Which of these is true for a fetus by the end of the first trimester of fetal
development?

A. Its breathing rate is regular.
B. It can survive outside the uterus.
c. Its organs have all formed.
D. It has a beating heart.

Can someone help me please

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

9. the history of life on earth is recorded in