2:1
1:2
1:1
1:3
3:1
Correct answer is C
No explanation has been provided for this answer.
One of the following statement is not true of viruses
They are micro-organisms
They are smaller than bacteria
They can be seen with an ordinary light microscope
They cause tobacco disease
They cause polio and smallpox
Correct answer is C
No explanation has been provided for this answer.
Denitrifying bacteria
Nitrifying bacteria
Nitrogen fixing bacteria
Nitrogen freeing bacteria
Nitrogen putrefying bacteria
Correct answer is C
No explanation has been provided for this answer.
Which one of the following is not an excretory product?
Urine
Sweat
Faeces
Salts
Carbon-dioxide
Correct answer is C
The major excretory products are carbon dioxide, excess water, and nitrogenous compounds like ammonia, urea, uric acid.
It is simply a matter of definition. Because feces are basically the remnants, remains, leftovers of food ingested but not digested (hence the remains,) its removal is named egestion.
In which of the following tissue do the cells have the ability to divide?
Meristem
Sclerenchyma
Phloem
Collenchyma
Pith
Correct answer is A
No explanation has been provided for this answer.