The type of inflorescence characterized by having dimorphic flower is

1) Catkin

2) Umbel

3) Corymb

4) Capitulum

Correct Answer :4

SOLUTION
There are two types of inflorescence, racemose and cymose. Racemose inflorescence is further divided into elongated axis, shortened axis and flattened axis.
Catkin has elongated axis.
t is a modification of spike inflorescence. It bears unisexual flower. Umbel and corymb have shortened axis. In corymb, the lower flowers have long stalks as compared to upper flowers.
Umbel has group of flowers at the tip. Capitulum has flattened axis. In this, flower are sessile and are present on a flat surface. It is characterized by having dimorphic flower.

Mycocytes of sponges occur in or around

1) Spongocoel

2) Osculum

3) Germ cells

4) Trophocytes

Correct Answer :2

Solution

A. Spongocoel is the central body cavity of sponges.

B. Osculum is the exhalant pore through which water flows out of the body.

C. Germ cells are the cells that develop into gametes.

D. Trophocytes are the cells in which digestion of food takes place.

Myocytes are modified contractile amoebocytes arranged around osculum. They guard and regulate the osculum.

Hence, myocytes of sponges occur in or around osculum.

Where does Wuchereria bancrofti lodge and accmulate in the human body ?
1. Lung
2. Intestine
3. Lymphatic vessels
4. Liver

Correct Answer :3

Retia mirabilia specially in thoracic region are extensively developed in

1) Artiodactyla

2) Perrisodactyla

3) Cetacea

4) All of the above

Correct Answer :3

Solution

When the arteries and veins lying very close to each other forms a complex structure it is known as a rete mirabile, found in some vertebrates. The retia mirabilia of cetaceans in thoracic region are considered as one of the morphologic adaptations which modulate hemodynamics during diving and resurfacing.

Scorpions and spiders belong to
 1) Insecta 2) Crustacea 3) Myriapoda 4) Arachnida
 

Correct Answer :4

The type of Aestivation seen in the family Caesalpiniaceae is
 
 1) valvate
 2) vexillary
 3) twisted
 4) ascendingly imbricates

Correct Answer :4

The following ratio of hormonal concentration is required to induce callus to form shoot and root.
 1) Gibberellins à auxin
 2) Auxin à Cytokinin
 3) Gibberellins à Cytokinin
 4) Ethylene à auxins

Correct Answer :2

Which of the following observation about saliva is incorrect

(1)     Its enzyme ptylin is concerned in the digestion of disaccharides

(2)     By its solvent action on the food stuffs at anables testing to take place

(3)     It facilitates, speech moistens the food and lubricates the process of swallowing

(4)     It is secreted in response to the sight, taste and smell of food and also to the act of chewing

Correct Answer :1

 In aquatic ecosystems the region that is not affected by temperature is the
1. epilimnion
2. hypolimnion
3. metalimnion
4. all of these

Correct Answer :2

Heterothallism is found in :

1) Mucor

2) Cycas

3) Selaginella

4) Volvox

 

Correct Answer :1

Solution

Heterothallic fungi have sexes that reside in different individuals. The term is applied particularly to distinguish heterothallic fungi, which require two compatible partners to produce sexual spores. Mucor is a heterothallic fungi.