Morphology of Flowering Plants — BIOLOGY STD 11 Science — Question

Describe the role played by diaphragm and intercostal muscles in inspiration.

Can there be DNA replication without cell division?

The transpiration driven ascent of xylem sap depends on certain physical properties of water. Describe three such properties of water.

Carnivorous plants exhibit nutritional adaptation. Citing an example explain this fact.

Write the precise function of: Interfascicular cambium.

Inflammatory responses can be controlled by a certain steroid. Name the steroid, its source and also its other important functions.

Describe the three common steps in the sexual reproduction of fungi.

Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain.

On world AiDs day Ankit and his friends arranged an awareness compaign programme in their locality. Some elderly people rebuked the children and asked them not to talk of such things in public. The children convinced the elders about the need ror the programme and on understanding their point of view, they also joined the campaign.

1. What is AIDS?
2. Name the causal agent of AIDS.
3. What type of genetic material is found in AIDS virus?
4. What values did Ankit and his friends show on the occasion.

Abhay, a police officer, discovered a human pelvis from the jungle. After checking the reports of missing people, he found that a couple had been missing from that area since a month. Abhay was confused as to whom the pelvis belonged to and therefore, took it to the forensic investigator. The forensic expert reported it to be a female pelvis. Afterwards, the DNA from the missing female's mother and pelvis was matched. Since, both the DNA matched. It confirmed that out of the couple, the lady had died.

1. How did the investigator opened it to be a female pelvis?
2. What other bones of human can be used for sex identification?
3. Give a possible reason for the change in female pelvis.
4. What values are shown by Abhay?