Q: Answer the following question given this paragraph:      Q: Hormones vary widely in molecular size and type as well as?   Choices:  - simple regulators  - strange regulators  - foreign regulators  - local regulators  A:
A: local regulators


Q: Answer the following question given this paragraph:   Plants can also reproduce sexually, but their reproductive organs are different from animals’ gonads. Plants that have flowers have their reproductive parts in the flower. The sperm is contained in the pollen, while the egg is contained in the ovary, deep within the flower. The sperm can reach the egg two different ways:.   Q: What reproductive part is stored in a plant's pollen?   Choices:  - the gamete  - the mimic  - the egg  - the sperm  A:
A: the sperm


Q: Answer the following question given this paragraph:   Mechanical advantage equals the distance of effort divided by the distance the object moves. It is also equal to the output force divided by the input force.   Q: What advantage equals the distance of effort divided by the distance the object moves and is also equal to the output force divided by the input force?   Choices:  - potential  - atomic  - constant  - mechanical  A:
A: mechanical


Q: Answer the following question given this paragraph:   A tight junction is a watertight seal between two adjacent animal cells (Figure 3.17b). Proteins hold the cells tightly against each other. This tight adhesion prevents materials from leaking between the cells. Tight junctions are typically found in the epithelial tissue that lines internal organs and cavities, and composes most of the skin. For example, the tight junctions of the epithelial cells lining the urinary bladder prevent urine from leaking into the extracellular space. Also found only in animal cells are desmosomes, which act like spot welds between adjacent epithelial cells (Figure 3.17c). They keep cells together in a sheet-like formation in organs and tissues that stretch, like the skin, heart, and muscles. Gap junctions in animal cells are like plasmodesmata in plant cells in that they are channels between adjacent cells that allow for the transport of ions, nutrients, and other substances that enable cells to communicate (Figure 3.17d). Structurally, however, gap junctions and plasmodesmata differ.   Q: What is the term for a watertight seal between two adjacent animal cells?   Choices:  - cell membrane  - cell wall  - placental barrier  - tight junction  A:

A: tight junction