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atroni [7]
3 years ago
13

You have learned that both biotic and abiotic factors affect ecosystems. give some examples of each, and explain how biotic and

abiotic factors could have affected the tortoises that darwin observed on the galápagos islands.
Biology
1 answer:
BARSIC [14]3 years ago
4 0
Living creatures and non living creatures
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Hey um please help me before 3:00pm <br> the air and sky is earth's what?
kotegsom [21]

Answer:

The atmosphere

Explanation:

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3 years ago
Which of the following sequences is correct for the downhill movement of electrons during cellular respiration? A. glucose – cit
Volgvan

Answer:

B. glucose – NADH – electron transport – O2

Explanation:

This is the sequence  from glycolysis in which  glucose molecules are split down to pyruvate, to oxidative phosphorylation.

During this process the electrons are released from glucose  molecule as it is oxidised multiple times as pyruvate, and other molecules formed subsequently in Kreb's cycle, until the oxidative phosphorylation is reached .

The makes the  carrier molecules to be reduced.Thus NAD→NADH,FAD→FADH .

The electrons from above are  transferred in hydrogen atoms  to matrix by these co-enzymes.Where the H is split to electrons  and protons.

The electrons for the ETC, produce the PMF for transporting  protons into the intramembrane space.

The concentration of protons generated the electrochemical gradients  which is needed to produce energy for for phosphorylation of ADP with Pi to form ATP by ATpase synthase.

The electrons moves as chain,and this is finally accepted by oxygen as the final electron acceptor.

3 0
3 years ago
Match each lipid with its correct components or description.
Mumz [18]

Answer:

(1) glycerophospholipids ⟶ (C) lipids with phosphate-containing head groups

(2) cerebrosides ⟶ (D) fatty acid linked through an amide bond to the sphingosine C(2)-amine

(3) gangliosides ⟶ (B) anionic sphingolipids containing one or more sialic acid residues

(4) sphingolipids ⟶ (A) built on sphingosine

Explanation:

1) Choline (Fig. 1) is a glycerophospholipid. It is a glycerol-based lipid with a phosphate-containing head group.

(2) Galactosylceramide (Fig. 2) is a cerebroside. It contains a fatty acid linked through an amide bond to the sphingosine C(2)-amine

(3) Gangliosides are glycosphingolipids that contain sialic acid. GQ1b (Fig. 3) is one of the most abundant gangliosides in the human brain. The carboxyl group of the sialic acid is in the ionic form.

(4) Sphingomyelin (Fig. 4) is a sphingolipid. It is based on sphingosine, with a phosphocholine head and a fatty acid chain.  

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tia_tia [17]

Answer:

D. Pink

Explanation:

6 0
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Natalija [7]

Answer:

Moisture - There must be sufficient water vapor in the air for a cloud to form. Cooling air - The air temperature must decrease enough for water vapor to condense.

Explanation:

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