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Mama L [17]
3 years ago
5

Lesson 3 Ce x

Biology
1 answer:
Verizon [17]3 years ago
8 0

Answer:

the answer is "B"

Explanation:

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Which statement is true of succession? Most communities are already completely stable. Most communities take hundreds of years t
Setler79 [48]

Answer:

Option B, Most communities never become completely stable

Explanation:

In an ecological succession, most of the species are unstable and they keep on changing continuously. The succession is primarily of two types –  

a) Primary Succession – In this, community of species occur on a new habitat which had been never occupied earlier. Or it can be said that it is entirely a new habitat.

b) Secondary Succession – In this, community of species occur in a habitat where earlier life existed but it was disturbed or damaged by some environmental condition.  

Hence , the correct answer is option B

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Alinara [238K]

Answer:

It allows passage of particles into and out of the cell.

Explanation:

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Do Earthworms have an opened or closed circulatory system? Why?
Alchen [17]

Answer:

Explanation:

In open systems, hemolymph is not contained in vessels and instead surrounds tissues and organs. In an earthworm's circulatory system, blood is contained within vessels (dorsal, ventral, and lateral), which categorizes it as a closed system.

5 0
3 years ago
A cell spends approximately 90% of its cycle in _____.
marysya [2.9K]
A cell spends approximately 90% of it's cycle in interphase
3 0
3 years ago
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The concentration of H⁺ ions inside the mitochondrial matrix is lower than it is in the cytosol or the mitochondrial intermembra
nikdorinn [45]

Answer:

(b) inhibition of ATP synthesis

Explanation:

The inner mitochondrial membrane is impermeable to protons. Electron transfer from NADH and FADH2 to molecular oxygen via electron transport chain generates electrochemical gradient by pumping the protons from matrix to intermembrane space. This electrochemical gradient drives ATP synthesis by down the concentration gradient transport of protons back to the matrix via proton channels.

A compound able to carry protons back to the mitochondrial matrix would dissipate the electrochemical gradient. In the absence of proton concentration gradient across the inner mitochondrial membrane, ATP synthesis would stop.  

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