Q: Why do crystals have relatively sharp and well-defined melting points? Choices: - particular intermolecular forces - variable intermolecular forces - angular intermolecular forces - uniform intermolecular forces A:
uniform intermolecular forces

(Question)
Q: Bilaterally symmetrical animals have both dorsal and what type of sides? Choices: - exterior - anterior - posterior - ventral A:
(Answer)
ventral

Ques: Q: What evolutionary process may affect the distribution of a polygenic trait? Choices: - artificial selection - flow selection - characteristic selection - natural selection A:
Ans: natural selection

(Q).
Q: Telescopes use which kind of lenses to enlarge images? Choices: - crystalline - spherical - concave - convex A:
(A).
convex

Ques:Q: The distance between the crests of electromagnetic waves is called what? Choices: - trough - variation - crest - wavelength A:

Ans:wavelength

Question: Q: What branch of science is the study of human origins? Choices: - biology - pharmacology - palaeobiology - paleoanthropology A:
Answer:
paleoanthropology