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galina1969 [7]
3 years ago
12

Which statement best explains why carbon is present in so many kinds of molecules?

Biology
2 answers:
Monica [59]3 years ago
4 0

The answer is C. I took the test and that was correct. I hope this helps.

Sunny_sXe [5.5K]3 years ago
3 0
Your answer is going to B.
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What are some examples of physical evidence that support scientific theories that Earth has evolved over geologic time?
mel-nik [20]
Some examples of physical evidence that supports scientific theories that earth has evolved over geologic time are the studies have have been done supporting the idea of Pangaea that all the continents were together and with time separated, if you look at a map you can see that the continents almost fits like a puzzle, of course they do not because of erosion and climate change, but it’s the closest example.
8 0
2 years ago
How many grams of solute are needed to make 250 mL of a 2.055 M NaCl solution?
Veronika [31]

Answer:

30grams

Explanation:

To calculate the mass (number of grams of the solute) in the solution, we need to calculate the number of moles it contains first. We use the formula;

M = n÷ V

Where; M= Molarity or Molar concentration = 2.055M

n= number of moles= ?

V= Volume = 250mL

Volume in L is 250/1000 = 0.250L

n= M × V

n= 2.055 × 0.250

n= 0.51375moles

The mass is calculated using :

Mole (n) = mass (m) / molar mass (MM)

Molar mass of NaCl = 23 + 35.5

= 58.5g/mol

Mass = molar mass × mole

Mass = 58.5 × 0.51375

Mass = 30.0543

Therefore, the mass is 30grams

7 0
3 years ago
How does dew form on grass?
svetlana [45]

Answer:

Dewy Grass. Dew is a natural form of water, formed as water vapor condenses. ... This forces water vapor in the air around cooling objects to condense. When condensation happens, small water droplets form—dew.

so it's C

Explanation:

8 0
3 years ago
A cell with 22 chromosomes undergoes mitosis. How many nuclei result from this process?
kondor19780726 [428]

Answer:

Explanation:

Mitosis is the phase of the cell cycle where the nucleus of a cell is divided into two nuclei with an equal amount of genetic material in both the daughter nuclei. It succeeds the G2 phase and is succeeded by cytoplasmic division after the separation of the nucleus.

5 0
2 years ago
Megan wants to see if mice that are fed food A or B grow at a faster rate. She measures the mass of the mice on day 1,
Rama09 [41]

Answer:

<u>No, there is no control group.</u>

Explanation:

To test various theories, experiments are usually conducted under a number of different conditions. Several considerations must be established when planning studies to ensure reproducibility, accuracy, and validity of findings.

For example, while controls are kept constant, or unmanipulated. Also, separate independent variables are strictly altered and analyzed - this guarantees validity and may show whether external influences affected the experiment. Here the variable being altered or measured is the food, and the resultant weight is the factor being observed.

8 0
2 years ago
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