3 Four test-tubes are set up as shown in the diagram and left in full sunlight.
After several hours, which test-tube contains the most dissolved oxygen? (5)
(1 Point)
A
B
С
D
pond
weed
pond
weed
water
water
water
water
Snail
snail

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

Name the part of the the brain labeled "e".