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
Akimi4 [234]
3 years ago
9

PLS ANSWER CORRECTLY!!

Biology
2 answers:
Viktor [21]3 years ago
7 0

Answer:

Carbon dioxide (CO)2

Water (H2O)

From the soil and air

The water is changed into oxygen and the carbon is changed to glucose

AKA: Sugar

Explanation:

yanalaym [24]3 years ago
4 0
The substances they need are carbon dioxide, water, and chlorophyll, and the substances produced by photosynthesis is 1 glucose molecule and 6 oxygen molecules
You might be interested in
A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years
gregori [183]

Answer:To put dates on events in evolutionary history, biologists count how many mutations have accumulated over time in a species’ genes. But these “molecular clocks” can be fickle. A paper in the 28 September Physical Review Letters mathematically relates erratic “ticking” of the clock to properties of the DNA sequence. Researchers may eventually use the results to select which genes make the best clocks.

Although mutations in DNA are rare, they are crucial for evolution. Each mutation in a gene changes one small piece of a protein molecule’s structure–sometimes rendering it non-functional and occasionally improving it. The vast majority of mutations, however, neither hurt nor help, often because they affect an unimportant part of their protein. Such a “neutral” mutation usually dies out over the generations, but occasionally one proliferates until virtually every individual has it, permanently “fixing” the mutation in the evolving species.

Over thousands of generations, these fixed mutations accumulate. To gauge the time since two species diverged from a common ancestor, biologists count the number of differences between stretches of their DNA. But different DNA segments (genes) often give different answers, and those answers differ by much more than would be expected if the average rate of mutations remained constant over evolutionary time. Sometimes they also disagree with dates inferred from fossils. Now Alpan Raval, of the Keck Graduate Institute and Claremont Graduate University, both in Claremont, California, has put precise mathematical limits on this variation.

Raval’s work is based on representing possible DNA sequences for a gene as a network of interconnected points or “nodes.” Each point represents a version of the gene sequence that differs by exactly one neutral mutation–a single DNA “letter”–from its immediate neighbors. The network contains only neutral mutations; non-functional versions of the sequence aren’t part of the network.

Models and simulations had suggested that if the number of neighbors varies from point to point–that is, if some sequences allow more neutral mutations than others–mutations accumulate erratically over time, making the molecular clock unreliable. Raval calculates precise limits on how unsteady the clock could get, based on properties of the network, such as the average number of neighbors for each node or the number of “jumps” connecting any two randomly chosen nodes. “The great strength of this paper is that it’s now mathematically worked out in much more detail than before,” says Erik van Nimwegen of the University of Basel and the Swiss Institute of Bioinformatics in Switzerland, who developed the framework that Raval uses.

Still, the relevant network properties are “not very intuitive,” van Nimwegen observes. Raval agrees. “The real question from this point on would be to identify what kinds of proteins would be good molecular clocks.” He says that according to his results, for a protein to be a good clock, “virtually all single mutations [should] be neutral”–many neighbors per node–but “as you start accumulating double and triple mutants, it should quickly become dysfunctional.” Raval is working to relate these network features to protein properties that researchers could measure in the lab.

Researchers have suggested other explanations for the erratic behavior of molecular clocks, such as variations in the mutation rate because of changes in the environment. But such environmental changes are relatively fast, so their effect should average out over evolutionary time, says David Cutler of Emory University in Atlanta. He says that in network models, by contrast, changes in the mutation rate are naturally slow because the point representing the current sequence moves slowly around the network as mutations accumulate.

Explanation:

4 0
3 years ago
Read 2 more answers
Which two animals is the tiger most closely related to
Dominik [7]
The lion and bobcat......
4 0
3 years ago
All living things are eaither Eukarya, Bacteria, or Archaea. What are these broadest categories in the classification of life ca
bixtya [17]
 <span>hierarchical is the broadest categories in the classification of life is called.</span>
5 0
3 years ago
Was the scientist who developed the inactivated polio vaccine.
Naddika [18.5K]

Answer:

Jonas Salk

Explanation:

  • The vaccine that is used for the prevention of polio caused due to the infection caused by the poliovirus is known as polio vaccines. 
  • The first successful polio vaccine was developed by Jonas Salk in the year 1952 and the success of the field trials was announced in the year 1955. 
  • This vaccine became famous as the Salk polio vaccine which is 60-70% effective against PV1 and 90% against PV2 and PV3. 
  • This vaccine was an inactivated vaccine. 
4 0
3 years ago
A point mutation changes the DNA sequence CGA to CGT, but the same protein is still produced. Which point mutation occurred? A.
iren [92.7K]
The answer is <span>C.silent.

Nonsense, missense, silent, and frameshift mutations are point mutations. The point mutations are the change in a single nucleotide base on the DNA molecule. In a missense mutation, the change in a single nucleotide base results in a codon coding for a different amino acid. In a nonsense mutation, the change in a single nucleotide results in a stop codon or in a nonsense codon. Frameshift mutation, due to addition or deletion of a base, results in the change of reading frame and totally different translation. In all these cases, the change could lead to different of nonfunctional protein translation.
Silent mutation, on the other, means that change in a nucleotide base will no affect amino acid. It will result in a different codon, but the one that code for the same amino acid, so the same protein will be produced.

</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following statements is correct? a)All animals share a common ancestor. b)Sponges are diploblastic animals. c)Eumet
    11·1 answer
  • What is the energy associated with the creation of a molecule?
    8·1 answer
  • Why is genetic variation important to the process of evolution?
    12·1 answer
  • A recessive gene located on the X chromosome is the cause of hemophilia in affected individuals. Males are more likely to have h
    12·1 answer
  • How does latitude affect the amount of solar radiation the Earth receives?
    5·1 answer
  • Which of the following objects is NOT a part of our solar system? A. the North Star B. the dwarf planet Pluto C. the asteroid be
    7·2 answers
  • Cells
    10·1 answer
  • Select all that apply.
    11·2 answers
  • Why does the presence of predators help keep an ecosystem stable?
    10·1 answer
  • A) 5%<br>B)10%<br>C)50%<br>D)100%​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!