Q: Although what biochemicals circulate throughout the body and come into contact with many different cell types, they only affect cells that possess the necessary receptors? Choices: - Cells - organs - enzymes - hormones A:
hormones

Q: Flatworms reproduce sexually. in most species, the same individuals produce both what? Choices: - gametes - heart and sperm - diploid and haploid - eggs and sperm A:
eggs and sperm

Q: Q: Lipids are organic compounds that consist of carbon, hydrogen, and? Choices: - nitrogen - methane - helium - oxygen A:
A: oxygen

Question: Q: Differences in density between water and air lead to differences in what? Choices: - resistance - sound - energy - pressure A:
Answer: pressure

*Question*
Q: What kind of bonds, where electrons are transferred rather than shared, are considered the ultimate in polarity? Choices: - covalent bonds - soluble bonds - magnetic bonds - ionic bonds A:
**Answer**
ionic bonds

Q: Q: The plasma membrane of a skeletal muscle fiber is called the what? Choices: - sheath - annulata - soleus - sarcolemma A:
A: sarcolemma