Q: Every chemical reaction between molecules involves breaking and forming of what? Choices: - orbits - ions - atomic pathways - bonds A:
bonds

(Question)
Q: What do we call a peptide hormone composed of nine amino acids that lowers blood pressure? Choices: - angiotensin - parcnid - bufotenin - bradykinin A:
(Answer)
bradykinin

Ques: Q: What is the term for a natural situation which arises to physically divide organisms? Choices: - assimilation - reproduction - extinction - vicariance A:
Ans: vicariance

(Q).
Q: Which type of tree loses its leaves each fall and remains leafless in the winter? Choices: - perennial - conifer - annual - deciduous A:
(A).
deciduous

Ques:Q: What help should you use for disposing hazardous products? Choices: - biohazard unit - call poison control - first aid kit - guidelines on label A:

Ans:guidelines on label

Ques: Q: What reproductive part is stored in a plant's pollen? Choices: - the gamete - the mimic - the egg - the sperm A:
Ans:
the sperm