1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
padilas [110]
3 years ago
12

Before fossil fuel use became widespread, which of the following did people use for a. energy?

Biology
2 answers:
Alex777 [14]3 years ago
3 0

Answer: im not 100% but i think its E all

Explanation:

Ratling [72]3 years ago
3 0

Answer:

e

Explanation:

You might be interested in
A mutation occurs in an original DNA template that changes the DNA, changes the RNA, but does not change the protein sequence. W
jonny [76]

Answer:

<h2>The changes that do not affect the function of a protein are called silent mutations.</h2>

Explanation:

As given here as a mutation occurs in an original DNA template that changes the DNA, by transcription this mutation passes into RNA and changes the RNA, but it does not change the protein sequence, it means that this mutation could be silent mutation.

Silent mutation is the mutation which cause the change of a base in that, after the mutation the codon codes for the same amino acid, or the amino acid which do no cause any change in the protein, hence these changes do not affect the function of a protein.

5 0
3 years ago
Which of the following statements is true about tides?
Musya8 [376]
Tides are caused by the location of the earth, sun and moon.
5 0
3 years ago
What were forensic scientists in the U.K. able to learn through isotopic analysis?
Sergeu [11.5K]
Through  isotopic analysis, forensic scientists can identify mutilated or deteriorated body, they can also identify his geographic location and life history. <span />
7 0
3 years ago
Contrast the electron transport chain in photosynthesis with the one in cellular respiration by identifying sources of the high-
nlexa [21]

Respiration:

The respiratory chain detailed here is that of mammalian mitochondria:

NADH → NADH dehydrogenase → ubiquinone (coenzyme Q10) → coenzyme Q-cytochrome c reductase → cytochrome c → cytochrome c oxidase → O2;

succinate → succinate dehydrogenase → ubiquinone (coenzyme Q10) → coenzyme Q-cytochrome c reductase → cytochrome c → cytochrome c oxidase → O2.

It consists of the following elements:

The high transfer potential electrons of NADH are transmitted to coenzyme Q10 (ubiquinone) by NADH dehydrogenase, or complex I. Reduced coenzyme Q10 is ubiquinol Q10H2.

The electrons with a high succinate transfer potential are transferred to coenzyme Q10 by succinate dehydrogenase, or coenzyme II, also giving ubiquinol Q10H2.

Ubiquinol Q10H2 transfers its electrons to two cytochromes c under the action of coenzyme Q-cytochrome c reductase, or complex III.

Four cytochromes c each transfer their electron to an oxygen molecule under the action of cytochrome c oxidase, or complex IV. Two molecules of water are formed.

Each of these four respiratory complexes has an extremely complex structure partially included in the internal mitochondrial membrane. Apart from the complex II, they are proton pumps. The electrons circulate between these structures on liposoluble or hydrophilic electron transporters depending on the case.

Photosynthesis:

Photophosphorylation is the equivalent, for photosynthesis, of oxidative phosphorylation for cellular respiration. It constitutes the "light phase" of photosynthesis, that is, it groups together light-dependent reactions.

In plants, photophosphorylation occurs in the membrane of thylakoids, within chloroplasts:

H2O → photosystem II (P680) → plastoquinone → cytochrome b6f complex → plastocyanine → photosystem I (P700) → ferredoxin → ferredoxin-NADP + reductase → NADP +;

cyclic photophosphorylation: (ferredoxin →) plastoquinone → cytochrome b6f complex → plastocyanine → photosystem I (P700) → ferredoxin (→ plastoquinone).

Contrast:

<u>What he has in common is:</u>

*The sequence of several complex membrane proteins transporting electrons.

*The conversion of DNA into ATP.

<u>The differences</u> are in the transport proteins themselves, as well as the direction of H + flux (to the cytoplasm for photosynthesis, and to the mitochondrial matrix in respiration).

8 0
3 years ago
Why is DNA in this world?
Anna11 [10]
So we can all be identified
6 0
3 years ago
Read 2 more answers
Other questions:
  • Uranium is used to produce fuel for _____
    7·2 answers
  • Where does the heat that warms your body come from ? explsin your answer?
    12·1 answer
  • The sizes, shapes, and arrangements of mineral grains in an igneous rock are known as ________.
    11·1 answer
  • 1. True or False?
    8·1 answer
  • I need help with this question
    10·1 answer
  • Put the stages of cell cycle in order help
    6·1 answer
  • All energy conversion activities produce an equal amount of pollution. True False
    6·1 answer
  • True or False? When populations of the same species are isolated from each other, they are more likely to become two separate sp
    8·2 answers
  • PLZ HELP GIVEING BRAINLIST
    11·1 answer
  • Please help!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!