Q. No.
Totipotent cells present in the mesohyl of porifers are known as:
1. Lophocytes
2. Amoebocytes
3. Collencytes
4. Grey cells
Identify the incorrect comparison between a typical cartilaginous and a bony fish:
|
|
Characteristic |
Cartilaginous fish |
Bony fish |
|
1. |
Usual shape |
Dorso-ventrally flattened |
Bilaterally flattened |
|
2. |
Exoskeleton |
Separate dermal placoid scales |
Overlapping dermal cosmoid, ganoid, cycloid or ctenoid scales |
|
3. |
Intromittent organ |
Males use pelvic fins as claspers |
Do not use claspers |
|
4. |
Mouth |
Variable shape and size at the tip or terminal part of the head |
Large, crescent shaped on the ventral side of the head |
Match the types of reptilian skulls [COLUMN I] with their corresponding diagrams in COLUMN II and select the correct answer from the codes given:
|
|
COLUMN I |
|
COLUMN II |
|
A |
Anapsid |
P |
 |
|
B |
Synapsid |
Q |
 |
|
C |
Diapsid |
R |
 |
Codes
|
A |
B |
C |
|
|
1. |
P |
Q |
R |
|
2. |
R |
Q |
P |
|
3. |
P |
R |
Q |
|
4. |
R |
P |
Q |
The diagram shows the movement of air during inhalation in birds. The maximum percentage of the inhaled air will enter into:
1. Anterior air sacs
2. Lungs
3. Posterior air sacs
4. Parabronchi
Identify the incorrect comparison between a typical cartilaginous and a bony fish:
|
|
Characteristic |
Cartilaginous fish |
Bony fish |
|
1. |
Gill openings |
Not protected by an operculum |
Protected by an operculum |
|
2. |
Fertilization |
Internal |
Usually external |
|
3. |
Retina |
Lacks cones |
Has cones |
|
4. |
Conus arteriosus |
Absent |
Present |
Which of the following is not seen in a marsupial?
1. Mammary glands
2. Three middle ear bones
3. True hairs
4. Corpus callosum
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
As you can see from the given pie chart, over 70% of Mammalia species come from a single order. Which order of class mammalian is this?
| 1. | Rodentia | 2. | Chiroptera |
| 3. | Carnivora | 4. | Primata |
The tunic of urochordates is composed of proteins and complex carbohydrates, and includes tunicin, which is a variety of:
| 1. | cellulose | 2. | amylopectin |
| 3. | agaropectin | 4. | alginic acid |
© 2025 GoodEd Technologies Pvt. Ltd.