Many scientific explanations for the origin of DNA and life have been proposed over the years. These hypotheses explain how
inorganic molecules became organic monomers, such as amino acids, sugars, phosphates, and bases. But this still didn't explain
where living things came from. If macromolecules were able to form on early Earth, this still leaves us with the question of how
the polymers would have become self-replicating, a basic criteria for life. There are several ideas but little certainty. Some of the
common ideas include: the RNA world hypothesis, the genes first hypothesis, and the metabolism first hypothesis."
Which of these statements is proposed by the genes first hypothesis?
A)
RNA is highly stable.
B)
The first life forms were self-replicating nucleic acids, such as RNA or DNA
RNA is able to store and pass on genetic information.
D)
RNA contains less nitrogen bases than DNA and thus, is a simpler molecule.
E)
Ribosomal RNA (TRNA) and transfer RNA (TRNA) are the primary molecules
responsible for protein synthesis.
Answers
The first life forms were self-replicating nucleic acids, such as RNA or DNA, RNA is able to store and pass on genetic information.
What is the difference between RNA and DNA?There are two differences that determine DNA from RNA,
(a) RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose, and
(b) RNA has the nucleobase uracil while DNA contains thymine.
Thus, options, A and C are correct, RNA is adapt of both storing genetic data and catalyzing chemical responses.
To learn more about the RNA click here:
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Answers
Answer:
Weather: "Hurricane", "Lightening", "Tornado", "A pattern of changes happening around the world over many years", "Tells you how to dress for that day", "Heat wave", "Specific event or condition that happens over a period of hours or days", "Short Term", "A thunderstorm, a snowstorm, and today's temperature", "Include wind, temperature, humidity, atmospheric pressure, cloudiness, and precipitation", "The condition of the atmosphere at a particular place and time".
Climate: "The average weather conditions in a place over many years", "Highly variable day to day, and from one year to the next", Minneapolis is cold and snowy in the winter, while Miami's is hot and humid", "Tells you what wardrobe to own", "Usually taken over 30 plus years", "Annual Rainfall", "Drought", "Long Term", "Ice Age", "Determined by lattitude, bodies of water and altitude".
Explanation:
which two layers of the atmosphere are responsible for the majority of solar radiation absorption?
Answers
Answer:
The stratosphere and thermosphere.
Explanation:
1) Which of the following are scales of
ecosystems?
a. Micro
b. Macro
C. Messo
d. Ecotone
Answers
Answer:
Messo
Explanation:
Which of the following would not be considered evidence that supports the modern theory of evolution?
a. The embryonic structures of many organisms appear similar and they share characteristics like gills and tails during early development.
b. Fossils are discovered that show gradual changes in the physical characteristics of a species over time.
c. Analogous structures, like bird and bat wings, show us that these organisms inherited wings from a recent common ancestor.
d. DNA of organisms that are theorized to be closely related often shares a lot of similarities.
Answers
Answer:
a
Explanation:
If a recessive trait is expressed in an organism’s phenotype, what can you determine about its genotype?
a. Both alleles in the genotype are recessive.
b. At least one allele in the genotype is recessive.
c. You cannot determine anything about the organism’s genotype.
d. Both alleles in the genotype are dominant.
Answers
Water that infiltrates into the ground is called ___________.
A. runoff
B. groundwater
C. precipitation
Answers
Answer: B Infiltration
Explanation: The process by which water penetrates the ground to become groundwater is called b. infiltration. Runoff is water that flows on the earth's surface after a shower of rain. This water usually flows into rivers or streams. Precipitation can occur as rainfall, snow, hail or sleet and falls from clouds when condensation occurs. Transportation is the process by which trees release water vapor into the atmosphere via stomata in the leaves.
Answer:
B-Groundwater
Explanation:
Think about it lol "Water that infiltrates into the ground" which word has ground and water in it
Correct you got it right it is "groundwater"
You are officially big brain
Is this person male or female? Why?
Answers
Answer:
I can't tell you why, but I think the person is male.
What particles can move through the dialysis
tubing, do you think?
Answers
Answer:
Glucose, starch and iodine (potassium iodide) will pass through the membrane of the dialysis tubing.
When a pelican gets hot, it opens its bill and flutters the sides of its pouch. This causes water to evaporate, which cools the pelican. What type of adaptation is the movement of the pelican’s pouch?
behavioral adaptation
life-cycle adaptation
physical adaptation
reproductive adaptation
Answers
Answer:
Behavioral adaptation
Explanation:
life-cycle adaptation would be like a tadpole growing legs.
physical adaptation would be a change in the animals body like wings for a bat.
reproductive would be beneficial for making offspring like a peacocks bright feathers that attract mates.
Behavioral adaptations are responses to external stimulus like heat.
So behavioral is the best option.
What is the medicine called that helps kill bacteria?
Answers
Answer:
Antibiotics....................
Please help.................
Answers
Answer:
C i think.......................................
Do convection currents exist in Earth's crust?
Answers
Answer:
yes convection currents occur in earth's crust I hope this helps
What occurs when someone exhales? A. The rib cage contracts, but the diaphragm relaxes. B. Both the rib cage and the diaphragm relax C. Both the rib cage and the diaphragm contract. D. The rib cage relaxes, but the diaphragm contracts
Answers
Answer:
Answer is A ............
