Question 21 1 pts
When a test tube of water containing an elodea (aquatic plant) is place near a white light, the
plant gives off gas bubbles. When elodea is placed near different color light, the rate of
bubbles is affected. The independent (manipulated) variable in this demonstration is the
o type of plant used
O color of light source
distance of plant from the light source
O temperature of the water in the test tube
1 pts
Question 22

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

Discuss the similarities and differences between whale flippers and tail flukes(*back fins, not the fish) and fish fins, using the scientific terms "homologous structures" and "analogous structures" in the discussion (5-7 sentences)

6. carly removed her watch and other jewelry, rolled up her sleeves, and properly washed her hands. which is the next step she should do to don her personal protective equipment? remove the mask by untying the lower string, then the top strings pick up the mask by the upper ties, trying not to touch the part that covers the face let the clean gown unfold by holding it directly in front of her pull the gown away from her shoulders, trying not to touch the inside of the gown