Science M.C.Q-[Bio-1M]

3. Both of these

Explanation:

Xylem consists of tracheids, vessels, xylem parenchyma and xylem fibres.

1. Collenchymas.

Explanation:

The cells of this tissue are living, elongated and tightly packed with no inter-cellular space.

3. Collagen.

Explanation:

White fibres of connective tissue are made up of collagen..

4. Skeletal muscles contract and pull the tendon to move.

Explanation:

Skeletal muscles are striped, voluntary muscles, due to presence of alternate dark and light bands. They are called voluntary as they work according to our will. While doing work and running skeletal muscles contract and pull the tendon (which connects muscles to bones) to move the bone.

4. Chondrocytes.

Explanation:

Mast cells are found in areolar tissue, basophils are found in blood and osteocytes are found in bone.

1. Epithelial.

Explanation:

Simple squamous epithelial cells are extremely thin and flat and form a delicate lining. Squamous epithelial tissue forms the inner lining of a blood vessel.

2. Epithelial

Explanation:

Glands develop from epithelial tissue. They may be unicellular or multicellular.

2. Collenchyma.

Explanation:

Collenchyma: It is a simple permanent living mechanical tissue.

• It is found in the hypodermal regions of dicot stem, leaf and fruit walls.
• Cell wall is unevenly thickened with cellulose and pectin.
• Provides mechanical support to growing parts of plants such as young stem, petiole of leaf.

4. All the above

Explanation:

Sclerenchyma is a type of simple permanent tissue. The cells of this tissue are dead. Tracheids and vessel are elongated, tubular cells of xylem (complex permanent tissue). These are non-living cells.

4. All the above

2. Sclerenchyma.

​​​​​​​Explanation:

Sclerenchyma is entirely composed of dead cells. Tissues mentioned in others options are composed of living cells only.

3. Xylem

Explanation:

Xylem consists of tracheids, vessels, xylem parenchyma and xylem fibres. The cells have thick walls, and many of them are dead cells.

2. Is made of cells that are capable of cell division.

Explanation:

Meristematic tissue consists of cells which are not differentiated and which are cabable of cell division. It is found on those regions of the plant which grows.

2. Cardiac and smooth

4. Erythrocytes

Explanation:

Erythrocytes are the RBCs. White blood cells are the cells that help the body fight infection.

There are a number of different types and sub-types of white blood cells which each have different roles to play.

The two major types of white blood cells are:

Granulocytes

Agranulocytes

1. Companion cells.

Explanation:

Epidermal tissue system is the outermost covering of plants. It consists of epidermis, stomata and epidermal outgrowths. Epidermis is generally composed of single layer of parenchymatous cells compactly arranged without intercellular spaces. But it is interrupted by stomata. In leaves some specialized cells which surround the stomata are called the guard cells. Chloroplasts are present only in the guard cells of the epidermis. Other epidermal cells usually do not have chloroplasts. The outer wall of epidermis is usually covered by cuticle.

Stoma is a minute pore surrounded by two guard cells. The stomata occur mainly in the epidermis of leaves. In some plants such as sugarcane, the guard cells are bounded by some special cells. They are distinct from other epidermal cells. These cells are called subsidiary or accessory cells. Trichomes and root hairs are some epidermal outgrowths. The unicellular or multicellular appendages that originate from the epidermal cells are called trichomes. Trichomes may be branched or unbranched. Rhizodermis has two types of epidermal cells - long cells and short cells. The short cells are called trichoblasts. Root hairs are produced from these trichoblasts.

3. Xylem

Explanation:

Parenchyma, collenchyma and sclerenchyma are types of simple tissue whereas xylem is a type of complex tissue.

4. Branched

3. Areolar.

Explanation:

Areolar tissue is a loose and cellular connective tissue. Its matrix consists of two kinds of fibres, i.e. The white collagen fibres (which changes into gelatin on boiling in water) and the yellow elastic fibres or elastin. Several other kinds of irregular cells, (e.g. fibroblasts), which can engulf bacteria and prevent infection (e.g. macrophages) are also present in the matrix.

1. Companion cells.

Explanation:

Companion cells are present along the sieve tube are connected to them via plasmodesmata. These cells are metabolically active and sieve tube elements are dependent on these cells they do not lose nucleus at maturity. RBC vessels and sieve tube cells lose their nucleus at maturity.

3. Xylem parenchyma

Explanation:

Xylum parenchyma cells are living. The parenchyma stores food and helps in the sideway conduction of water.

4. Phloem parenchyma.

Explanation:

The phloem parenchyma stores food material and other substances like resins, latex and mucilage. It is absent in monocot stem.

