answer.
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
adoni [48]
2 years ago
10

Proton pumps are used in various ways by members of every domain of organisms: Bacteria, Archaea, and Eukarya. What does this mo

st probably mean? Proton pumps are used in various ways by members of every domain of organisms: Bacteria, Archaea, and Eukarya. What does this most probably mean? A. Cells of each domain evolved proton pumps independently when oceans became more acidic. B. Proton pumps are an essential feature of all cell membranes. C. Proton pumps must have evolved before any living organisms were present on Earth. D. Proton gradients across a membrane were used by cells that were the common ancestor of all three domains of life.
Biology
1 answer:
evablogger [386]2 years ago
6 0

Answer:

The correct answer is A and D

Explanation:

According to Russell's conception that lies in natural proton gradients. He states that Four billion years ago, alkaline fluids bubbled to produce mildly acidic oceans (As CO2 levels were about a thousand times higher, and it reacts with H2O to form carbonic acid, rendering the oceans mildly acidic). Acidity is just a measure of proton concentration,  higher in the oceans than in vent fluids. This difference has given rise to a natural proton gradient across the vent membranes that had the same polarity (outside positive) which is similar to the electrochemical potential as modern cells have. This might be the reason that last universal common ancestors of all the three domains have evolved proton pumps.

You might be interested in
What is a series of steps designed to help you solve problems and answer questions
Ksenya-84 [330]
A series of steps designed to solve problems and answer questions is "a scientific method".
6 0
2 years ago
Which of the following genes would not likely be encoded on a plasmid?
raketka [301]

Answer:

gene encoding enzymes for glycolysis.

Explanation:

Plasmid may be defined as an extra chromosomal circular DNA that replicate independently of the main chromosomal material. Plasmid are generally used for the manipulation of genes in molecular technologies.

Plasmid can encode gene for toxins, antibacterial resistance and for the unusual substrate degradation. The plasmid cannot code enzyme for glycolysis because these enzymes are already present in the host organisms. Glycolysis enzymes are independent on the plasmid regulation.

Thus, the correct answer is option (3).

7 0
2 years ago
Five dialysis bags constructed of membrane, which is permeable to water and impermeable to sucrose, were filled with various con
Gekata [30.6K]

Answer:

The options

A. A

B. B

C. C

D. E

The CORRECT ANSWER IS D.

E.

Explanation:

It is a regular occurrence for dialysis bags or dialysis tubing to be employed in permitting smooth movement of molecules when having to do with a fluid. These bags are normally evaluated to ensure that the client has adequate amount in th bag so as to be able to achieve the goal at hand.

If we have five dialysis bags being formed from a semi-permeable membrane which is impermeable to sucrose, they may be saturated with different concentrations of the sucrose with each of these bags being positioned in different beakers that have an initial amount of 0.6 M of a sucrose solution.

At ten minute intervals, the bags were massed and the weight was calculated to look for changes in the level of concentration. In this situation, the bag with the lowest initial concentration of sucrose is be the one that has its mass reducing over time and that is E.

The attached image confirms our answer as from the graph, option E shows the lowest initial concentration of sucrose.

3 0
2 years ago
A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas excha
solong [7]

Answer:

<u>Option -</u> An open circulatory system inside the adults.

Explanation:

  • A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange, and modified segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature <u>an open circulatory system</u>.
  • Most of the invertebrates like the insecticides have the open circulatory system, as the system has no specific pathways for the transportation of the materials and other essential nutrients through the medium but they have a more different mechanism in order to provide the sufficient materials to survive.
6 0
2 years ago
Read 2 more answers
A child who constantly hears negative statements about himself or herself is likely to _____.
satela [25.4K]
I'd say the answer is suffer from emotional abuse or be an overachiever
5 0
2 years ago
Read 2 more answers
Other questions:
  • Why do wilting of leaves take place in hot summer days?
    5·2 answers
  • Simulations are useful for understanding how natural processes work but are not always representative of the real world. How doe
    15·1 answer
  • What role do glucose and oxygen play in cellular respiration?
    9·2 answers
  • An ecologist studies the relationships among organisms. The work of an ecologist will most likely help solve problems related to
    9·2 answers
  • Which organs or tissues prefer to use ketone bodies such as acetoacetate as a fuel energy source instead of glucose?
    8·1 answer
  • When a plant cell, such as one from a rose stem, is submerged in a very hypotonic solution, what is likely to occur?
    5·1 answer
  • You now have reason to believe that Compound X is one of the three inhibitor samples that you tested from Hinesbiopharma. What t
    7·1 answer
  • Which tissue type is formed by many cells joining together, which are multinucleated?
    15·2 answers
  • ASAP WILL GIVE BRAINLIEST
    7·2 answers
  • What factor will most likely decrease the rate of glucose production?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!