HELP, ITS A BRAINPOP QUESTION ABOUT GENETICS How do mutations affect natural selection?

A. They slow down the process

B. They prevent organisms from evolving

C. They affect how likely an organism is to survive and reproduce

D. They are the leading cause of extinction

What is the next step in muscle contraction after the actin changes shape? (apex)

Step 1 review the imaginary strand of dna below. note the complementary base pairs. a g c a a t c c g t c t t g g t c g t t a g g c a g a a c c step 2 to begin replicating this strand of dna, draw the two sides of the strand separating. step 3 now, draw the free-floating bases linking up with the separate sides. remember to follow the rules of complementary base pairing. step 4 draw the two resulting dna strands.

At the age of 6 months, caleb was diagnosed with tay-sachs disease. as his primary care physician, what would you tell his parents about this disease?