Which of the following vertebrates has the simplest&...
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.
Which of the following causes pollution? ...
The type of protective adaption exhibited by the animal is ...
Both recesssive and dominant characters are found ...
Transportation in the xylem is represented by ...
The possession of breathing roots is a characteristic of plants growing in ...
The offspring produced when pure strains interbreed is described as ...
Carbon dioxide enters the leaf through the structure labelled ...