Cellular and tissue structure of a dicotyledonous leaf? -Biology

Cellular and tissue structure of a dicotyledonous leaf? -Biology
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Cellular and tissue structure of a dicotyledonous leaf? -Biology

Description : Cellular and tissue structure of a dicotyledonous leaf? -Biology

Last Answer : answer:

The transverse section of a plant shows following anatomical features : (i) Large number of scattered vascular bundles surrounded by bundle sheath (ii) Large conspicuous parenchymatous ground tissue (iii)vascular bundles conjoint and closed (iv) phloem parenchyma absent Identify the category of plant and its part. (a) Monocotyledonous stem (b) Monocotyledonous root (c) Dicotyledonous stem (d) Dicotyledonous root

Description : The transverse section of a plant shows following anatomical features : (i) Large number of scattered vascular bundles surrounded by bundle sheath (ii) Large conspicuous parenchymatous ground ... (a) Monocotyledonous stem (b) Monocotyledonous root (c) Dicotyledonous stem (d) Dicotyledonous root

Last Answer : (a) Monocotyledonous stem

Is it true the protective tissue on a leaf has a structure that keeps the moisture in the leaf from dying out?

Description : Is it true the protective tissue on a leaf has a structure that keeps the moisture in the leaf from dying out?

Last Answer : Need answer

Dicotyledonous plants examples. -Biology

Description : Dicotyledonous plants examples. -Biology

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What is a dicotyledonous root? -Biology

Description : What is a dicotyledonous root? -Biology

Last Answer : answer:

Differences between monocotyledonous and dicotyledonous plants. -Biology

Description : Differences between monocotyledonous and dicotyledonous plants. -Biology

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Dicotyledonous plants characteristics -Biology

Description : Dicotyledonous plants characteristics -Biology

Last Answer : answer:

What are the identifying features of the roots of dicotyledonous plants ?

Description : What are the identifying features of the roots of dicotyledonous plants ?

Last Answer : 1. There is no cuticle in the epithelium. 2. Mulram is unicellular. 3. The endothelium is made up of a series of cells. 4. The subcutaneous cortex is missing. 5. Circles consist of a series of parenchyma ... usually 2 to 6 in number. . Xylem is external. . The marrow is short and obscure or absent.

name the meristems which appear later in life of dicotyledonous and gymnosperms plants and causes increase in the girth of the organ in which they are

Description : name the meristems which appear later in life of dicotyledonous and gymnosperms plants and causes increase in the girth of the organ in which they are

Last Answer : name the meristems which appear later in life of dicotyledonous and gymnosperms plants and causes increase ... of the organ in which they are active.

What are the supporting tissues of woody dicotyledonous stem?

Description : What are the supporting tissues of woody dicotyledonous stem? 

Last Answer : Supporting tissues of woody dicotyledonous stem are: i) Wood ii) Bark. They are produced from the activity of two types of meristematic tissues called vascular cambium and cork cambium. As a ... iii) Expansion of vascular tissues stretches and breaks the epidermis and cortex, which are lost. 

What are the supporting tissues of young dicotyledonous stem?

Description : What are the supporting tissues of young dicotyledonous stem?

Last Answer : Young dicotyledonous stem depends for its rigidity or support on the: i) Osmotic Pressure and turgidity of parenchymatous tissues ii) The cylindrical distribution of its vascular bundles iii) Thick walled collenchymatous (living) and sclerenchymatous (dead) tissues. 

Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem? (a) Interfascicular cambium (b) Intercalary meristem (c) Phellogen (d) Intrafascicular cambium

Description : Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem? (a) Interfascicular cambium (b) Intercalary meristem (c) Phellogen (d) Intrafascicular cambium

Last Answer : (d) Intrafascicular cambium

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues? (a) All parts (b) Stem and root (c) Flowers, fruits and leaves (d) Shoot tips and root tips

Description : In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues? (a) All parts (b) Stem and root (c) Flowers, fruits and leaves (d) Shoot tips and root tips

Last Answer : (d) Shoot tips and root tips

Which of the following is not a Dicotyledonous fruit? a. Papaya b. Mango c. Pineapple d. Apple

