Which of the following statement(s) is/are correct about nervous system of cockroach ?
- It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
- There are six ganglia lie in the thorax, and three in the abdomen.
- The sense organs are antennae, eyes, maxillary pulps, labial pulps and anal cerci etc.
- Each eye consists of about 5000 hexagonal ommatidia.
Both (i) and (iii)
Only (ii)
Both (i) and (iv)
All of these
Correct Answer :
C. Both (i) and (iv)
There are three ganglia lie in the thorax, and six in the abdomen. Each eye consists of about 2000 hexagonal ommatidia.
Related Questions
What external changes are visible after the last moult of a cockroach nymph?
Development of anal cerci.
Development of both forewings and hind wings.
Development labium.
Mandibles become harder.
Which of the follwing statement(s) is/are correct ?
- Cockroaches are brown or black bodied animals that are included in class insecta of phylum arthropoda.
- Males bear a pair of short, thread like anal styles which are absent in females.
- Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen.
- The nymph grows by moulting about 13 times to reach the adult form.
Only (i)
Both (ii) and (iii)
Both (i) and (ii)
All of the above
Match the terms given in column-I with their feature given in column-II and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Terms) | (Features) |
| A. Exocrine gland | I. They help to stop substances from leaking across a tissue |
| B. Endocrine gland | II. Hormones are secreted directly into the fluid bathing the gland |
| C. Tight junctions | III. They perform cementing to keep neighbouring cells together. |
| D. Adhering junctions | IV. Secretes mucus, saliva, earwax, oil, milk, digestive enzymes and other cell products |
A IV; B II; C I; D III
A II; B IV; C I; D III
A IV; B II; C III; D I
A IV; B I; C II; D III
Tendons and ligaments are the examples of
areolar connective tissue
adipose tissue
dense regular connective tissue
loose connective tissue
The only type of cell seen in a tendon is
muscle fibres
reticular cells
collagenous cells
fibroblasts
Cockroaches are brown or black bodied animals that are included in class _______ of phylum _______.
reptilia; annelida
insecta; arthropoda
insecta; annelida
reptilia; arthropoda
In cockroach, the testes are present in
3, 4, 5 abdominal segments
4, 5, 6 abdominal segments
5, 6, 7 abdominal segments
6, 7, 8 abdominal segments
Statement 1 : Intercalated discs are important regions of cardiac muscle cells.
Statement 2 : Intercalated discs function as boosters for muscle contraction waves.
Statement-1 and statement-2 are true and statement-2 is a correct explanation for statement-1.
Statement-1 and statement-2 are true and ttatement-2 is not a correct explanation for statement-1
Statement-1 is true, and statement-2 is False
Both the statements are false.
The shape of a persons ear is due to mainly to
dense regular connective tissue
dense irregular connective tissue
elastic cartilage
fibrocartilage
The diagram given below represents the reproductive organ of male cockroach. Choose the correct labelling of the part of marked as A, B, C and D.
A 8th sternum, B - Anal cercus, C - 10th tergum, D - Anal style
A - 10th tergum, B - Anal cercus, C - Anal style, D - 8th sternum
A - Anal style, B - Anal cercus, C - 10th tergum, D- 8th sternum
A - Anal cercus, B - 8th sternum, C - 10th tergum, D - Anal style.
The blood of cockroach contains no respiratory pigment. It means that
cockroach does not respire.
respiration is anaerobic.
oxygen goes directly into tissues by diffusion.
oxygen goes directly into tissues by intracellular capillary system.
Muscle tissue cells are contractile, which means they
are responsible for the production and secretion of enzymes.
are specialized in contraction and relaxation.
help in the movement of involuntary organs only.
all of the above
Smooth muscles are______.
voluntary, branched, uninucleate
voluntary, multinucleate, cylindrical
involuntary, cylindrical, multinucleate
involuntary, spindle shaped, uninucleated, tapering
Consider the following statements regarding cockroach and mark the correct option.
- Head is formed by the fusion of 6-segments.
- Mouth parts are biting and chewing type.
- Crop is the part of mid gut.
Only (ii) is correct
(ii) and (iii) are correct
(i) and (ii) are correct
Only (iii) is correct
Refer the given figure and identify the correct characteristic feature.
- It is a type of loose connective tissue.
- It contains fibroblast, macrophages, collagen fibres and mast cells.
- The cells of this tissue are specialized to store fats.
