Which of the following is true concerning the role of redox reactions in photosynthesis and cellular respiration? a. photosynthesis involves only reductions while respiration involves only oxidations

b. photosynthesis involves only oxidations while respiration involves only reductions

c. in photosynthesis, carbon dioxide is oxidized to form sugar while in respiration sugar is reduced to form carbon dioxide

d. in photosynthesis, carbon dioxide is reduced to form sugar while in respiration sugar is oxidized to form carbon dioxide

e. none of the choices are true

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3

Which of the following initial observations would more directly lead to this research study? a) ginko biloba is cost effective and also possesses heart-protective, antioxidant, anti-inflammatory properties. b) metformin is an effective treatment of patients with t2d, but shows side effects that complicate the disease state. c) over the past several years, the cost of treating t2d within the united states has increased dramatically. d) many plants contain molecules that improve the health and quality of life of patients with a variety of diseases like t2d. e) t2d affects millions of individuals in the usa and worldwide many of who could benefit from improved therapies.

Spirochetes have a twisting and flexing locomotion due to appendages called