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givi [52]
3 years ago
15

Scientist think that many species have one common ancestor. Which answer choice best tells why scientists think this way?

Chemistry
1 answer:
BigorU [14]3 years ago
3 0

Answer:

homologous structures.

Explanation:

If you look at many different organisms, you will see similar structures. Like humans have a forearm, birds have a wing, whales have fins, leopards have legs. The bones evolvolved to fit the animal

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How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?
patriot [66]

In the process of photosynthesis, when a glucose molecule is formed, THE HEAT CONTENT OF THE REACTION INCREASES, THUS, THE VALUE OF Q IS POSITIVE.

There are two types of chemical reaction, these are exothermic and endothermic reaction. Exothermic reactions are those reactions that gives off heat when they are occurring while endothermic reactions are those reactions that absorb heat from their environment during the course of reaction. Photosynthesis is an endothermic reactions; it absorbs energy from the environment when it is occurring, thus, the heat content of the product is always more than that of the reactants. The heat content of compounds are represented by letter q. For photosynthesis, q is positive, because there is an increase in the heat content of the product [glucose] formed.

4 0
3 years ago
Which is the formula for calculating density
o-na [289]

The Density Calculator uses the formula p=m/V, or density (p) is equal to mass (m) divided by volume (V). The calculator can use any two of the values to calculate the third. Density is defined as mass per unit volume.

7 0
3 years ago
A Metal mass of 71.68g occupies a volume of 8cm^3. Calculate the density
Damm [24]
Density = mass
                --------------
                 volume
 
             =        71.68
                    -------------
                          8
 
              =         8.96 g/cm3.

Hope this helps!

5 0
3 years ago
What equation is used to determine the density<br> of an object?
Scrat [10]
D(density)=m(mass)/v(volume)
4 0
2 years ago
Is 2HCl + Na2S - H2S + NaCl balanced?
Radda [10]

Answer:

No.

Explanation:

The balanced equation is,

2HCl + Na2S -> H2S + <u>2</u>NaCl

7 0
3 years ago
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