A crucible of 5 gm weighed 10 gm after filling with 10
fresh soil. It is then heated in an oven at 100°C
was 8 gm. The percentage of water in the soil is
for 1 hour. After cooling in a desiccator, the weight
A. 80%
B. 60% C. 20% D. 40%.
​

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased