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Dvinal [7]
3 years ago
15

What kind of bond holds the two strands of the double helix together?

Biology
1 answer:
Likurg_2 [28]3 years ago
7 0
Hydrogen bonds hold the 2 polynucleotide strands of the double helix of DNA together.
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How does ATP supply energy for cellular activities?What do all cellular activities in living organisms use as a source of energy
Korolek [52]
  • ATP supplies energy for cellular activities by releasing one of the phosphate group in its molecule
  • Cellular activities in living organisms make use of ATP as source of energy

<h3>What is ATP?</h3>

ATP stands for Adenosine triphosphate and it is an energy carrier molecule in living cells of an organism.

The ATP molecule is made up of three components namely;

  • Nitrogenous base
  • 3 Phosphate groups
  • Five carbon sugar

The ATP molecule gains one phosphate group when it stores energy and loses one when it releases energy.

Learn more about ATP at: brainly.com/question/14637256

#SPJ1

6 0
2 years ago
Why did dna technology lead to more use of cladistics?a. it showed that the linnaean system was the most accurate.b. it changed
Alexandra [31]
The correct option from given options is "b", that is <span> it changed ideas about which animals were closely related.
</span>Cladistics<span> was </span>invented for the purpose of improving on taxonomy and it is a way to deal with biological classification. DNA technology lead to more use of cladistics because it changed ideas about which animals were closely related and also it showed new evolutionary relationships between animals.
8 0
3 years ago
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The red-legged frog breeds in ephemeral ponds from January through March. Its relative, the bullfrog, breeds in permanent ponds
LekaFEV [45]

The red-legged frog breeds in ephemeral ponds from January through March. Its relative, the bullfrog, breeds in permanent ponds from late March through May. There are two pre-mating isolation mechanism at play here,

1. Ecological isolation: The habitats are different, hence the individuals of both the species do not meet. Ephemeral ponds are temporary ponds that develop during rainy days, while the permanent ponds are full of water throughout the year.

2. Temporal isolation: The time of mating is different for both the species to avoid contact between the individuals of closely related species. Red-legged frogs mate in January to March slot and the bullfrog in the March to May slot.

8 0
3 years ago
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A species of frog has inhabited the tropical rain forests of south america for the
kobusy [5.1K]

Answer:

Option B. makes the most sense.

5 0
2 years ago
Where is mt.st. Helens locates
My name is Ann [436]
Its in the southwestern side of Washington state

8 0
3 years ago
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