What are two reasons why the terrestrial planets formed closer to the sun after the supernova event that initiated the formation of the solar system? a.) they are made of denser objects, which can condense at relatively high temperatures. b.) they contain lightweight materials that condense in areas of relatively low radiation. c.) they are made of heavier elements, which have a stronger gravitational attraction to the sun. d.) they are relatively small in size, so the sun’s gravity has a strong influence on them. e.) they have gaseous surfaces, which is ideal in those areas of high radiation near the sun.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.

Fungi exist as single cells or as branching networks of multicellular filaments. how does the structure of filaments relate to their function