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almond37 [142]
3 years ago
9

Firewood is made up of cellulose, which is a polymer of glucose molecules. When burning, heat and light are given off, indicatin

g that a(n) ________ reaction is occurring.
Biology
1 answer:
skelet666 [1.2K]3 years ago
7 0

Answer:

Exergonic reaction

Explanation:

  • A chemical reaction which is associated with a release of energy and thus, is associated with a negative free energy change is said to be an exergonic reaction.
  • An exergonic reaction owing to the negative free energy change is a spontaneous reaction.
  • The energy that is released in the exergonic reaction is usually observed  in the form of heat and light.
  • The energy is released due to the breaking of the chemical bonds.
  • Therefore, on burning of the firewood the bonds between the glucose molecules break up which leads to the release of energy in the form of heat and light and this is thus, an example of an exergonic reaction.
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Answer:

Option A, most closely related to mammals

Explanation:

Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.  

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Hence, option A is correct

 

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earnstyle [38]

Answer:

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Explanation:

The rule of pairing of base-pair says that A and T base pairs with each other with two hydrogen bonds and G and C base pairs with each other with three hydrogen bonds in DNA. In the case of RNA Uracil comes at the place of thymine that means uracil replaces thymine.

Therefore according to this base-pairing rule the corresponding codon of mRNA transcribes from DNA codon 5' AGT 3' will be 3' UCA 5' as U came in place of A nucleotide, C comes in place of G nucleotide, and A comes in place of T nucleotide.  

Therefore the correct answer is 3' UCA 5'.

4 0
3 years ago
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Answer:

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The nutritive value of sunflower seeds a brief note
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<h2>Nutritive Value if Sunflower Seeds are:--</h2>

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They are also rich in protein (20.77 g).

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