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lisov135 [29]
2 years ago
10

What type of mutation involves changing one letter to another letter in a DNA strand.

Biology
1 answer:
igomit [66]2 years ago
4 0

Answer:

Substitution

Explanation:

Substitution is when one letter is switched out for another.

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How fertilization occur in flowering plant​
Ghella [55]
Answer: For flowering plants, fertilization occurs through a process known as double fertilization. Unlike most plants, double fertilization enables the new seed to grow into a new plant and have a food source to begin growing. Double fertilization occurs within the female part of a plant, the pistol.

explanation: When pollen is formed by the anther, or male part of a plant, it will blow in the wind or attach to an organism that carries it to the top of the pistol, known as the stigma. Once the pollen attaches to the stigma, the pollen germinates and forms a pollen tube that extends into the ovary. Once formed, two sperm cells will be released and fertilize both the egg and the two polar nuclei of the plant to form the zygote and endosperm, respectfully.
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where does urine comes from? kidney stores the urine, and intestine digest it right? in the human body, the kidney is behind the
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Answer:

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2 years ago
Each lung is fed oxygen by a separate bronchus. Please select the best answer from the choices provided. T F
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5 0
3 years ago
Read 2 more answers
How have scientist started to study relationships between different groups of organisms?
Delicious77 [7]
<h2>Answer:</h2>

The scientist started to study relationships among various groups of organisms <u>C. by using genetic analyses</u>.

<h2>Explanation:</h2>

The following features were used to study about the relationships between different groups of organism:

  • External morphology
  • Similarities in structure
  • Genetic analysis
  • Chemical composition

The molecular similarities in the structure of RNA, DNA, and proteins help to establish the relationship of relationships between different groups of organisms. This was studied through testing the samples obtained by organisms using genetic analyses.

7 0
2 years ago
If one is experiencing difficulty sleeping, like with insomnia, he or she may go to their family doctor. What type of drug is th
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Answer: Hypnotics  

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If someone has sleepless night for more than 3 days a week then it will be considered as insomnia. The concerned person can go the family doctor as these drugs are not sold without prescription.

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The drug is basically used to treat the medical condition of insomnia pr surgical anesthesia.

5 0
3 years ago
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