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Usually mutations have deleterious effects to the organism, but occasionally there are beneficial mutations. Such mutations drive evolution.
No, the correct statement is: That is mine.
Mutations in certain genes cause tumors. Gucci.
Mutations is the correct answer.
Some mutations can be deadly, harmful, or have no effect. Correct, not all mutations are harmful. Some mutations could even have a positive effect and help the creature adapt.
To take back (or retract) a statement means to say that the statement was not correct, or is no longer correct.
Yes, that is a grammatical statement.
proofread
That is correct.
That is the correct spelling for statement (account, report).
A statement that is factually correct and does not mislead.
sexual reproduction and mutations provide variation among species