Description : Which of the following is not a Dicotyledonous fruit? a. Papaya b. Mango c. Pineapple d. Apple

Last Answer : c. Pineapple

Which of the following is dicotyledonous albuminous seed — a. Soybean b. Cotton c. Sweet pea d. Castor

Description : Which of the following is dicotyledonous albuminous seed — a. Soybean b. Cotton c. Sweet pea d. Castor

Last Answer : d. Castor

Non-cellular layer that connects epithelium to connective tissue is

Description : Non-cellular layer that connects epithelium to connective tissue is

Last Answer : Non-cellular layer that connects epithelium to connective tissue is A. Basement membrane B. Epidermis C. Dermis D. Cell junction

The process through which the amount of DNA, RNA and protein can be known at a time is called (a) Autoradiography (b) Tissue culture (c) Cellular fractioning (d) Phase contrast microscopy

Description : The process through which the amount of DNA, RNA and protein can be known at a time is called (a) Autoradiography (b) Tissue culture (c) Cellular fractioning (d) Phase contrast microscopy

Last Answer : Ans. ((c))

The following statement(s) is/are true concerning cellular defense mechanisms. a. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen b. Macrophages may become activated and secrete cytokines c. Macrophages serve as phagocytic cells in the tissues but not within the bloodstream d. Polymorphonucleocytes (PMNS) are normally present in only small numbers within the tissue and enter an area of infection through diapedesis

Description : The following statement(s) is/are true concerning cellular defense mechanisms. a. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen b. Macrophages ... in only small numbers within the tissue and enter an area of infection through diapedesis

Last Answer : Answer: b, d A wide variety of cell types serve to provide host defense at several levels. Macrophages act as the initial antigen processing cell that serves to ... through diapedesis after chemotactic stimuli are excluded by macrophages, bacterial breakdown products, and complement activation

How is extracellular digestion related to cellular and tissue specialization?

Description : How is extracellular digestion related to cellular and tissue specialization?

Last Answer : A variety of specialized cells and tissues appeared with extracellular digestion to provide enzymes and special structures for the breaking down of dietary macromolecules. This phenomenon ... for other tasks and differentiations while benefiting from nutrients distributed through the circulation.

In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Description : In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.

Last Answer : (a) cellular totipotency

Ductal lavage is used for a) women at higher risk for benign proliferative breast disease. Performed in the doctor’s office, a microcatheter is inserted through the nipple while instilling saline and retrieving the fluid for analysis. It has been shown to identify atypical cells in this population and has been found to be adept at detecting cellular changes within the breast tissue.

Description : Ductal lavage is used for a) women at higher risk for benign proliferative breast disease. Performed in the doctor's office, a microcatheter is inserted through the nipple while instilling saline ... risk for benign proliferative breast disease; it is not specific for women with breast implants.

Last Answer : a) women at higher risk for benign proliferative breast disease. Performed in the doctor's office, a microcatheter is inserted through the nipple while instilling saline and retrieving the fluid ... population and has been found to be adept at detecting cellular changes within the breast tissue.

Name the cellular elements of Phloem tissue.

Description : Name the cellular elements of Phloem tissue.

Last Answer : Four types: 1. Sieve tubes 2. Companion cells 3. Phloem parenchyma and 4. Phloem fibres

List the cellular elements of xylem tissue?

Description : List the cellular elements of xylem tissue?

Last Answer : Xylem tracheids 2. Xylem tracheae or vessels 3. Xylem fibers and 4. Xylem parenchyma

What cellular structure must oxygen cross to get from the outside to the inside?

Description : What cellular structure must oxygen cross to get from the outside to the inside?

Last Answer : Need answer

What is The cellular structure that is responsible for synthesizing proteins is?

Description : What is The cellular structure that is responsible for synthesizing proteins is?

