The causative agent of typhoid fever is
salmonella
entamoeba
escherichia
shigella
Correct answer is A
No explanation has been provided for this answer.
An organism that exhibits extracellular digestion is
spirogyra
paramecium
amoeba
rhizopus
Correct answer is D
No explanation has been provided for this answer.
viviparous reproduction
paired limbs
terrestrial mode of life
a heart
Correct answer is A
No explanation has been provided for this answer.
One primitive feature of the coelenterates is the possession of
a dorsal mouth
radial symmetry
bilateral symmetry
a false foot
Correct answer is B
No explanation has been provided for this answer.
Which of the following vertebrates has the simplest heart structure?
reptile
fish
mammal
amphibian
Correct answer is B
No explanation has been provided for this answer.