Tag: zoology

Questions Related to zoology

Government of India is putting more stress on planting quick growing trees which yield better fodder and fuel. It is under

  1. Afforestation

  2. Forest conservation

  3. Social forestry

  4. All of the above


Correct Option: C

Chipko movement in the year 1974 in Garhwal Himalayas involved

  1. Protecting tigers

  2. Preventing soil erosion by planting trees

  3. Preventing pollution by closing down industries

  4. Hugging trees to prevent the contractors from felling them


Correct Option: D
Explanation:

Chipko movement in the year 1974 in Garhwal Himalayas involved hugging trees to prevent the contractors from felling them. This movement was started in March 1974 in Gopeshwar in Chamoli District and was headed by Chandi Prasad Bhatt of Gopeshwar and Sunder Lal Bahuguna of silyara in Tehri region. It was started for protecting trees. Local women showed enormous bravery in protecting trees from the axe of contractors by hugging them. People all over the world have acclaimed the Chipko Movement.

Social forestry is

  1. Management and protection of forest

  2. Afforestation of barren and deforested lands 

  3. Done with the purpose of helping environmental, social and rural development

  4. All of the above


Correct Option: B
Explanation:

Social forestry refers to the management & production of forest and afforestation of lands which are barren or have undergone deforestation. This is done to improve the environmental conditions

So, the correct answer is 'Afforestation of barren and deforested lands'

Planting of trees on unused farm land, road and rail ride etc. is called as

  1. Social forestry

  2. General forestry

  3. Agro forestry

  4. Commercial forestry


Correct Option: A
Explanation:

The 'National Commission on Agriculture', Government of India, first used the term social forestry in 1976. It was then that India embarked upon a social forestry project with the aim of taking the pressure off the forests and making use of all unused and fallow land. Government forest areas that are close to human settlement and have been degraded over the years due to human activities needed to be afforested. Trees were to be planted in and around agricultural fields. Plantation of trees along railway lines and roadsides, and river and canal banks were carried out. They were planted in village common land, Government wasteland and panchayat land. 

Social forestry also aims at raising plantations by the common man so as to meet the growing demand for timber, fuel wood, fodder, etc., thereby reducing the pressure on the traditional forest area. This concept of village forests to meet the needs of the rural people is not new. It has existed through the centuries all over the country but it was now given a new character.

Fortilization in earthworm is

  1. Cross fertilization

  2. Mutual fertilization

  3. Self fertilization

  4. None of these


Correct Option: A
Explanation:

Earthworm is a bisexual or hermaphrodite but always shows cross-fertilization due to polyandrous conditions.

Number of ovaries present in earthworm is

  1. One

  2. Two

  3. Four

  4. Eight


Correct Option: B
Explanation:

The number of ovaries present in Earthworm is one pair of ovaries. One pair of ovaries is attached at the intersegmental septum of the 12th and 13th segments. Ovarian funnels are present beneath the ovaries which continue into the oviduct and open on the ventral side.

So the correct answer is "Two".

In earthworms, self fertilization does not occur due to 

  1. Protandry

  2. Protogyny

  3. Both A and B

  4. Dichogamy


Correct Option: A
Explanation:

Earthworms are monoecious or hermaphrodite (have both male and female sex organs) but are protandrous. The testes mature earlier than ovaries and hence, self-fertilisation is avoided.
Thus, the correct answer is option A.

Number of testes in Earthworm is

  1. One

  2. Two

  3. Four

  4. Eight


Correct Option: C
Explanation:

Earthworm is hermaphrodite. There are two pairs of testes present in the 10th and 11th segments. Their vasa deferentia run up to the 18th segment where they join the prostratic duct. The prostate and spermatic duct open to the exterior by a pair of male genital pores on the ventrolateral side of the 18th segment. 

So the correct answer is "Four".

The female genital aperture, in earthworm is present ventrally on the segment

  1. 10th

  2. 12th

  3. 14th

  4. 18th


Correct Option: C
Explanation:

Four pairs of spermathecae are located in 6th-9th segments. They receive and store spermatozoa during copulation. One pair of ovaries is attached at the inter-segmental septum of the 12th and 13th segments. Ovarian funnels are present beneath the ovaries which continue into the oviduct, join together and open on the ventral side as a single median female genital pore on the 14th segment.

So the correct answer is '14th'.