Ques: Q: Which part of a leaf contains openings known as stomata, through which the exchange of gases takes place? Choices: - stoma - cuticle - phloem - epidermis A:
Ans: epidermis

Ques: Q: Supercontinents have formed at least how many times in earth history? Choices: - twenty - nine - two - five A:
Ans: five

Ques: Q: For feeding, the head contains one pair of mandibles and two pairs of what? Choices: - tracheae - antennae - chelicerae - maxillae A:
Ans: maxillae

Ques: Q: What is the smallest unit capable of life known as? Choices: - living thing - organism - insect - a cell A:
Ans:
a cell