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
monitta
3 years ago
13

Which statement best supports the RNA world hypothesis? a. DNA molecules are a precursor to self-replicating RNA molecules, whic

h are used to build proteins. b. Early RNA molecules were able to self-replicate, which helps to explain why all organisms share the same genetic code C. Simpler self-replicating organic molecules preceded RNA and contain genetic information. d. The absence of oxygen in Earth's early atmosphere allowed for proteins to catalyze the production of new RNA molecules.
Biology
1 answer:
vredina [299]3 years ago
3 0

Answer:

b. Early RNA molecules were able to self-replicate, which helps to explain why all organisms share the same genetic code

Explanation:

The RNA world hypothesis is an evolutionary theory that indicates the RNA-living forms were produced first before the appearance of DNA and proteins. This hypothesis is supported by the fact that RNA is capable of reproducing on its own (like DNA), and also is able to catalyze chemical reactions (like protein enzymes). The RNA world hypothesis states that this RNA world was then followed by the evolution of ribonucleoproteins.

You might be interested in
Though it is possible that REM sleep and dreaming are not necessary in the adult, REM deprivation studies seem to suggest otherw
HACTEHA [7]

Answer:

Rapid eye movement sleep (REM) may be defined as the the phase of the sleep that are unique to the mammals. This sleep is marked by the muscle tone.  

The REM leads to the increase in pressure with deprivation.  This leads to the increase in the rapid eye movement and plays an important role in the REM sleep and dreaming of the individual and quite necessary in the adult.

7 0
4 years ago
The equator is a line of latitude true or flase
grigory [225]
False false false false
5 0
3 years ago
Read 2 more answers
Autonomic dysreflexia is characterized by a. hypotension and shock. b. hypertension and bradycardia. c. pallor and vasoconstrict
omeli [17]

Answer:

B) hypertension and bradycardia.

Explanation:

Autonomic dysreflexia is a syndrome which is characterised by the sudden rise in the blood pressure of the human. The disease is common in the people with a higher level of spinal cord injuries above the T6 level.

The condition occurs when some external stimuli like pain or irritant activate the involuntary response in the body which cause the blood pressure to rise (hypertension). This leads to the slowdown of the heartbeat (bradycardia) to restore the blood pressure but the body cannot restore the blood pressure due to the damage in the spinal cord.

Thus, Option-B is the correct answer.

8 0
3 years ago
PLEASE HELP MEEE. _______ and _____
Black_prince [1.1K]

In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.

3 0
3 years ago
In correct chronological order, the three phases of the human ovarian cycle are
Alja [10]
The three phases of the human ovarian cycle are:

<span><span>1.               </span>Follicular phase</span>
This is a phase controlled by estradiol, during which follicles in the ovary mature.
<span><span>2.               </span>Ovulation</span>
This is a phase in which eggs are released from the ovaries when the follicles rupture.
<span><span>3.               </span>Luteal phase</span>
<span>This is the phase is under the control of progesterone. At the beginning of luteal phase, corpus luteum is formed and it ends in either pregnancy or luteolysis.</span>
4 0
3 years ago
Other questions:
  • What shape are the plasmid present in Eubacteria?
    5·1 answer
  • _____ is a severe infection caused by group a strep bacteria, which are also known as flesh-eating bacteria.​
    15·1 answer
  • What scientist studied how wounds heal and proposed that cells come from preexisting cells
    10·2 answers
  • Whales are mammals that live in the ocean and swim like fish. Which characteristic in whales prevents them from being classified
    5·2 answers
  • Are Sea Anemones living or non-living? *<br> living<br> O non-living
    13·1 answer
  • Why is it not acceptable to say that the mesosaurus could have traversed from one continent to another via the ocean?
    8·1 answer
  • Organ made up of masses of aveoli
    7·1 answer
  • a population of 100 insects that live in an area 100 square meters has a density of 1 insect per square meter. what’s this an ex
    13·1 answer
  • Adrenocorticotropic hormone​
    14·1 answer
  • Using energy from a vehicle to recharge the battery when slowing down or stopping the vehicle is called what?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!