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Elena-2011 [213]
2 years ago
12

True or false A molecule is made up of atoms that are joined together.

Biology
2 answers:
lilavasa [31]2 years ago
6 0

Answer:

True

Explanation:

Hope this helped! :)

Julli [10]2 years ago
5 0

Answer: True

Explanation:

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Contour intervals between contour lines
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Which is the largest sinus cavity?
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The largest sinus cavity is B. Maxillary Sinus
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Archimedes principle​
prisoha [69]

Answer:

Archimedes principle

Explanation:

Any object, totally or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.

7 0
3 years ago
A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of
julsineya [31]

Answer:

- 100 grams of food A (x)

- 60 grams of food B (y)

Explanation:

According to this question, the group of laboratory rats are being fed a daily diet of:

- 125.6 units of niacin and 5,400 units of retinol

Let x represent the number of grams needed for food A.

Let y represent the number of grams needed for food B.

This means that:

Food A: Niacin = 0.86x, Retinol = 30x

Food B: Niacin = 0.66y, Retinol = 40y

Since there are 125.6 units of niacin fed to the rats in total, then;

0.86x (A) + 0.66y (B) = 125.6

Since there are 5400 units of retinol fed to the rats in total, then;

30x (A) + 40y (B) = 5400

Solving these two equations simultaneously using elimination method:

0.86x (A) + 0.66y (B) = 125.6 ........(eqn 1)

30x (A) + 40y (B) = 5400 ............ (eqn 2)

Multiply eqn 1 by 30 and eqn 2 by 0.86

30 × 0.86x + 0.66y = 125.6

0.86 × 30x + 40y = 5400

25.8x + 19.8y = 3768 ............ (eqn 3)

25.8x + 34.4y = 4644 ........... (eqn 4)

Subtract eqn 3 from eqn 4

14.6y = 876

Divide both sides by 14.6

y = 876/14.6

y = 60

Substitute value for y (60) into eqn 2

30x + 40y = 5400

30x + 40(60) = 5400

30x + 2400 = 5400

30x = 5400 - 2400

30x = 3000

x = 3000/30

x = 100

Therefore, she feeds the group of rats 100grams of food A (x) and 60 grams of food B (y).

4 0
3 years ago
What are the differences between density-independent and density-dependent limiting factors?
erica [24]

Density independent means that the limiting factors are not dependent on the number of individuals in the population. For example, an earthquake will kill individuals in a population no matter if the population is large or small.

A density dependent limiting factor means that the effect is dependent on how many individuals there is in a population. For example, a disease will have greater effect in a large population since it would be spread to more individuals.

7 0
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