2. Smooth muscles.

Explanation:

Smooth muscles are found in the walls of hollow visceral organs. They do not work according to our will. They are involved in peristaltic movements of gastro intestinal tract and male genital tract. Cardiac muscles are present in the heart. They contract and relax rapidly, rhythmically and tirelessly. They help to pump the blood to various parts of the body. The working of both smooth and cardiac muscles is involuntary while skeletal or muscles move according to our will and are voluntary in action.

3. Conduction of water.

Explanation:

Conduction of water is a function of the xylem tissues and not of epidermis.

3. Conduction of water

2. Companion cells.

Explanation:

Tracheids and vessels are xylem elements and are concerned with the transport of water. They are long tube-like structures with partially or completely dissolved walls to form water pipes (in vessels) and pits in cell wall (in tracheids) for conducting water. Sieve tubes are slender tube-like structures with their end walls perforated by numerous pores and are called sieve plates. They are phloem elements and are main food conducting elements. Companion cells possess numerous mitochondria and ribosomes and are supporting units of sieve tube.

1. Platelets.

Explanation:

Platelets are not true cells in the blood.

3. All xylem cells are dead cells except xylem parenchyma.

Explanation:

Xylem parenchyma is the only living component of the xylem tissue whereas phloem sclerenchyma is the only dead component of phloem.

1. B-lymphocyte.

Explanation:

B-Lymphocytes and Monocytes are agranular WBCs or Leukocytes, while Basophil is a granular leukocyte or WBC. Platelets are enucleate plasma components that form clot during an wound or injury.

So, the correct answer is 'Platelet'

1. Pectin.

Explanation:

Walls of collenchymas are irregularly thickened due to the deposition of pectin.

2. Limbs.

Explanation:

Voluntary muscles are those muscles that our under our will i.e. those muscles that can be controlled. Limbs are made of voluntary muscles; their actions are under our control. Alimentary canal, iris of eye and bronchi of lungs are involuntary and they are regulated on their own in a specific pattern.

2. Limbs.

Explanation:

Movement of organs in other options is not controlled by individual volition. Hence, voluntary muscles are not found in them.

1. Ciliated epithelium.

Explanation:

In the respiratory tract, the columnar epithelial tissue also has cilia, which are hair-like projections on the outer surfaces of epithelial cells. These cilia can move, and their movement pushes the mucus forward to clear it. This type of epithelium is thus ciliated columnar epithelium.

2. Endodermis

Explanation:

Trabeculae refers to the projections from the cell wall that extends across the cavity of certain plants.

The endodermal cells elongate to form trabeculae and they help in connecting the two tissues.

3. Collenchyma

4. Collenchyma

Explanation:

Collenchyma is generally absent in monocot stems and leaves.

2. Similar cells having common origin and functions

Explanation:

Generally, some group of cells have same function and structure and also are derived from same origin.These group of cells are called tissue.

2. Stratified squamous epithelium.

Explanation:

Skin epithelial cells are arranged in many layers to prevent wear and tear. Since they are arranged in a pattern of layers, the epithelium is called stratified squamous epithelium.

3. Tracheids.

Explanation:

The gymnosperms are characterised by the presence of tracheids as their major conducting tissue. These are elongated dead cells with hard lignified walls. They conduct water and do not have open ends like the vessels.

3. Bichat

Explanation:

The term tissue was given by Bichat.

2. Actin and myosin.

Explanation:

My ofibril has striated appearance due to distribution pattern of two proteins- Actin and Myosin. 

My ofibril has alternate dark and light bands on it. The light band contains Actin and is called I band. The dark band called A band contains myosin.

3. Collenchyma

3. Glandular epithelium.

Explanation:

Multicellular exocrine glands: Structurally, multicellular exocrine glands are more complex than their unicellular neighbors. They have two main parts: an epithelium-derived duct and a secretory unit (made of secretory cells). In almost all cases, the secretory unit is surrounded by connective tissue.

2. Large

Explanation:

The meristematic cells are full of cytoplasm and have a big nucleus.

2. Cardiac muscle.

Explanation:

This is the reason our heart keeps on pumping the blood throughout the life. Other types of muscles work as and when required because they do not need to work continuously.

4. Parenchyma.

Explanation:

The parenchyma is present in soft parts of the plant such as cortex, pith, palisade and some parts of the flower. It is considered as a fundamental or ground tissue.

2. Calcium and phosphorus.

4. Procambium

2. Lignin

4. All of the above

Explanation:

Mast cells are scattered throughout the connective tissues of the body and they mediate inflammatory responses such as hypersensitivity and allergic reactions.

Mast cells secrete a number of different chemical mediators including heparin, histamine, serotonin, interleukins, proteoglycan (like heparin) and various enzymes in coarse granules found throughout the cytoplasm of cells.