Q: What is the process by which the substances you consume are taken up by the blood? Choices: - evaporation - filtration - digestion - absorption A:
absorption

Q: The skeletons of humans and horses are examples of what? Choices: - pliant skeletons - exoskeletons - hydroskeleton - endoskeletons A:
endoskeletons

Q: Q: What happens when a sperm and an egg cell combine? Choices: - migration - manipulation - stimulation - fertilization A:
A: fertilization

Question: Q: Cations have what type of charge? Choices: - negative - neutral - constant - positive A:
Answer: positive

*Question*
Q: What is the only mechanism that consistently causes adaptive evolution? Choices: - genetic drift - neutral selection - artificial selection - natural selection A:
**Answer**
natural selection

*Question*
Q: What is the key to the demographic transition? Choices: - higher birth rates - higher expatriation - higher death rates - reduced family size A:
**Answer**
reduced family size