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amm1812
3 years ago
5

Two types of transport of molecules across a cell membrane are: Transport 1: Solute molecules move across the cell membrane alon

g their concentration gradient; requires no energy expenditure. Transport 2: Solute molecules move across the cell membrane against their concentration gradient; requires expenditure of energy. Which statement is CORRECT? A) Transport 1 describes passive transport by diffusion. B) Transport 2 describes passive transport by the Na+/K+ pump. C) Transport 2 describes passive transport by a carrier protein. D) Transport 1 describes facilitated transport of substances through the membrane.
Biology
1 answer:
Scrat [10]3 years ago
4 0

The answer is A


Transport 1 describes passive transport by diffusion

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Barnacles attach to shellfish for transportation. The shellfish is not helped or harmed. This is an example of_
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The correct answer is:

_________________________________________________

                       →    " commensalism" .

_________________________________________________

<u>Note</u>: "Commensalism" refers to a symbiotic relationship {"symbiosis"}  between two (2) organisms — in which one organism benefits and the other organism is neither helped nor harmed.  

              { i.e.  " +, 0 " ;  that is:  "plus" sign for "one organism benefits" ;

                       "zero" sign for "neutral" ;

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In the example given in the question, the two (2) organisms are:

 1)  the barnacles;  and:  2)  the shellfish.

       The barnacles benefits by given a place to attach for the purpose of transportation (by using the shellfish to "cling to"}.  

      The shellfish are neither helped (benefitted in anyways from the attachment from the barnacles— nor are the shellfish harmed in any way.

_________________________________________________

Hope this answer helps you!

     Best wishes in you academic pursuits

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8 0
3 years ago
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6 0
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Explanation:

A biome is different from an ecosystem. An ecosystem is the interaction of living and nonliving things in an environment. A biome is a specific geographic area notable for the species living there. A biome can be made up of many ecosystems. For example, an aquatic biome can contain ecosystems such as coral reefs and kelp forests.

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