which of these diseases cannot be controlled by killing the vector?
River blindness
Malaria
Polio
Cholera
Bilharzia (shistosoma)
Correct answer is C
No explanation has been provided for this answer.
When the ciliary muscles of the eye contract, the eye lens
Bulge
Contracts
Rotates
Flattens
Is rounded
Correct answer is E
No explanation has been provided for this answer.
Which of the following is not an excretory organ in animals?
Lungs
Kidney
Leaf
Large intestine
Skin
Correct answer is C
Organs of excretion make up the excretory system. They include the kidneys, large intestine, liver, skin, and lungs. The kidneys filter blood and form urine. They are part of the urinary system, which also includes the ureters, bladder, and urethra.
Which of these statement below is not a characteristic of wind pollinated flower?
Stigmas are usually large and feathery
Nectar is usually absent
The pollen grains have rough spiny surfaces
The flowers are not scented
The pollen is light and smooth
Correct answer is C
No explanation has been provided for this answer.
The region of cell division in a root is
Root cap
Endodermis
Xylem
Piliferous layer
Meristem
Correct answer is E
No explanation has been provided for this answer.