Fill in the blanks with appropriate option.
A newly formed mRNA in eukaryotes (or pre-mRNA) produced by DNA in the nucleus contains sections known as that code for proteins along with sections called that do not code for proteins. Before the pre-mRNA leaves the nucleus, it is processed to remove the and produce a functional mRNA that leaves the nucleus and takes the genetic information to the .
Options:
a. ribosomes
b. intrones
c. exons
d. nucleus

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

Contrast how pollination is different among gymnosperms and angiosperms.

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.