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
snow_tiger [21]
4 years ago
13

Which statement is true?

Biology
2 answers:
DaniilM [7]4 years ago
8 0

Answer: D is correct, facts can be scientifically tested

Natalka [10]4 years ago
3 0

Answer:

D. Facts can be scientifically tested.

Explanation:

Facts are true at all times, or else they are not facts. This means that they will be correct when put against the test, whether in an experiment or through history. If it is not consistent, it is not a fact, but a theory.

~

You might be interested in
Scientists can use mutants to study metabolic pathways. These organisms have a mutation in a gene encoding a metabolic pathway e
lisabon 2012 [21]

Answer:

Pyruvate kinase

Explanation:

Yeasts convert glycerol and sugars into glyceraldehyde 3-phosphate (G3P) through independent pathways. Then, G3P forms pyruvate and, in some circumstances, pyruvate is converted in ethanol, which can be used as energy sources. If the mutation affects any reaction before G3P formation, it will only affect yeast growing either on sugar or pyruvate but not both.

Pyruvate kinase is the only enzyme on the list acting after G3P is formed and before pyruvate is formed. All other options are enzymes acting only in the formation of G3P from sugars. Meaning that only pyruvate kinase mutants will lack the ability to grow on both sugars and glycerol.

6 0
3 years ago
A peptide has the sequence of Gly-Ser-Glu-Leu-Ala-His-Gly-Arg-Leu-Ala-PheCys-Leu. (pKR=4.25, 6.0, 8.2, 12.5. Assume pKa’s of ami
Aloiza [94]

Answer:

The correct answer is option a. "7.1".

Explanation:

One easy way to determine if a peptide sequence is acidic, basic or neutral is to check for the number of amino acid residues that are acidic, basic or neutral. In this case, most amino acid residues are neutral, which mean that under neutral conditions they have a pKa close to 7.0. Particularly, the content of 3 leucine, 2 alanine and 2 glycine residues determines that the peptide have a pI of around 7.1.

8 0
4 years ago
How might evidence from an experiment such as this help shape Darwin’s ideas about evolution?
Aliun [14]
It is supported by evidence from a wide variety of scientific disciplines, including genetics, which shows that different species have similarities in their DNA. There is also evidence supporting the Theory of Evolution in paleontology and geology.
8 0
3 years ago
Name the sections of DNA that contain instructions for a specific trait.
Dimas [21]

Answer:

GENE

Explanation:

The functional segment of the DNA that contain instructions for a specific trait is known as a gene.

8 0
3 years ago
NOBLE GASES HAVE A FULL OUTER ENERGY LEVEL AND ARE INACTIVE. THESE ATOMS ARE CONSIDERED BLANK
OverLord2011 [107]
Inert

That means it does not react with other atoms
4 0
3 years ago
Other questions:
  • A human lost at sea without fresh drinking water is effectively lost in an osmotic desert. why would drinking salt water be harm
    15·1 answer
  • What is mars planet look like
    15·1 answer
  • Consider a field plot containing 200 kg of plant material. Approximately how many kg of carnivore production can be supported? A
    12·1 answer
  • Earth's greenhouse effect is most directly related to the _____ cycle.
    13·2 answers
  • Colchicine is a chemical that when applied to a cell during mitosis can be used to ""freeze"" cells in metaphase by preventing t
    14·1 answer
  • Some argue that wind power should be used more than it is now. What
    13·1 answer
  • After examining the picture, which of the following formations is most likely the oldest?
    14·2 answers
  • 13. Which DNA strand can base pair with A-T-G-C-T-A ?
    6·2 answers
  • How many ATP molecules will be required for conversion of 2-molecules of Lactic acid to Glucose?
    5·1 answer
  • Why does the electron transport chain (etc) pump protons out of the mitochondrial matrix and into the space between the membrane
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!