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Lady bird [3.3K]
3 years ago
15

Mrs. Lewis set up a lab for her biology students using a culture of the small crustacean Daphnia, obtained from a pond that was

20°C. The students are to investigate the effect temperature has on Daphnia. The students will observe the crustacean’s heartbeat under the microscope, at different temperatures, and count the number of heartbeats per sec. What is the independent variable in this experiment?
5 points
Biology
1 answer:
Drupady [299]3 years ago
5 0

Answer:

Hiii, the answer is b, hope this helped! :)

Explanation:

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Balanced chemical equations demonstrate
sergij07 [2.7K]
Hello there!


Your question states: Balanced chemical equations demonstrate 

The answer is B. The law of conservation of mass


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Let me know if you need anything else!

~ Zoe
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3 years ago
(This is about DNA)
n200080 [17]

Answer:

B. 20%

Explanation:

The complementary base-pairing rule states that Adenine always pairs with Thymine (A with T), and Cytosine with Guanine (C with G).

Because of this, the amount of Adenine present must be the same as the amount of Thymine present, and the same for Cytosine and Guanine.

This means that if there is 30% Adenine, there is also 30% Thymine as each A base is paired to a T base. This adds to 60%, so Cytosine amounts and Guanine amounts must add to 40% to make 100%.

Since they are equal in amount, there must be 20% of each.

Therefore the answer is B. 20%

There is 30% Adenine, 30% Thymine, 20% Guanine and 20% Cytosine.

Hope this helped!

6 0
3 years ago
Methods farmers use to increase crop production from their land
kirill [66]

Explanation:

Consider these 9 tips, techniques, and methods regarding how to increase your corn crop yield

Plant Early, Plant Effectively. ...

Practice Seasonal Soil Rotation. ...

Know The Yield Potential. ...

Always Scout Your Fields. ...

Ensure Proper Water Drainage. ...

Utilize Fertilizers. ...

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5 0
3 years ago
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Serjik [45]
The answer is  Chronic<span> Stress</span>
8 0
3 years ago
The placement of prokaryotes into major clades within the domains Archaea and Bacteria has been based on __________.
Alja [10]

Answer:

Molecular evidence

Explanation:

Earlier archaea were considered as bacteria because they show some similarities with bacteria like binary fission as mode of reproduction, lack of a nucleus, etc.

Later Carl Woese separated bacteria in a different domain and divide prokaryote into two domains called bacteria and archaea. He separated archaea from bacteria on molecules evidence.

He compaired rRNA sequence between bacteria and archaea and observed that they both differ in rRNA sequence which allowed him to make a separate domain for archaea.

6 0
3 years ago
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