During phototropism, the plant hormone auxin<span> controls cell elongation.</span>
Answer:
1. RNA
2. Cytosine and guanine
3. RNA
4. Replication
5. Unwinding the double helix
6. DNA polymerase
7. Identical
8. Repair the DNA
9. Changes in nucleotides of a DNA molecule that affect the genetic message
10. The gene for beta-galactosidase turns off.
11. p53
12. A part of DNA that does not code for a functional protein
13. Proteins
14. Transfer RNA
15. The making of an RNA molecule from a DNA strand by pairing of bases of RNA nucleotides with the complementary bases in DNA
16. 3
17. Tertiary
18. Enzymes
19. The reaction slows down.
20. The active site of an enzyme
21. 60%
22. Conserved energy
23. different
24. Gene expression
I hope that this helps you !
Answer:
A malaria outbreak causing allele frequencies to change is an example of <u><em>natural selection.</em></u>
Explanation:
Natural selection is a type of selection in which those organisms are favoured to live and reproduce which are better adapted to live in an environment. Due to natural selection, the allele frequencies of a population will tend to change with the passage of time.
When the outbreak of malaria occurs, those organisms which do not catch malaria are able to survive and pass on their characteristics to their offsprings. the other organisms die and do not reproduce. This will cause changes in the allele frequencies.
Excitable cells like those found in muscle tissue are expected to be present in higher quantities in arteries than in veins.
<h3>What are Excitable cells?</h3>
Excitable cells are defined as those cells that are capable of generating electrical impulses when stimulated. Example of such cells include:
- muscle cells( smooth, skeletal and cardiac)
The artery is made up of higher amount of smooth muscles than the veins therefore, excitable cells like those found in muscle tissue are expected to be present in higher quantities in arteries than in veins.
Learn more about muscles here:
brainly.com/question/25778330
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