3. The half-life of carbon-14 is about 5600 years. A
fossil with 1/4 the normal
proportion of C4 is
probably
years
old.

A. 2,800
B. 11,200
C. 22,400

What is a codon and where is it found

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.

Creating new things to solve problems and improve life depends on the close interaction of which two fields?