Uracil forms a complementary pair with __________ in RNA and __________ in DNA
a. adenine; adenine
b. adenine; thymine
c. thymine; thymine
d. uracil; adenine
e. adenine; uracil
A
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The first dinosaur fossils were discovered in ____, leading to the first public dinosaur craze
a. Britain b. Australia c. United States d. South Africa e. China
Copper (Cu) is considered a micronutrient.
Answer the following statement true (T) or false (F)
Why is variegation in four o'clock plants determined by the phenotype of the ovule source?
A) The mitochondria determine the leaf coloration, and the mitochondria are inherited through the ovule. B) Dominant genes demonstrating variegation come from the ovule. C) Recessive genes demonstrating variegation come from the ovule. D) The ovule nuclear genome contains the genes for leaf coloration. E) The chloroplasts determine the leaf coloration, and the chloroplasts are inherited through the ovule.
In humans, the male determines the sex of the child because males have
A) one X and one Y chromosome. B) two X chromosomes. C) 46 chromosomes. D) two Y chromosomes.