Animal Kingdom — BIOLOGY STD 11 Science — Question

How does Cycas resemble bryophytes and pteridophytes?

If a patient's ECG reveals an abnormally long delay between the P-wave and the QRS deflection, what does this suggest?

Gibberellins were first discovered in Japan when rice plants were suffering from bakane (the foolish seedling disease) caused by a fungus Gibberella fujikuroi.

1. Give two functions of this phytohormone.
2. Which property of Gibberellin caused foolish seedling disease in rice?

Answer the following:

1. Name the excretory organs of cockroach.
2. Where are these located?
3. What is their function?
4. Which other excretory organs also help in excretion?

During the group study at Vishalthi's home, Anil got a severe pain in his stomach. Vishakha called her mother immediately as she (mother) was a doctor.
After diagnosis, stone is found in her kidney. She gave him some medicines and also suggested to drink a lot of water, so that the stone related problem does not arise again.

1. What is the medical term used for the stone in kidney?
2. Way should we drink a lot of water on the regular basis?
3. Name the ions which are involved in the formation of renal stones?
4. What values did vishakha’s mother possess?

Museums and Zoological parks (Zoos) are both taxonomical aids; yet, how do they differ from each other?

Given below are the pairs of animals and the phylum to which they belong. Which out of these is not a matching pair and why?

1. Pila (Apple snail) - Mollusca
2. Anopheles (Mosquito) - Arthropoda
3. Pheretima (Earthworm) - Aschelminthes
4. Taenia (Tapeworm) - Platyhelminthes

How the study of anatomy is useful to us?

What are the terms given below are related to?
Also Explain the terms:

1. Coxa.
2. Trochanter.

What can we conclude from the statement that the action and absorption spectrum of photosynthesis overlap? At which wavelength do they show peaks?