How many years ago did flowering plants evolve?

3.5 billion

144 million

50,000

5,000

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

Which of the following is the function of the nociceptors? a. detecting odors in the nose b. detecting painful stimuli c. detecting central body temperature d. detecting touch and pressure