Q: Electromagnets can be controlled by controlling what type of current? Choices: - magnetic - positive - negative - electric A:
electric

Q: What explains why water molecules tend to stick together? Choices: - helium bonds - covalent bonds - mineral bonds - hydrogen bonds A:
hydrogen bonds

Q: Q: What is it called when pollen from one plant fertilizes another plant of the same species? Choices: - cross-typing - cross-breeding - cross - vegetation - cross-pollination A:
A: cross-pollination

Question: Q: What produces gametes with different alleles? Choices: - prokaryotes - anthocyanins - chromatids - heterozygotes A:
Answer: heterozygotes

*Question*
Q: Mutations that lead to cancer usually occur in genes that control the cell cycle. these include tumor-suppressor genes and what? Choices: - extinction - oncogenes - apparition - oncogenes - Darkness Oncogenes - proto-oncogenes A:
**Answer**
proto-oncogenes

Q: Q: In which direction does heat always flow through objects? Choices: - from low to high - from cooler to hotter - from left to right - from hotter to cooler A:
A: from hotter to cooler