The male reproductive organ of a flower is the
carpel
stamen
petal
sepal
Correct answer is B
No explanation has been provided for this answer.
The transfer of pollen grains from the anther to a sigma is
propagation
placentation
pollination
fertilization
Correct answer is C
No explanation has been provided for this answer.
The chitin in the exoskeleton of many arthropods is strengthened by
lipids
proteins
calcium compounds
organic salts
Correct answer is C
No explanation has been provided for this answer.
The main structure in vertebrates that supports and protects the body is the
skeleton
ligament
muscle
joint
Correct answer is A
No explanation has been provided for this answer.
Which of the following is the waste product of an insect?
Alkaloids
Uric acid
Sweat
Mucilage
Correct answer is B
No explanation has been provided for this answer.