Last Answer : Feel Free to Answer

Which is correct about cell theory in view of current status of our knowledge about cell structure? (a) It needs modification due to discovery of subcellular structures like chloroplasts and mitochondria. (b) Modified cell theory means that all living being are composed of cells capable of reproducing. (c) Cell theory does not hold good because all living beings (e.g., viruses) do not have cellular organisation. (d) Cell theory means that all living objects consists of cells whether or not capable of reproducing

Description : Which is correct about cell theory in view of current status of our knowledge about cell structure? (a) It needs modification due to discovery of subcellular structures like chloroplasts and ... Cell theory means that all living objects consists of cells whether or not capable of reproducing

Last Answer : (c) Cell theory does not hold good because all living beings (e.g., viruses) do not have cellular organisation.

An organised and differentiated cellular structure having cytoplasm but no nucleus is (a) vessels (b) xylem parenchyma (c) sieve tubes (d) tracheids.

Description : An organised and differentiated cellular structure having cytoplasm but no nucleus is (a) vessels (b) xylem parenchyma (c) sieve tubes (d) tracheids.

Last Answer : (c) sieve tubes

An organised and differentiated cellular structure having cytoplasm but no nucleus is (a) vessels (b) xylem parenchyma (c) sieve tubes (d) tracheids.

Description : An organised and differentiated cellular structure having cytoplasm but no nucleus is (a) vessels (b) xylem parenchyma (c) sieve tubes (d) tracheids.

Last Answer : (c) sieve tubes

A plaque is a a. Change In Cell Structure Due To Viral Infection. b. Viral Cell Inclusion. c. Clear Zone Within A Lawn Of Bacteria. d. Cellular Aggregation Of Phage Heads.

Description : A plaque is a a. Change In Cell Structure Due To Viral Infection. b. Viral Cell Inclusion. c. Clear Zone Within A Lawn Of Bacteria. d. Cellular Aggregation Of Phage Heads.

Last Answer : c. Clear Zone Within A Lawn Of Bacteria.

During which step of cellular carcinogenesis do cellular changes exhibit increased malignant behavior? a) Progression During this third step, cells show a propensity to invade adjacent tissues and metastasize. b) Promotion During promotion, repeated exposure to promoting agents causes the expression of abnormal genetic information even after long latency periods. c) Initiation During this first step, initiators such as chemicals, physical factors, and biologic agents escape normal enzymatic mechanisms and alter the genetic structure of cellular DNA. d) Prolongation No stage of cellular carcinogenesis is termed prolongation.

Description : During which step of cellular carcinogenesis do cellular changes exhibit increased malignant behavior? a) Progression During this third step, cells show a propensity to invade adjacent tissues and ... of cellular DNA. d) Prolongation No stage of cellular carcinogenesis is termed prolongation.

Last Answer : a) Progression During this third step, cells show a propensity to invade adjacent tissues and metastasize.

Which Phloem cellular element has tubular structure with perforated walls?

Description : Which Phloem cellular element has tubular structure with perforated walls?

Last Answer : Sieve tubes

Water potential in leaf tissue is “positive” (near zero) during: (a) Low transpiration (b) Excessive absorption (c) Excessive transpiration (d) Gestation

Description : Water potential in leaf tissue is “positive” (near zero) during: (a) Low transpiration (b) Excessive absorption (c) Excessive transpiration (d) Gestation

Last Answer : Ans. ((d))

What structure does oxygen and carbon dioxide move in and out of a leaf through?

Description : What structure does oxygen and carbon dioxide move in and out of a leaf through?

Last Answer : Need answer

How is the structure of the leaf adapted for gas exchange?

Description : How is the structure of the leaf adapted for gas exchange?

Last Answer : Stomata and the thickness of the leaf

What is the structure of the leaf that allow gas exchange?

Description : What is the structure of the leaf that allow gas exchange?

Last Answer : Need answer

tRNA has (A) Clover leaf structure (B) anticodon arm (C) poly ‘A’ tay 3’ (D) Cap at 5’ end

Description : tRNA has (A) Clover leaf structure (B) anticodon arm (C) poly ‘A’ tay 3’ (D) Cap at 5’ end

Last Answer : Answer : A

The structure of tRNA appears like a (A) Helix (B) Hair pin (C) Clover leaf (D) Coil

Description : The structure of tRNA appears like a (A) Helix (B) Hair pin (C) Clover leaf (D) Coil

Last Answer : Answer : C

Conglobate gland is a leaf like structure found in – (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Description : Conglobate gland is a leaf like structure found in – (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Last Answer : (2) Male Cockroach Explanation: Conglobate gland is a leaf like, median, unbranched gland of male cockroach. It lies below the ejaculatory duct and open into the genital pouch close to the male genital aperture.

