Which choice regarding dna replication is true? a mistake in dna replication never occurs b a change in amino acid sequence is inherent in mistake in dna replication c mistake in dna replication are a mechanism evolutionary change d mistake in dna replication are a direct respond to the organism's environmental cues

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

What is the difference between sex-linked traits and autosomal traits in humans? a. sex-linked traits can only be passed from fathers to sons, while autosomal traits can be passed on from both parents to offspring of any sex. b. sex-linked traits are passed on through the x and y chromosomes, while autosomal traits are passed on through the other 22 chromosomes. c. sex-linked traits only affect females, while autosomal traits affect both males and females. d. sex-linked traits refer to genes that are on the x and y chromosomes, while autosomal traits refer to genes on all 23 chromosomes.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm