Biology Past Questions and Answers

The tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had not only one small hole to allow light through. After twenty-four hours it was observed that

Which of the following groups of factors is completely abiotic?

If a handful of soil is shaken with water and left to settle, the soil particles will settle from light to heavy particles as follows

The initial volume of water poured into 60g bag of dry soil was 50ml and the amount that drained through was 35ml. The percentage water content of the fully soaked soil is therefore

Which of the following has the greatest influence on the distribution of animals in marine and fresh water habitats?