Write the internal structure of leaf?

Description : Write the internal structure of leaf? 

Last Answer : A) Anatomy: - Epidermis is present in upper and lower structure of leaf. Upper parts are the cells that have no inter cellular space. Lower parts contain stomata. Stomata are the combination of ... is present in bundles and its function is the transportation of food in different parts of plant. 

What is Decision Tree? a) Flow-Chart b) Structure in which internal node represents test on an attribute, each branch represents outcome of test and each leaf node represents class label c) Flow-Chart & Structure in which internal node represents test on an attribute, each branch represents outcome of test and each leaf node represents class label d) None of the mentioned

Description : What is Decision Tree? a) Flow-Chart b) Structure in which internal node represents test on an attribute, each branch represents outcome of test and each leaf node represents class label c) ... branch represents outcome of test and each leaf node represents class label d) None of the mentioned

Last Answer : c) Flow-Chart & Structure in which internal node represents test on an attribute, each branch represents outcome of test and each leaf node represents class label

Which form of RNA has a structure resembling clover leaf? (a) rRNA (b) hnRNA (c) mRNA (d) tRNA

Description : Which form of RNA has a structure resembling clover leaf? (a) rRNA (b) hnRNA (c) mRNA (d) tRNA

Last Answer : (c) mRNA

Which form of RNA has a structure resembling clover leaf? (a) rRNA (b) hnRNA (c) mRNA (d) tRNA

Description : Which form of RNA has a structure resembling clover leaf? (a) rRNA (b) hnRNA (c) mRNA (d) tRNA

Last Answer : tRNA

n Pinus/gymnosperms, the haploid structure are (a) megaspore, endosperm and embryo (b) megaspore, pollen grain and endosperm (c) megaspore, integument and root (d) pollen grain, leaf and root.

Description : n Pinus/gymnosperms, the haploid structure are (a) megaspore, endosperm and embryo (b) megaspore, pollen grain and endosperm (c) megaspore, integument and root (d) pollen grain, leaf and root.

Last Answer : (b) megaspore, pollen grain and endosperm

Leaf reflectance depends primarily on: (A) The pigments (B) Internal cell structure (C) Equivalent water content (D) All of these

Description : Leaf reflectance depends primarily on: (A) The pigments (B) Internal cell structure (C) Equivalent water content (D) All of these

Last Answer : Answer: Option D

Conglobate gland is a leaf like structure found in (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Description : Conglobate gland is a leaf like structure found in (1) Female Cockroach (2) Male Cockroach (3) Male Ascaris (4) Female Ascaris

Last Answer : Male Cockroach

What is the structure of sclerenchyma tissue ?

Description : What is the structure of sclerenchyma tissue ?

Last Answer : The cells of this tissue are hard , very long and have thick walls. Tissue is protoplasm -free , lignin-containing, and is specifically for mechanical work. Although protoplasm is present in the ... very thick and ligninous. Mature scleroid cells are usually dead. The cell wall is well-contained.

Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation is completed before 6 weeks of pregnancy .

Description : Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation is completed before 6 weeks of pregnancy .

Last Answer : Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation ... . If both Assertion & Reason are False.

tissue which from the basic structure of lymhoid organs , spleen stc, is :

Description : tissue which from the basic structure of lymhoid organs , spleen stc, is :

Last Answer : tissue which from the basic structure of lymhoid organs , spleen stc, is : A. Lymphoid tissue B. Cartilage tissue C. Elastic tissue D. Areolar tissue

The kind of tissue that forms the supportive structure in our pinna (external sears) is also found in

Description : The kind of tissue that forms the supportive structure in our pinna (external sears) is also found in

Last Answer : The kind of tissue that forms the supportive structure in our pinna (external sears) is also found in ... nose B. Vertebrae C. Nails D. Ear ossicles