18. • Houston, Texas and San Diego, California, are both near a coast
• Houston experiences more humidity
• San Diego California has drier air than most of the United States
• San Diego and Houston are about the same distance from the equator
Why is Houston more humid than San Diego?

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

What is the next step in muscle contraction after the actin changes shape? (apex)