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Ber [7]
3 years ago
6

How do scientists use DNA to study the origins of humans? a. Cloning c. Using Punnett squares b. Examining the number of chromos

omes in populations d. Looking at the genetic markers in different populations
Chemistry
1 answer:
Korolek [52]3 years ago
5 0
B. examining the number of chromosomes in population
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What forms of matter exists that are not made of chemical bonds?
zepelin [54]

Mixtures

Explanation:

The forms of matter that exists without having chemical bonds between them are mixtures.

Mixtures are impure substances. They are made of matter that are not chemically bonded to one another.

Here are some of the characteristics of a mixture:

  • Composition is indefinite i.e they consist of two or more elements and or compounds in any proportion by mass
  • The constituents retain their identities i.e physical properties are not altered.
  • The constituents reacts differently to changed conditions.
  • They can easily be separated into constituents by physical methods.

Many natural mixtures exists and several others can be formulated. Examples include air, sea-water, muddy water, alloys e.t.c

learn more:

Mixture brainly.com/question/1446244

#learnwithBrainly

8 0
3 years ago
A 0.0200 m nacl solution was formed when 38.0 grams of nacl was dissolved in enough water. what was the total volume of the solu
Lostsunrise [7]

Total volume of the solution formed will be 32.5 liters

Given:

Molarity of solution = 0.0200 m

mass of nacl = 38.0 grams

To Find:

total volume of the solution

Solution: Molarity is defined as the amount of solute present in 1 L of solution. The equation used to determine molarity of the solution follows:

M = given mass of nacl/molar mass of nacl*1/volume of solution

volume of solution = given mass/molar mass*1/molarity

volume = 38/58.5*1/0.02 = 32.5

Hence, volume of solution = 32.5 litres

Learn more about Molarity here:

brainly.com/question/26873446

#SPJ4

3 0
2 years ago
How is chemotropism affected in space
mart [117]

Answer:Gravitropism or geotropism is growth in response to gravity.

Explanation:

Hope this hellps

8 0
2 years ago
Help me please, I don't get it. Please & thank you, xoxo !
Scilla [17]

Sorry I accidentally touched it

8 0
3 years ago
Which physical property of matter can be expressed numerically in SI units?
pantera1 [17]
Mass is the physical property of matter can be expressed numerically in SI units. 
3 0
4 years ago
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