*Question*
Q: Within the first 8 weeks of gestation, a developing embryo establishes the rudimentary structures of all of its organs and tissues from the ectoderm, mesoderm, and endoderm. this process is called what? Choices: - abiogenesis - biosynthesis - parthenogenesis - organogenesis A:
**Answer**
organogenesis

*Question*
Q: The end of a pine tree branch bears the male cones that produce what? Choices: - the ovaries - oxygen - the stigmas - the pollen A:
**Answer**
the pollen

*Question*
Q: Lattice energy cannot be measured directly. what is its calculation based on? Choices: - chemical reactions - change in temperature - microscopic inspection - measured energy changes A:
**Answer**
measured energy changes

*Question*
Q: Catabolic reactions break down large organic molecules into smaller molecules, releasing the energy contained in what? Choices: - molecular bonds - liquid bonds - crystals bonds - chemical bonds A:
**Answer**
chemical bonds