_________ planets orbits around the sun in a clockwise direction?
A. Earth
B. Mercury
C. Jupiter
D. Venus
An example of an abiotic component __________?
A. Plants
B. Soil
C. Animals
D. Bacteria
There are _____ kinds of joints present in a human body?
Skin cancer known as Melanoma associated with ____________?
A. ozone accumulation
B. ozone depletion
C. acid rain
D. allergens
____________ is the outermost layer of skin.
A. endodermis
B. dermis
C. epidermis
D. hypodermis
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