Tag: biology

The flowers wherein both the sex-organs, that is, the stamen and the pistil are present is called the bisexual or the hermaphroditic flowers. Those flowers wherein, only one of the sex-organ is present and the other is rudimentary absent, are called uni-sexual flowers. These can be pistillate when only pistil is present and can be staminate when only stamen is present.

• Hibiscus, Rose, and Datura have bisexual flowers with both stamens and carpel.
• Papaya has unisexual flowers, male flowers, and female flowers are on separate plants.
• So, the correct answer is 'Papaya'.

Oil and fats can clog the drains reducing its effectiveness in filtering water. In open drains, they block the pores in the soil and thus hamper the filtration by soil. Hence, oil and fats should not be released into the drain.

So, the correct answer is 'Disposal of oil in open drain'.

• Sheela's teacher said in her classroom that we should not dispose of motor oils and medicines in the drain because Motor oil and medicine hamper(prevent) the degradation process.
• Chemicals present in motor oil and medicine kill the microbes that facilitate degradation process.so do not throw them down the drain.
• So, the correct answer is 'Motor oil and medicine hamper(prevent) the degradation process.'.

• The chemical present in paints, Solvents, Insecticides, motor oils, medicines may kill microbes that help purify water. So do not throw them down the drain.
• Hence Paints can kill water purifying microbes.
• So, the correct answer is 'Paints'.

• All the cooking oils should not be thrown in drains because it can harden and block the pipes. In an open drain, the fats clog the soil pores reducing its effectiveness in filtering water. 
• Throw oil and fats in the dustbin.
• Hence Cooking oil should not be thrown down the drain because they block the drainage pipes.
• So, the correct answer is 'They block the drainage pipes'.