Answer:
Life on Earth began more than 3 billion years ago, evolving from the most basic of microbes into a dazzling array of complexity over time. But how did the first organisms on the only known home to life in the universe develop from the primordial soup? One theory involved a "shocking" start. Another idea is utterly chilling. And one theory is out of this world! Inside you'll learn just how mysterious this all is, as we reveal the different scientific theories on the origins of life on Earth.Electric sparks can generate amino acids and sugars from an atmosphere loaded with water, methane, ammonia and hydrogen, as was shown in the famous Miller-Urey experiment reported in 1953, suggesting that lightning might have helped create the key building blocks of life on Earth in its early days. Over millions of years, larger and more complex molecules could form. Although research since then has revealed the early atmosphere of Earth was actually hydrogen-poor, scientists have suggested that volcanic clouds in the early atmosphere might have held methane, ammonia and hydrogen and been filled with lightning as well. The first molecules of life might have met on clay, according to an idea elaborated by organic chemist Alexander Graham Cairns-Smith at the University of Glasgow in Scotland. These surfaces might not only have concentrated these organic compounds together, but also helped organize them into patterns much like our genes do now. The main role of DNA is to store information on how other molecules should be arranged. Genetic sequences in DNA are essentially instructions on how amino acids should be arranged in proteins. Cairns-Smith suggests that mineral crystals in clay could have arranged organic molecules into organized patterns. After a while, organic molecules took over this job and organized themselves.
Explanation:
Which cell does not have a nucleus
According to paragraph 1, which of the following factors limits the abilities of populations within an ecosystem to survive?
Answer:
Availability of space, shelter, food, and water
According to paragraph 1, the factor that limits the abilities of populations within an ecosystem to survive is the availability of space, shelter, food, and water that is present in option C.
What are the ecosystem's limiting factors?Ecosystems are composed of living organisms and the nonliving elements with which they interact, including air, water, soil, and sunlight. Within an ecosystem, all organisms have certain requirements for survival, such as the need for space, shelter, food, and water. These resources are often limited within any given ecosystem, which means that populations within the ecosystem are limited in terms of their ability to survive and reproduce.
Hence, the factor that limits the abilities of populations within an ecosystem to survive is the availability of space, shelter, food, and water that are present in Option C.
Learn more about the ecosystem's limiting factors here.
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question is incomplete, complete question here
According to paragraph 1, which of the following factors limits the abilities of populations within an ecosystem to survive?
A)The frequency of reproduction of each species
B)The number of organisms becomes too large
C)Availability of , space, shelter, food, and water
D)Availability of a diversity of species
The white-tailed ptarmigan lives at high elevations on mountains that receive a lot of snow in the winter. During the summer, the ptarmigans’ feathers are mottled brown. The birds lose the brown feathers and grow a new set of white feathers during the winter. Scientists are concerned that rising global temperatures will affect the white-tailed ptarmigan. If global climate change leads to the elimination of snow in the habitat of white-tailed ptarmigans, which adaptation is most likely to occur over many generations?
Answer:
The birds will no longer molt brown feathers for white ones.
Explanation:
Over time the birds with white feathers will slowly die off (mostly dude to predators), and over time the birds will likely no longer have white feathers, and they will no longer molt from brown to white and white to brown. The feathers will likely stay brown year round.
Fossils are used to determine a likely pattern of how vertebrates have changed over time.
Please select the best answer from the choices provided
T
F
Answer:
I believe so. The shapes and ect. of bones determine how animals are evolving and how they will evolve more.
Explanation:
I hope this helps by the way. I'm not completely sure tho.
5. Name the correct substrates for the following enzymes.
(i) Trypsin
(ii) Amylase
(iii) Pepsin
(iv) Lipase
➜ Trypsin ⇢ Protein.
Amylase ⇢ Starch.
Pepsin ⇢ Protein.
Lipase ⇢ Fats.
According to its location on the periodic table, sodium can be described as
A an alkaline-earth metal.
B a transition metal.
C an alkali metal.
D a metalloid.
Original Chromosome: ABCJKL Which of the following depicts a
translocation chromosomal mutation?
A.) ABBC*JJKL
B.) AC*JKL
C.) ABC*MNO
D.) AJK*LBC
Answer:
A.)
Explanation:
Describe what would happen to mass and weight if you were on
the moon.
Answer:
the moon's weight is less than the Earth so the moon will not pull objects toward itself at the strength of the Earth. This means that if you went to the moon you would weigh less, even though your mass stays the same
Explanation:
I hope this helps :)
I NEED THIS ASAP!!!! PLEASE!!
___1. Organisms that make their own food A. Chloroplasts
___ 2. Site of photosynthesis B. Aerobic
___ 3. Organism that must consume other organisms C. Glucose
to obtain energy. D. Mitochondria
___ 4. C6H12O6 E. Glycolysis
___ 5. Process requires oxygen F. Cytoplasm
___ 6. Adenosine diphosphate G. ADP
___ 7. During aerobic respiration, the most ATP H. Autotrophs
is produced during this process. I. ATP
___ 8. The anaerobic process of splitting glucose J. Anaerobic
and forming two molecules of pyruvic acid K. Electron Transport Chain
___ 9. Place where glycolysis occurs L. Heterotroph
___10. Place where the Krebs cycle occurs M. Mitochondria
___11. Process does not require oxygen
___12. Energy storing molecule
Answer:
___ 1. Organisms that make their own food
H. Autotrophs
___ 2. Site of photosynthesis
A. Chloroplasts
___ 3. Organism that must consume other organisms to obtain energy.
L. Heterotroph
___ 4. C6H12O6
C. Glucose
___ 5. Process requires oxygen
B. Aerobic
___ 6. Adenosine diphosphate
G. ADP
___ 7. During aerobic respiration, the most ATP is produced during this process.
K. Electron Transport Chain
___ 8. The anaerobic process of splitting glucose and forming two molecules of pyruvic acid
E. Glycolysis
___ 9. Place where glycolysis occurs
F. Cytoplasm
___10. Place where the Krebs cycle occurs
D. Mitochondria
___11. Process does not require oxygen
J. Anaerobic
___12. Energy storing molecule
I. ATP
Which of the following is not a rock type?
a. igneous
b. sedimentary
C. cubic
d metamorphic
Answer:
C. Cubic!!! Hope this helps!
Explanation:
Which is the largest gland in the human body ?
