Organ System Level of Organisation

Q. Which photosynthetic organism behaves like heterotroph in the absence of sunlight ?

1. Euglenoids
2. Ciliated protozoans
3. Sporozoans
4. Slime moulds

Q. Animals having well-marked digestive cavity are included under

1. enterozoa
2. parazoa
3. mesozoa
4. protozoa

Q. Provide appropriate technical terms in the space provided.

a. Blood-filled cavity in arthropods

b. Free-floating form of cnidaria

c. Stinging organ of jelly fishes

d. Lateral appendages in aquatic annelids

Q. Blood vessels like arteries, veins and capillaries are found in

1. open circulatory system
2. closed circulatory system
3. both a and c
4. none of the above

Q. Alimentary canal is absent in:

1. Taenia and Echinococcus
2. Ascaris and Fasciola
3. Taenia and Schistosoma
4. Tricuris and Fasciola

Q. Blood vessels like arteries, veins and capillaries are found in

1. open circulatory system
2. closed circulatory system
3. both a and c
4. none of the above

Q. Amoeba is a member of phylum

1. Protozoa
2. Annelida
3. Mollusca
4. Porifera

Q. A complete digestive system is where

1. all the digestive glands are present
2. both anus and mouth are present
3. digestion occurs in the cavity of the digestive tract
4. digestion occurs in the individual cells lining the digestive tract

Q. What is the role of radula in molluscs?

Q. Describe the structure of an artery and a vein. Explain how their structure helps in their functioning.

Q.

The type of blood vascular system, in which blood flows inside blood vessels is called _____.

1. Closed

2. Open

3. Integrated

4. Non-integrated

Q. Which of the labelled blood vessels A, B, C or D carries oxygenated blood?

1. A and B
2. B and C
3. B and D
4. A and D

Q. Name the following:
The kind of blood cells which can squeeze out through the walls of one category of blood vessels.

Q. A complete digestive system is where

1. all the digestive glands are present
2. both anus and mouth are present
3. digestion occurs in the cavity of the digestive tract
4. digestion occurs in the individual cells lining the digestive tract

Q. Blood vessels like arteries, veins and capillaries are found in

1. open circulatory system
2. closed circulatory system
3. both a and c
4. none of the above

Q. In Molluscs, the digestive tract is

1. Absent
2. Complete
3. Incomplete
4. None of the above

Q.

Circulatory system is made of

1. veins and arteries

2. lymph vessels and nodes

3. blood vessels, heart and blood

4. capillaries and veins

Q. Some protists possess structures for regulation of their water content. They are

1. Nuclei
2. Contractile vacuoles
3. Membranes
4. Chromatophores

Q. Assertion :Bacteria and Protista do not have circulatory system. Reason: These organisms live in moist and watery environment.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. Distinguish between the following on the basis of what is given in the brackets:

a) Artery and Vein (function)

Q. Animals having well-marked digestive cavity are included under

1. parazoa
2. enterozoa
3. mesozoa
4. protozoa

Q. Cestodes are distinguished from other flatworms by the absence of:

1. Nervous system
2. Digestive system
3. Excretory system
4. Reproductive system

Q.

Write the opposite of $326BC$

Q. Which of the following is different from others in the absence of muscular coat?

1. Veins
2. Arteries
3. Capillaries
4. Arterioles

Q.

The type of blood vascular system, in which blood flows inside blood vessels is called _____.

1. Closed

2. Open

3. Integrated

4. Non-integrated

Q. Choose the correct answers from the alternatives given.
Which of the following is a material from which cell walls or shells of various protists are composed?

1. Glycogen
2. Floridean starch
3. Alginic acid
4. Leucosin

Q. Why earth worms doesnt have a digestive tract

Q. Animals having well-marked digestive cavity are included under

1. parazoa
2. enterozoa
3. mesozoa
4. protozoa

Q.

The type of blood vascular system, in which blood flows inside blood vessels is called _____.

1. Closed

2. Open

3. Integrated

4. Non- Integrated

Q. Radula is found in which of the following species?

1. Chiton sp.
2. Pila sp.
3. Lamellidens sp.
4. Pinctada sp.