Which of the following is single-stranded, found throughout the cell, and has the bases a, c, u, and g?

question 3 options:

dna

rna

both dna and rna

neither dna nor rna

Apart of an ecosystem that can restrict the growth of a population is referred to as

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

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.