Edit: its actually D... i just verified
Answer:
The answer be D if you doubt you can try out the practical yourself.
can some one plz help me on this question its hard :( ill give brainliest
Answers
The climate influences ________
A. Plant growth
B. Biodiversity
C. Adaptions of land organisms
D. All of the above
Answers
Answer:
D
Explanation:
How can the appearance of white baby rabbits be explained when the mother has white fur, and the father has black fur?
Answers
Answer:
white fur is dominant and the mother is WW
Explanation:
W=white fur
w=Black fur
The energy that powers photosynthesis comes from
A. oxygen.
B. water.
C. the sun.
D. chemicals.
Answers
Answer:
sun but am not so sure about it
can you please answer these questions for me I really need help I am begging you
Answers
Answer:
1: 75%
2: 75%
3: 50%
4: 25%
What information does the rocks tell us? List three things
Answers
The role of a pioneer species in primary succession is to change a bare habitat into Abe that is suitable for other organisms. A species that is responsible for primary succession in an ecosystem is most likely able to-
A.)live at high altitudes
B.)migrate during the winter
C.)survive any predator
D.)carry out photosynthesis
Answers
If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), later analysis will show that all of the following molecules produced by the algae contain 18O except If photosynthesizing green algae are provided with CO2 containing heavy oxygen (18O), later analysis will show that all of the following molecules produced by the algae contain 18O except ribulose bisphosphate (RuBP). O2. 3-phosphoglycerate. glucose. glyceraldehyde 3-phosphate (G3P).
Answers
Answer:
Option B, O2
Explanation:
It is because the oxygen released during the process of photosynthesis comes from the water absorbed by the roots and not by the CO2containing heavy oxygen (18O). In fact oxygen from CO2 containing heavy oxygen (18O) is used in making sugar which is then stored for energy.
Hence, option B is correct
Which best describes the effect on weather in an area if low clouds cover the sky during the daytime?
Answers
Answer:
Explanation:
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
What is science, what is your own definition of science to you.
Answers
Answer:
The way that the Universe works, the way that different things in life contribute to one another.
Explanation:
Dang, that got deep real quick
science can be defined as all about the nature.
what is the main component of plasma
Answers
Answer:Albumin
Plasma is the liquid component of blood, in which the red blood cells, white blood cells, and platelets are suspended. It constitutes more than half of the blood's volume and consists mostly of water that contains dissolved salts (electrolytes) and proteins. The major protein in plasma is albumin.
Explanation:
Helped by none other than the #QUEEN herself aka #DRIPPQUEENMO
how does a competition between animals help create a healthy forest?
Answers
Answer:
Making modifications to increase their chances of survival and reproduction.
Explanation:
hope this helps:)
Which structure separates an animal cell from its surrounding environment? (1 point) 1 Golgi apparatus 2 plasma membrane 3 nuclear membrane 4 central vacuole
Answers
Answer:
2) plasma membrane
Explanation:
The structure that separates the cell from its surrounding is plasma membrane, the correct option is 2.
What is plasma membrane?The plasma membrane, also renowned as the cell membrane, is the membrane located outside all cells that distinguishes the cell's interior from its surroundings.
A cell wall is attached to the plasma membrane on the outer of the plasma membrane of bacterial and plant cells.
The semi-fluid living matter in the cell is called protoplasm or in other words simply plasm. This living matter, or one can say plasm, is contained within the plasma membrane, a biological membrane.
Lipids which are phospholipids and cholesterol, proteins, and carbohydrate groups attached to some of the lipids as well as proteins are the primary components of the plasma membrane.
A phospholipid is a sort of lipid that is created by glycerol, two fatty acid tails, and a phosphate-linked head group.
Thus, the correct option is 2.
For more details regarding plasma membrane, visit:
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Someone plz help me! ☺️
Answers
Which two words best describe the Sun? Select one:
A)planet and gases
B)star and rocky
C) star and gases
D)planet and rocky
Answers
Answer:
I'm pretty sure it would be c
Explanation:
because it is a star so it definitely is not a or d and I don't think it is rocky soooo
In rabbits, the gene for black fur is dominant over the gene for white fur. How can the appearance of white baby rabbits be explained when the mother has white fur, and the father has black fur?
Answers
Answer:
it is going to xx or xy those genes of the father and the father
I need a small text (about 50 words) for the human brain.
Answers
Answer:
The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles. The human brain has the same basic structure as other mammal brains but is larger in relation to body size than any other brains.The largest part of the human brain is the cerebrum, which is divided into two hemispheres, according to the Mayfield Clinic. Underneath lies the brainstem, and behind that sits the cerebellum. The outermost layer of the cerebrum is the cerebral cortex, which consists of four lobes: the frontal, parietal, temporal and occipital. [Nervous System: Facts, Functions & Diseases]
Like all vertebrate brains, the human brain develops from three sections known as the forebrain, midbrain and hindbrain. Each of these contains fluid-filled cavities called ventricles. The forebrain develops into the cerebrum and underlying structures; the midbrain becomes part of the brainstem; and the hindbrain gives rise to regions of the brainstem and the cerebellum.
Explanation: