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Marat540 [252]
3 years ago
9

Which of the following is true of environmental changes?

Biology
1 answer:
Nutka1998 [239]3 years ago
7 0
<span>b. they may affect several populations in an ecosystem.
</span>
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The arteries that branch from the aorta and provide blood to the heart muscle itself are _______________ arteries.
Anna11 [10]
Coronary artery.....are the arteries that provide blood to the wall of heart !
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3 years ago
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TACATCCATCAGTTACGC A guanine replaced the 1st Thymine in the original DNA strand above, how many amino acids would be changed as
Julli [10]

Answer:

One amino acid

Explanation:

This question is describing the occurrence of the process of mutation, which is the alteration in the genetic sequence of a gene. In this question, a DNA sequence was given as follows: TAC-ATC-CAT-CAG-TTA-CGC. However, a SUBSTITUTION MUTATION took place in such a way that the thymine base was replaced by a guanine base to have mutated sequence: GAC-ATC-CAT-CAG-TTA-CGC.

Since the mutation is a kind of substitution mutation, only the codon affected by that mutation will change. This DNA sequence will be transcribed into a mRNA sequence. The mRNA will be read codon by codon (a group of hree nucleotides) to produce amino acid. Since one codon will be involved, one amino acid will be affected.

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2 years ago
Most of the energy needed by eukaryotic cells produced in
antiseptic1488 [7]

Answer: ATP

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        hope i helped

4 0
3 years ago
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Time on earth is divided into 6 eras. Three are considered "Precambrian" Which eras are NOT Precambrian?
bulgar [2K]

Explanation:

<u>the  Paleozoic Era </u>

The Precambrian era describes a period of time that pre-dates Cambrian. This time typically references the entire period of the history of earth before the formation of rocks containing identifiable fossils occurred. It covers the majority of Earth’s history and is divided into the Hadean, Archean and the Proterozoic era.

Just before the Cambrian eruption, in the  Paleozoic Era the environment was oxygenated, culminating in an explosion of new life in the Proteozoic Eon (2500-541 million years ago) in the form of primitive blue-green algae named cyanobacteria and oxygen based species. Multicellular species followed later, along with structure at higher levels, and complex life. Oxygen levels grew gradually over this period of time, from low levels.

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

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3 years ago
Earth changes all the time, making it a __ planet.<br> Answer here<br> SUBM
Artyom0805 [142]

Answer: Dynamic planet

Hope it helps

Explanation:

6 0
3 years ago
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