- The wall of internal organs such as the blood vessels, stomach and intestine contains this type of tissue.
(i) & (ii)
(i) & (iii)
(ii) & (iii)
(iii) & (iv)
The secretions of endocrine glands are released directly
into the skin surface
into the blood stream
into a gland duct
into the brain tissue
What will happen if ligaments are cut or broken?
No movements at joints.
Bones will become fixed.
Bones will become unfixed.
Bone will move freely at joints.
Three essential components of most neurons are
simple epithelium, extracellular matrix and nerves.
axon, dendrites and cell body.
nerve cells, synapse and neuroglia.
mylein sheeth, node of Ranvier and Schwann cells.
The fibres of which of the following muscles are fusiform and do not show striations
Skeletal muscles
Cardiac muscles
Both (a) and (b)
Smooth muscles
Which of the following statement is correct regarding Female reproductive system of earthworm ?
It consists of two large ovaries, lying laterally in the 6th 7th abdominal segments.
Each ovary is formed of a group of five ovarian tubules or ovarioles, containing a chain of developing ova.
A pair of spermatheca is present in the 5th segment which opens into the genital chamber.
None of the above
Read the following statements and answer the question.
- It is made of a single thin layer of flattened cells with irregular boundaries.
- They are found in the walls of blood vessels and air sacs of lungs.
- They are involved in functions like forming a diffusion boundary.
Which of the following characteristics of tissue is being described by the above statements ?
Squamous epithelium
Columnar epithelium
Ciliated epithelium
Compound epithelium
Match the types of connective tissue given in column-I with their examples given column-II and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Types of connective) | (Examples) |
| A. Loose connective | I. Tendons and ligaments tissue |
| B. Dense regular | II. Skin tissue |
| C. Dense irregular | III. Cartilage, bones, blood tissue |
| D. Specialized | IV. Fibroblasts, macrophages connective tissue and mast cells |
A I; B IV; C II; D III
A I; B IV; C III; D II
A IV; B I; C II; D III
A IV; B II; C I; D III
Neuroglia are
excitable cells of neural tissue.
supporting and non-excitable cells of neural tissue.
two to three times in volume of neural tissue.
protective and excitable cells of neural tissue.
Which statement regarding anal cerci and anal style in cockroach is correct?
Anal cerci are absent but anal styles are present in male.
Anal cerci are absent and anal styles are present in female.
Anal styles are absent and anal cerci are present in male.
Anal styles are absent and anal cerci are present in female.
Which of the following statement(s) is/are correct regarding respiratory system of cockroach ?
- It consists of a network of trachea, that open through 12 pairs of small holes called spiracles present on the lateral side of the body.
- Thin branching tubes carry oxygen from the air to all the parts.
- The opening of the spiracles is regulated by sphincters.
- Exchange of gases take place at the tracheoles by diffusion.
Only (i)
(i), (ii) and (iii)
(ii), (iii) and (iv)
All of these
Which of the following statement(s) is/are correct regarding compound epithelium ?
It is made of more than one layer of cells and thus has a limited role in secretion and absorption.
Their main function is to provide protection against chemical and mechanical stresses.
They cover the dry surface of the skin, moist surface of buccal cavity, pharynx, inner lining of ducts of salivary glands and pancreatic ducts.
All of the above
In all connective tissues, except which of the following, the cells secretes the fibres of collagen or elastin protein ?
Bone
Cartilage
Areolar connective tissue
Fluid connective tissue
Which of the following statement is/are correct regarding digestive system of cockroach ?
- Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
- Gizzard helps in grinding the food particles.
- A ring of 6-8 blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice.
- At the junction of midgut and hindgut is present another ring of 100-150 yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph.
Only (i)
Both (ii) and (iii)
Both (i) and (iv)
All of these
Read the following statements and answer the question.
- They have a hard and non-pliable ground substance rich in calcium salts and collagen fibres.
- They support and protect softer tissues and organs.
- Osteocytes are present in the spaces called lacunae.
- They also interact with skeletal muscles attached to them to bring about movements.
Which of the following type of tissue is being described by above statements ?
Cartilage
Bone
Blood
Neurons
Which of the following statement(s) regarding cell junctions is/are correct ?
Tight junctions help to stop substances from leaking across a tissue.
Adhering junctions perform cementing to keep neighbouring cells together.
Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.
All of the above