The sky appears blue because the earth’s atmosphere __________?
		A. Scatters blue light
B. Reflects blue light
C. Transmits blue light
D. Has actual blue cover
		A. Scatters blue light
B. Reflects blue light
C. Transmits blue light
D. Has actual blue cover
Which of the following is the largest planet?
A. Neptune
B. Jupiter
C. Saturn
D. Mars
		A. Troposphere
B. Stratosphere
C. Ozone layer
D. Ionosphere
The study Of GLANDS is called?
A. cardiology
B. None of these
C. Endocrinology
D. Entomology
Average salinity or ratio of salt as per kilogram of water of ocean is__________?
		A. 35 grams
B. 55 grams
C. 32 grams
D. 42 grams
Red blood corpuscles are formed in the____________?
		A. Liver
B. Bone marrow
C. Kidneys
D. Heart
Human blood is red because hemoglobin, which is carried in the blood and functions to transport oxygen, is iron-rich and red in color. Octopuses and horseshoe crabs have blue blood. This is because the protein transporting oxygen in their blood, hemocyanin, is actually blue.