Answer:
c. In mines or confined places, where oxygen levels have been depleted, ventilation may occur.
Explanation:
Environments classified as “confined space” are hazardous for several reasons, but one of the main ones is the low oxygen concentration. Normally atmospheric air contains a 21% concentration of oxygen that is necessary for the maintenance of human life. Some confined spaces have this concentration of less than 21% oxygen, which can be very harmful to human life and lead to death.
Low oxygen concentration can be masked by ventilation in confined places. This is because in confined places oxygen levels may be low, but ventilation may continue despite inadequate oxygenation.
Answer:
☆ Compare between the features of indigenous varieties and hybrid varieties.
➢ Native plants are local plant species or varieties that have been naturally growing in particular geographical region. ... Hybrids on the other hand are <u>superior varieties of same vegetable species artificially crossed & developed by humans.</u> One cannot harvest seeds from hybrids to grow next generation for re-sowing.
#CarryOnLearning
Answer:
Roots help a plant grow by absorbing the water and nutrients from the soil
Explanation:
This is indeed true. But it depends on if u get a mutation after u have a kid or before
if u have a kid before mutation ur kid will most likely get a mutation as well.
if u have a kid after mutation rest assure ur kid will be safe... unless its contagious