Important Questions for Class 11 Biology 7th Chapter Structural Organization in Animals MCQ, Very Short, Short Type, Long Type
CBSE Class 11 Important Questions for Class 11 Biology Chapter 7 Structural Organization in Animals all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 11 Biology Chapter 7.
- MCQs
(1) Assertion: All cells in epithelium are held together with little intercellular material.
Reason: In nearly all animal tissues, specialized junctions provide both structural and functional links between its individual cells.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
(2) Assertion: The development of Americana is paurometabolous.
Reason: The nymph grows bymoulting about 13 times to reach the adult form.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
(3) Assertion: All connective tissues, the cells secrete fibers ofstructural proteins called collagen or elastin.
Reason: The fibers provide mechanical support to the cells in body.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
(4) Tendons is an example of
(a) dense regular connective tissues
(b) dense irregular connective tissues
(c) Adipose connective tissue
(d) Areolar connective tissue
(5) Setae in earthworm have a role in
(a) Respiration
(b) Locomotion
(c) Digestion
Circulation
(6) Frogs have _____ excretory system.
(a) Ureotelic
(b) Ammoniotelic
(c) Guanotelic
(d) Uricotelic
(7) Blood is example of
(a) Epithelial tissue
(b) Connective tissue
(c) Muscle tissue
(d) Nervous tissue
(8) Cardiac muscles are
(a) Involuntary
(b) Branched
(c) Straited
(d) All the above
(9) Assertion: The prostomiumis sensory in function in earthworms.
Reason: The first body segment is called the peristomium.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
(10) Adipose tissue is involved in______________
(a) Storage of fat
(b) Support framework
(c) Lining the intestine
(d) All the above
- Answer in one sentence
Q.1) Define: Tissues
Ans. Tissue is collection of identical cells, as well as intercellular chemicals, perform a specialized function in multicellular organisms.
Q.2) State the four basic types of tissues found in animals?
Ans. The structure of cells is different depending on their function. As a result, the tissues are diverse and can be divided into four groups of cells: Epithelial, Connective, Muscular, and Neural.
Q.3) What is the use of typhlosole in earthworms?
Ans. Except for the last 23rd-25th segments, the existence of an internal median fold of the dorsal wall called typhlosole is a distinguishing feature of the intestine after the 26th segment. This expands the absorption surface area in the gut.
Q.4) What is mimicry?
Ans. The frogs’ color changes when they are in grasses and on dry land. They have the power to change color in order to conceal themselves from their foes (camouflage). The term for this protective coloring is mimicry.
Q.5) What is hibernation and aestivation?
Ans. F take refuge in underground tunnels during summer or winter time to avoid the excessive heat and cold. Summer sleep (aestivation) and winter sleep(hibernation) are two different types of sleep seen in frogs.
Q.6) Is Sexual dimorphism seen in frogs?
ans. Sexual dimorphism is seen in frogs. the presence of sound-producing vocal sacs and a copulatory pad on the first digit of the forelimbs distinguishes male frogs from female frogs.
Q.7) What is the difference between morphology and anatomy?
Ans. The study of form or externally observable traits is referred to as morphology. The term morphology only refers to this in the case of plants or microorganisms. This refers to the exterior appearance of organs or sections of the body in animals. The term anatomy is commonly used to refer to the study of the morphology of internal organs in animals.
Q.8) What are spiracles in cockroach?
Ans. The respiratory system is made up of a network of trachea that open through ten pairs of small pores on the lateral side of the body called spiracles.
- Answer in short
Q.1) Explain the types of junctions in Epithelial cells?
Ans. 1.) In the epithelium and other tissues, there are three types of cell junctions.
2.) Tight, adherent, and gap junctions are the three types of junctions.
3.) Tight junctions aid in the prevention of chemicals seeping through a tissue.
4.) Adhering junctions bind neighboring cells together by cementing them together.
5.) Gap junctions allow cells to communicate by connecting the cytoplasm of neighboring cells, allowing for the rapid transport of ions, small molecules, and occasionally large molecules.
Q.2) What is nephridia? State the three types of nephridia.
Ans. 1.) Nephridia are segmentally arranged coiled tubules that make up the excretory organs.
2.) There are three types of nephridia:
(i) septal nephridia, which are present on both sides of intersegmental septa from segment 15 to the last that open into the intestine,
(ii) integumentary nephridia, which are attached to the lining of the body wall from segment 3 to the last that open on the body surface, and
(iii) In the 4th, 5th, and 6th segments, there are three paired tufts of pharyngeal nephridia.
Q.3) Earthworms are known as ‘friends of farmers. Justify
Ans. 1.) Earthworms are known as “farmer’s friends” because they dig burrows in the soil and make it porous, allowing for better respiration and penetration of developing plant roots.
2.) Vermicomposting is the process of earthworms enhancing the fertility of soil.
3.) In game fishing, they’re also utilized as bait.
Q.4) State the functions of simple and compound epithelium.
Ans. 1.) Simple epithelium and compound epithelium are two forms of epithelial tissues.
2.) A single layer of cells makes up simple epithelium, which serves as a lining for bodily cavities, ducts, and tubes.
3.) The compound epithelium, like our skin, is made up of two or more cell layers and serves a protective role.
Q.5) Describe nocturnal and compound vision in cockroaches.
Ans. 1.) Around 2000 hexagonal ommatidia make up each eye.
2.) A cockroach can obtain several photos of an object by using many ommatidia.
3.) This type of vision is known as mosaic vision.
4.) It has a higher sensitivity but lower resolution, and it is more frequent at night, hence the name nocturnal vision.
- Answer in brief
Q.1) Name the different types of connective tissue. Explain any one in detail.
Ans. 1.) The three types of connective tissue are (I) loose connective tissue, (ii) dense connective tissue, and (iii) specialized connective tissue.
2.) Areolar tissue beneath the skin, for example, is loose connective tissue with cells and fibres loosely distributed in a semi-fluid ground substance.
3.) It frequently acts as a support structure for epithelium.
4.) Fibroblasts (cells that generate and secrete fibers), macrophages, and mast cells are all present.
5.) Another form of loose connective tissue found primarily beneath the skin is adipose tissue.
6.) This tissue’s cells are specialized for fat storage.
7.) Excess nutrients are converted to fats and stored in this tissue if they are not used right away.
Q.2) Describe the circulatory system in a cockroach.
Ans. 1.) Cockroaches have an open blood circulatory system.
2.) The blood vessels are underdeveloped and open into the air (haemocoel).
3.) The blood bathes the visceral organs in the haemocoel (hemolymph).
4.) Colorless plasma and hemocyte’s make up the hemolymph.
5.) The cockroach’s heart is an extended muscular tube that runs along the mid-dorsal line of the thorax and abdomen.
6.) It is divided into funnel-shaped chambers on both sides by ostia.
7.) Through the ostia, blood from the sinuses enters the heart and is pumped anteriorly to the sinuses.
Q.3) Describe respiration in frogs?
Ans. 1.) Frogs have two separate strategies to breathe on land and in water.
2.) Skin serves as an aquatic respiratory organ in water (cutaneous respiration).
3.) Diffusion exchanges dissolved oxygen in the water through the skin.
4.) The buccal cavity, skin, and lungs serve as respiratory organs on land.
5.) Pulmonary respiration is the process of breathing through the lungs.
6.) The lungs are a pair of elongated, pink-colored sac-like organs located near the top of the trunk (thorax).
7.) Air enters the lungs via the nose, buccal cavity, and lungs.
8.) Gaseous exchange occurs through the skin during aestivation and hibernation.