Structural Organisation in Animals Test

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Structural Organisation in Animals Test - 63

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Weekly Quiz Competition

Question 1
1 / -0

In insecta heart is ____ and circulatory system is ____

A
Ventral, closed

B
Ventral, open

C
Dorsal, open

D
Dorsal, closed

Solution

Insects have an open and dorsal circulatory system as opposed to our closed circulatory system.
So, the correct option is 'Dorsal, open'.
Question 2
1 / -0

Compound eyes of cockroach produce vision known as

A
mosaic

B
monocular

C
binocular

D
ultrasonic

Solution

The cockroach has compound eyes made of several smaller units called ommatidia. Each of these units forms an image of the object and therefore several images are formed at a time creating a mosaic vision.
So, the correct option is 'mosaic'.
Question 3
1 / -0

How many segments are present in the abdominal regions of cockroaches?

A
$$10$$

B
$$8$$

C
$$15$$

D
$$20$$

Solution

The correct answer is A.
Cockroach are brown or black bodied animals that are include in class Insecta of Phylum Arthropoda. The body of an cockroach is segmented and divisible into three distinct region - head, thorax and abdomen. The abdomen in both males and females consists of 10 segments.
Question 4
1 / -0

Mandibles of cockroach are

A
Short with grinding teeth

B
Long and pointed

C
Short without teeth

D
Long and coiled
Solution
- In cockroach, mandibles are a pair of short, triangular, hard, unjointed,chitinised structures present on either side of the mouth.
- The inner margins of mandibles have teeth like structures. Each mandible has two types of teeth. They are incising teeth and grinding teeth. These teeth help to masticate food.
- Hence Mandibles of cockroach are short with grinding teeth.
- So, the correct answer is 'Short with grinding teeth'.
Question 5
1 / -0

Which of the following is mismatched in terms of its functions?

A
Nervous tissue - Conduction and reflexes.

B
Connective tissue - Binding and support

C
Muscular tissue - Contraction and conduction

D
Epithelial tissue - Protection and absorption

Solution

Muscular tissue has different functions such as maintaining the posture of the body, support the skeleton framework, but not conduction.
Conduction is mainly done by the nervous tissue. Nerve impulses are conducted from one part of the body to the other.
So, the correct answer is option C.
Question 6
1 / -0

Choose the correct answer from the alternatives given.
The yellowing of leaves, called chlorosis, is usually caused by the deficiency of:

A
sodium

B
phosphorus

C
magnesium

D
calcium

Solution

A magnesium-deficient crop will tend to have a pale overall colour. The earliest specific symptom of magnesium deficiency is interveinal chlorosis of older leaves. Chlorosis generally progresses to yellowing and necrosis of the oldest leaves. Therefore, without sufficient amounts of magnesium, plants begin to degrade the chlorophyll in the old leaves. This causes the main symptom of magnesium deficiency, interveinal chlorosis, or yellowing between leaf veins, which stay green, giving the leaves a marbled appearance.
So, the correct option is, 'Magnesium'.
Question 7
1 / -0

The involuntary muscles that cause the wave like contractions pushing food along the intestine are:

A
striated muscles

B
skeletal muscles

C
smooth muscles

D
intercalated muscles

Solution

Smooth muscle is an involuntary muscle present in stomach, intestine & bladder.
So, the correct option is 'smooth muscles'.
Question 8
1 / -0

Cardiac muscle is:

A
involuntary

B
smooth

C
striated

D
both (a) and (c)

Solution

Cardiac muscle or myocardium constitute the main tissue of the walls of the heart ; it is an involuntary, striated muscle.
So, the correct option is 'both (a) and (c)'.
Question 9
1 / -0

The ends of the two bones are connected by

A
Muscles

B
Tendons

C
Cartilages

D
Ligaments

Solution

The ends of the two bones are connected by ligaments. The ends of the bone and muscle are connected by tendons.
Hence, option d is correct.
Question 10
1 / -0

Which of the following is true about cardiac muscle cells?

A
They lack an orderly arrangement of actin and myosin filaments

B
They have less extensive sarcoplasmic reticulum and thus contract more slowly than smooth muscle.

C
They are connected by intercalated discs, through which action potentials spread to all cells in the heart.

D
They have a relatively low sodium permeability with resting potentials more positive than an action potential threshold
Solution
- Each cardiac muscle has a single centrally located nucleus.
- Cardiac muscle cells are striated due to a similar arrangement of contractile proteins.
- They mainly function in the pumping of oxygen-rich blood throughout the body to provide cells with vital nutrients.

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Re-Attempt Weekly Quiz Competition

Structural Organisation in Animals Test - 63

Result

Structural Organisation in Animals Test - 63

Score

-

Rank

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SHARING IS CARING

Question 1

Ventral, closed

Ventral, open

Dorsal, open

Dorsal, closed

Solution

Question 2

mosaic

monocular

binocular

ultrasonic

Solution

Question 3

$$10$$

$$8$$

$$15$$

$$20$$

Solution

Question 4

Short with grinding teeth

Long and pointed

Short without teeth

Long and coiled

Solution

Question 5

Nervous tissue - Conduction and reflexes.

Connective tissue - Binding and support

Muscular tissue - Contraction and conduction

Epithelial tissue - Protection and absorption

Solution

Question 6

sodium

phosphorus

magnesium

calcium

Solution

Question 7

striated muscles

skeletal muscles

smooth muscles

intercalated muscles

Solution

Question 8

involuntary

smooth

striated

both (a) and (c)

Solution

Question 9

Muscles

Tendons

Cartilages

Ligaments

Solution

Question 10

They lack an orderly arrangement of actin and myosin filaments

They have less extensive sarcoplasmic reticulum and thus contract more slowly than smooth muscle.

They are connected by intercalated discs, through which action potentials spread to all cells in the heart.

They have a relatively low sodium permeability with resting potentials more positive than an action potential threshold

Solution

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