They key event in the transition of the amphibians from water to land is the
replacement of the gills with lungs
possession of webbed limbs
development of long hing limbs
possession of tympanic membrane
Correct answer is A
No explanation has been provided for this answer.
Rhizophus
Dryopteris
Brachymenium
Spirogyra
Correct answer is D
No explanation has been provided for this answer.
The division of a body into two equal halves along a longitudinal plane is called
bilateral symmetry
transverse section
radial symmetry
longitudinal section
Correct answer is A
No explanation has been provided for this answer.
Which of the following is an organ?
Guard cell
Liver
Xylem bundle
Blood
Correct answer is B
No explanation has been provided for this answer.
The structure that is most commonly identified in all living cells under the light microscope is the
mitochondrion
chloroplast
nucleus
ribosome
Correct answer is C
No explanation has been provided for this answer.