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lord [1]
3 years ago
6

What statement is true regarding active transport

Biology
1 answer:
Sonbull [250]3 years ago
7 0

Answer:

Substances can move from areas of low concentration to high concentration.

Explanation:

For the first one, substances CAN move in and out of cells in an active transport.

As for the second one, active transports do require energy. That is what makes them "active" and sets them apart from <em>passive transports</em> which don't require energy.

Lastly, substances can move across a membrane regardless of if they are water soluble (such as lipids, or fats that the cell does not use. Think of it as a way for the cell to eat, drink, and defecate or remove waste.)

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Membrane receptors are used by which types of hormones?
Ivahew [28]

Answer:

Lipid insoluble hormones/Peptide hormones

Explanation:

Hormones produce their effect by binding to speific receptor. These receptors may be intracellular or membranal.

Membrane receptors;

The lipid insoluble hormones cannot cross the plasma membrane thus their receptors are found on plasma membrane. These are usually peptide hormones.

Examples; Insulin.

Intracellular receptors;

The lipid soluble hormones can cross the plasma membrane thus their receptors are found in cytoplasm. These are usually steroidal hormones.

Example; Testosterone.

5 0
3 years ago
Which best describes the offspring of protists?
Hunter-Best [27]

Options found elsewhere:

-always genetically identical to one parent

-always genetically identical to both parents

-never genetically identical to one parent

-sometimes genetically different than both parents

Answer:

-sometimes genetically different than both parents

Explanation:

Protists are eukaryotes that cannot be classed as animals, plants, or fungi. They are quite diverse. Examples include amoeba, plasmodium, and slime mould.

Because they are so diverse, protists also have very different modes of reproduction. Some protists undergo asexual reproduction, where they simply make a copy of themselves without a mate. Others undergo sexual reproduction.

Therefore, the only option that can be correct is "-sometimes genetically different than both parents" .

If they were always genetically identical to one parent or both parents, that would mean that sexual reproduction could not be possible. If they were never genetically identical to one parent, that would mean that asexual reproduction could not be taking place.

7 0
3 years ago
Read 2 more answers
At the coordinates 45 degrees W &amp; 72 degrees N it is 9:32 AM. What time is it at the coordinates 75 degrees W &amp; 45 degre
garik1379 [7]

Answer:

The correct option is;

7:32 AM

Explanation:

The information given are;

The time at 45 degrees W and 72 degrees N = 9:32 AM

The variation of time with lines of longitude  is given as 15 degrees for each 1 hour variation, therefore, where we have the other location at 75 degrees W and 45 degrees S, the difference in the longitude = 75 - 45 = 30 degrees west  of the initial location

Moving west is in the opposite direction of the Earths rotation, therefore, we subtract 1 hour for every 15 degrees giving 30/15 = 2 hours subtracted

The time at 75 degrees W and 45 degrees S is therefore, 9:32 AM - 2 hour = 7.32 AM

The latitude of a place left out in the calculation of the relative time of a place.

8 0
3 years ago
A shining light casts a horizontal beam through a spacecraft. Which two observers would see this beam of light in the exact same
Bas_tet [7]
<h2>Answer: </h2><h3>The correct answer is option C. </h3>

<h2>Explanation: </h2>

From the following question, the third option is right, because when the shining light create a horizontal beam over the spacecraft, the observer who is on the earth would see that light in the same way at the time spacecraft is at rest and when observer in the spacecraft at the time spacecraft is at rest.

So this is the correct answer.

4 0
3 years ago
Read 2 more answers
Which form of natural selection on polygenic traits results in the creation of two distinct phenotypes? A. Directional selection
mojhsa [17]

Answer;

-Disruptive selection

Disruptive selection results in the creation of two distinct phenotypes.

Explanation;

-Disruptive selection is a type of natural selection that selects against the average individual in a population. The make up of this type of population would show phenotypes of both extremes but have very few individuals in the middle.

-The variance of the trait increases and the population is divided into two distinct groups. The disruptive selection will cause organisms with intermediate traits to reproduce less, and will allow those organisms with extreme traits to reproduce more.

5 0
3 years ago
Read 2 more answers
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