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iren2701 [21]
3 years ago
8

Why is DNA used to show common ancestry ?

Chemistry
1 answer:
Marizza181 [45]3 years ago
5 0

Answer:

while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules can be used to determine species' relatedness.

Explanation:

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Covalent bonds usually occur between atoms that have
marta [7]

Answer: A: high ionization energies; high electron affinitlies.

Explanation: Covalent bonds are basically about sharing of electrons between two atoms to achieve that stable structure. They are formed between two atoms when both have similar tendencies to attract electrons to themselves (i.e., when both atoms have identical or fairly similar ionization energies and electron affinities). Covalent bonding usually occurs between two non-metals.

For effective and proper bonding, the two atoms involved in the covalent bonding exercise should be small and hungry for electrons. This is to enable the nuclei of both atoms to effectively attract and hold the shared electron(s) in place; hence, the need for high ionization energies & high electron affinities for a more effective covalent bonding.

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3 years ago
Susanna was hiking in the mountains, and she discovered an interesting, shiny rock. She wondered if this sample was actually a r
Zigmanuir [339]

Answer:

Yes it is a mineral

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Susanna has found a mineral because the five characteristics of a mineral are naturally occurring solid, crystal structure, forms by inorganic process, and definite chemical composition. Everything that was listed in the question describes the fact that its a mineral.

Brainliest would be appreciated :)

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3 years ago
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babunello [35]

hold at base and arm

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Which statements describe seismic waves? Select three options.
Alenkasestr [34]

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A, C, E

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Why is the water cycle called a cycle and not a system?
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It is called a cycle because it is repetitive, therefore making it a cycle (or almost never ending)
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