Angiosperms emerged
A) 100 million years ago.
B) 200 million years ago.
C) 300 million years ago.
D) 400 million years ago.
A
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Mutations:
A. can leave the protein sequence intact. B. will result in a different phenotype. C. will be corrected. D. will be passed onto offspring. E. None of the answer options is correct.
The unit of contraction that composes a muscle cell is called what?
a. troponin components b. myofilaments c. sarcomere d. sarcoplasmic reticulum
Rosalind Franklin died from ovarian cancer at the age of 37. Her cancer was probably caused by DNA mutations that
arose from _____.
a. extensive exposure to long wavelength radiation b. contaminated DNA samples c. chemical exposure d. unrepaired DNA replication errors e. extensive exposure to x-rays
Final protein refinements, storage, and packaging occur ________
A) in the cytoplasm B) in the rough endoplasmic reticulum C) in the smooth endoplasmic reticulum D) in the Golgi apparatus