Q: What is the principal cell of connective tissues? Choices: - organism - Cancer - neural - fibroblast A:
fibroblast

(Question)
Q: What two cycles make up the female reproductive cycle? Choices: - ovarian and cesarean - cervical and menstrual - digestive and menstrual - ovarian and menstrual A:
(Answer)
ovarian and menstrual

Ques: Q: What organs have tiny tubes leading to and from elastic air sacs that improve airflow and oxygen uptake? Choices: - ovaries - apendix - liver - lungs A:
Ans: lungs

(Q).
Q: What type of bonds do alkanes only contain? Choices: - hydrogen bonds - carbon-hydrogen bonds - hydrogen-carbon bonds - carbon-carbon single bonds A:
(A).
carbon-carbon single bonds

Ques:Q: A low level of radiation occurs naturally in the environment and is called what? Choices: - Gamma radiation - Beta radiation - Alpha radiation - background radiation A:

Ans:background radiation

Q: How many centimeters are in a meter? Choices: - 50 - 200 - 1000 - 100 A:
100