Q: Catecholamines are a class of amine hormones synthesised form which amino acid? Choices: - epinephrine - dopamine - phenylalanine - tyrosine A:
tyrosine

Q: How many millions of years ago did pangaea begin breaking apart? Choices: - 600 - 400 - 500 - 250 A:
250

Q: Q: The white fluffy part of popcorn is also what? Choices: - phosphor - membrane - jiffy - endosperm A:
A: endosperm

Question: Q: Each cell and every living thing requires what? Choices: - potassium - calcium - salt - energy A:
Answer: energy

*Question*
Q: What do gametes undergo to produce many additional copies of themselves? Choices: - prophase - angiogenesis - cytokinesis - mitosis A:
**Answer**
mitosis

(Q).
Q: What body system consists of organs that break down food, absorb nutrients, and eliminate waste? Choices: - lymphatic system - hormonal system - skeletal system - digestive system A:
(A).
digestive system