmounted.

Explanation:

Starch:

Starch is a polymeric carbohydrate consist of various glucose units join together through glycosidic bonds.

Reason why it is not dissolve at room temperature:

When starch is added into water it form granules with cold water and can be soluble by heating.

At a room temperature the starch does not readily decompose to from the solution by decomposing into simple sugar because the activation energy barrier for this reaction can not easily be surmounted at a room temperature.

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