Bronchi branch continually into smaller and smaller tubes and eventually end in sacs called
a. trachea
b. motor neurons
c. oblongata
d. alveoli

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.

Which of the following are responsible for sending messages from the hypothalamus to the thalamus?