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ioda
3 years ago
10

What 2 scientists established the structure of dna.

Biology
1 answer:
AlexFokin [52]3 years ago
6 0

Answer:

James Watson

Francis crick

if I am correct pls follow

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Briefly explain what happens during Meosis 2.
LiRa [457]

Answer:

So the cells that enter Meosis 2 are the ones that are made in Meosis 1. These cells are haploid meaning they have just one chromosome from each homologue pair. Also In meiosis II, the sister chromatids separate, making haploid cells with non-duplicated chromosomes.

Explanation:

Answer^Above

(BTW if the answer is good can u pls mark me Brainliest? Thanks!)

3 0
3 years ago
Which of the following chemicals opens us binding sites allowing muscle filaments to connect to each other? Select one:
HACTEHA [7]

Answer:

The correct answer will be option-D.

Explanation:

Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.

Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.

This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.

Thus, option-D is the correct answer.

3 0
4 years ago
The following are steps used to construct a cladogram that best reflects the evolutionary relationships of a group of species. W
svetlana [45]

Answer:

Apply the principle of parsimony

Explanation:

A cladogram is used to show or illustrate hypothetical speciation and relationships between species. They are commonly used to classify animals.

The principle of parsimony argues that the simplest of competing explanations is most likely to be correct.  

In order to construct a cladogram that best reflects the evolutionary relationship of a group of species. Application of the principle of parsimony  will help in deciding which tree is most likely to have occurred based on the fewest character state changes.

8 0
3 years ago
What is the symbiosis of certain bacteria live in human intestines where they get food and also help humans break down their foo
Alja [10]
Here is what all 3 symbiotic relationships are: Parasitism is where one organism is benefited and the other is harmed. Commensalism one organism is benefited and the other one is not helped or harmed. Mutualism is were both organisms are benefited or both help each other. Easy ways to remember symbiotic relationships :)
5 0
3 years ago
What air pollutants causes a reddish-brown haze in the sky?
Mars2501 [29]

Answer: Nitrogen dioxide

Explanation:

7 0
3 years ago
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