Anatomy question

compared to air in the alveoli, blood in the pulmonary artery contains which of the following?
these are the options:
higher concentrations of oxygen and lower concentrations of carbon dioxide
higher concentrations of oxygen and higher concentrations of carbon dioxide
lower concentrations of oxygen and lower concentrations of carbon dioxide
lower concentrations of oxygen and higher concentrations of carbon dioxide

80 pts the type of cloud shown here may produce heavy rainfall. this type of cloud most likely occurs in an area of the sub-saharan that is a) often dry. b) often wet. c) very windy. d) usually cool.

Tara sees a commercial for a brand of pills that promise to boost energy and people perform better in work and school. as people in the commercial talk about how much better they feel when taking the pill, tara notices a message on the bottom of the screen that reads, "this pill is not approved by doctors and has not been tested in controlled experiments." what is the best conclusion that tara should make about the commercial? it is making scientific claims based on subjective observations. it is making scientific claims based on opinions instead of pseudoscientific facts. it is making pseudoscientific claims based on objective observations. it is making pseudoscientific claims based on opinions instead of scientific facts.

What is one energy transformation that is taking place in the photo? radiant energy to thermal energy thermal energy to nuclear energy chemical energy to thermal energy radiant energy to chemical energy