A group of rats placed in an air-tight box for some hours...
A group of rats placed in an air-tight box for some hours died because they
breathed in air containing nitrogen
produced carbon dioxide
ran short of energy
used up the available oxygen
Correct answer is D
No explanation has been provided for this answer.
The stem of a typical aqautic plant usually has many ...
Water oozing out of plant leaves in a humid environment is a phenomenon known as ...
Which of the following features is not a characteristic of arteries? Arteries ...
The part labelled IV in the diagram is the ...
In the diagram, the organ through which the embryo receives food, water, and oxygen is labelled ...
The two halves of the pelvic girdle are joined together at the? ...
A dehiscent fruit formed from several fused carpels with many seeds is classified as ...
Which of the following statements best describes protein synthesis? ...
In the diagram, the likely pollinating agent of the flower is? ...