Give an example of an organism whose digestion is intracellular.
These are VSQ, so pls answer in one word.
➜ Liver.
➜ Amoeba.
Intracellular digestion is the form of the digestion which takes place in the cytoplasm of the cell.Answer:
Liver is the largest gland in the human body.
Ameba.
Complete the chart. Thymine _____, Guanine ____.
Answer: 27, 23
Explanation: Thymine goes with Adenine and together they equal 50 so Thymine would be 27 because Adenine is 23. Same with Cytosine and Guanine. They go together and equal 50 so Guanine would be 23 because Cytosine is 27. Hope this helps!
PLEASE HELP!!
What type of chemical is used to kill bugs?
rodenticide
insecticide
herbicide
fungicide
Answer:
It is insecticide
Answer:
insecticide
Explanation:
i took the quiz and looked it up : )
what does as scientific theory compare to a scientific law?
Which structure is found most likely in green plant cells but not in animal cells?
A. Large vesicle
B. Mitochrondrion
C. Cell membrane
D. Nucleus
There are three domains _____________, ______________, and _____________
Answer:
Bacteria , Archaea , Eukaryota.
What are three three terms used to describe organisms such as humans
Answer:
This is your answer . If I'm right so,
Please mark me as brainliest. thanks!!!
Do two organisms that express the same trait have to
carry the same genetic information?
Answer:
Any organism that receives the same genetic information for a trait from each parent. Also, any organism that has either two dominant or two recessive genes dominant trait, therefore the trait will show in a hybrid.
A cat runs 6 m in 4 sec. What is its speed?
Answer:
3.36 miles per hour
Explanation:
I looked it up on a special calculator
HELP PLEASE!!!
A. Describe the difference between gradualism and punctuated equilibrium.
B. Describe the conditions under which new species may arise.
C. Explain the difference between allopatric and sympatric speciation.
D. Describe the role of prezygotic and postzygotic barriers in the process of speciation.
A. Both theories describe the rates of speciation. For Gradualism, changes in species is slow and gradual, occurring in small periodic changes in the gene pool, whereas for Punctuated Equilibrium, evolution occurs in spurts of relatively rapid change with long periods of non-change.
B. New species arise through a process called speciation. In speciation, an ancestral species splits into two or more descendant species that are genetically different from one another and can no longer interbreed.
C. Allopatric speciation occurs when two species are living in separate environments and therefore there is no gene flow between the populations. ... Sympatric speciation occurs when two species are living in the same environment.
D. Reproductive isolation is a mechanism that keeps species from mating with others. Prezygotic isolation prevents the fertilization of eggs while postzygotic isolation prevents the formation of fertile offspring. ... Postzygotic mechanisms include hybrid inviability, hybrid sterility and hybrid "breakdown."
What are some of the main characteristics of cardiac muscle that make them distinct from the other two types of muscle cells? Why are these characteristics important for understanding the functions of cardiac muscle?
Answer:Four characteristics define cardiac muscle tissue cells: they are involuntary and intrinsically controlled, striated, branched, and single nucleated.
Explanation:on
Please do all for 50 points,
please.
All human beings differ from one another by roughly what percentage of their total DNA?
Answer:
All human beings are 99.9 percent identical in their genetic makeup. Differences in the remaining 0.1 percent hold important clues about the causes of diseases.
Which of the following genotypes result in both having the same phenotype?
Will give brainliest only answer if you know it!
GIVING BRAINLIEST!!!
What is a similarity between reduced space and a lack of food?
A) They both cause animals to move where there are less resources.
B) They both affect prey more than they affect predators.
C) They can both cause animals to move to a new environment.
D) They both affect plants more than they affect animals.
The similarity between reduced space and a lack of food is the option "C" they can both cause animals to move to a new environment.
How does population affect resources?Prompt population growth continues to be a significant underlying force of environmental degradation and a hazard to the sustainable use of natural resources.
It diminishes the quality and quantity of natural resources through overexploitation, intensive farming and land fragmentation.
Thus, option "C" is correct.
To learn more about the population click here:
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What are the three states or forms water can be found in?
Choose 1-3 activities that you perform regularly and explain the role(s) that each organ system plays in each activity, as well as explain how organ systems work together to perform the chosen activities.
Plz help me i need it done
Answer:
4.) Atmosphere
5.) Moons
6.) Orbit
7.) Inner Planets
8.) Terrestrial
Explanation:
Which 3 are the biggest problem facing our environment today. (choose only 3)
Maintaining Biodiversity
Pollution
Habitat destruction
Resource use
Deforeststation
Population growth
Answer:
pollution
deforestation
population growth
This is a picture of a coordinate graph.
Which ordered pair describes a point that is located 4 units to the left of the origin and 6 units below the x-axis?
(4, −6)
(6, −4)
(−4, −6)
(−6, −4)
Answer:
This is not biology.