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xenn [34]
3 years ago
12

Which change is chemical?

Biology
1 answer:
liraira [26]3 years ago
8 0
Water evaporating is a chemical change so 4
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What activation energy was used to start the chemical reaction in the burning marshmallow?
Sonja [21]

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, let's understand some terms

Activation energy is the minimum amount of energy required for a reaction to proceed. Under normal condition, when the activation energy is high, it takes longer for the reaction to proceed than when it is low.

The burning of marshmallow is an exothermic reaction as it involves the transfer of heat energy into the environment.

7 0
4 years ago
Mitochondrial DNA accumulates DNA mutations quickly. Because of this, it would be most beneficial in analyzing the ancestral rel
dezoksy [38]

Answer:

Mitochondrial DNA accumulates DNA mutations quickly. Because of this, it would be most beneficial in analyzing the ancestral relationship of organisms that are

A. Mitochondrial DNA is beneficial in both of these cases

B. Distantly related

C. Mitochondrial DNA is not used to analyze relationships

D. Closely related

Explanation:

Mitochondrial DNA <em>does not serve to identify individuals without ambiguity</em>, but to detect kinships between groups of individuals; it is then used for comparisons between missing persons and unidentified remains and their relatives.

<u><em>The answer is</em></u>: <u>D. closely related.</u>

6 0
3 years ago
Explain interface and the phases that make up interface
____ [38]

Answer:

Interphase is the basic phase of cell cycle.

Explanation:

Interphase is the non-dividing phase. It happens between two successive M phase. Interphase is preparatory phase during which the cell prepares for the next cell division and grows to the same size as their mother cell.  This phase is further divided into three sub-phases: i) G1 phase- interval between mitosis. DNA replication begins here. It is the first growth phase, RNA and protein get synthesized. ii) S-phase- Synthesize of DNA takes place and chromosome gets duplicated. iii) G2 phase-

Pre-mitotic phase or the second growth phase. it prepares the cell for the next cell division.

5 0
3 years ago
What advantages do indigenous groups of people around the world have because of their different skin colors?
Lorico [155]

Answer:

UV intensity predicts the skin color of indigenous populations. Stronger UV radiation is correlated with darker skin color. Data suggest that variation in human skin melanin production arose as different populations adapted biologically to different solar conditions around the world.

Explanation:

4 0
3 years ago
How does drug use affect dopamine?
tatiyna
Drugs<span> are chemicals that </span>affect<span> the brain by tapping into its communication system and interfering with the way neurons normally send, receive, and process information. Some </span>drugs<span>, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter.
</span>
5 0
3 years ago
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