PART - 2 - Unit V : CH - 16 Excretory Products and Their Elimination — BIOLOGY STD 11 Science — Question

Give diagrammatic representation of the meiotic cell division.

Photosynthesis not only facilitates production of food but also cleans up the environment. Which of the following is similar to this multipronged effect of photosynthesis? Explain how deforestation affects our environment.

1. An automobile not only carries people but also releases carbon dioxide in the air.
2. A cow not only gives milk but also produces methane which is a greenhouse gas.
3. A cow not only gives milk but also produces cowdung which can be used as kitchen fuel.

Write the features that distinguish between the two,
Plasma and Serum.

State economically important uses of:
heterotrophic bacteria

Name the following:

1. A poisonous mushroom having white spores.
2. Edible Basidiomycetes.
3. Fungus used in brewing industry.
4. It is searched by trained pets.
5. Root-like, cards-like hyphal masses having a distinct growing point.
6. Non-motile meiospores develop in Basidiomycetes.
7. Compact groups of hyphae produced to overcome unfavourable conditions.

Draw a diagram showing comparison of diploblastic and triploblastic organization.

What is the basic body plan of animals?

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?

What is the difference between lymph and blood?

What are the main differences among Chlorophyceae, Phaeophyceae and Rhodophyceae?