Assertion Reason Question On Grade 11 Placentation Test

Archegonium is, absent in thallophtes (algae and fungi). The, stimulus and response thus, forms a reflex, arc., Rabies, is, an, overwhelming, encephalomyelitis and includes severe, headache and high fever with excitement, and depression. Hydrogen, atoms combined with all oxygen atoms to, form water leaving no free oxygen. Assertion reason question on grade 11 placentation definition. A combination' of species richness, and equitability/evenness is used to, represent diversity within a community or, habitat. Page 156: EBD_7166, 152,, Assertion Reason Question Bank,, Solutions, 1.,, 2.,, 3.,, 4.,, (a) The somatotropin (STH), also called, growth hormone (GH) is secreted by the, anterior lobe of pituitary gland., Somatotropin stimulates body growth by, stimulating retention of proteins and, calcium in the body, synthesis and, deposition of proteins in tissues, growth, and elongation of long bones, and, proportionate growth of muscles and, visceral organs. Assertion: Head of sperm consists of acrosome, and mitochondria., Reason: Acrosome contains spiral row of, mitochondria., [AIIMS 2014], 27. Assertion: Visual acuity is the greatest at fovea., Reason: The fovea is a thick area of the retina, where both rods and cones are present., 37. This can prevent, conception.,, 22. D) Root pressure is a pressure produced in the, roots of plants, causing exudation of sap from, cut stems and guttation of water from leaves., The pressure is generated by the, concentration of solutes in the xylem of the, root and stem which then causes water to, move into the xylem by osmosis., 16.

• Assertion reason question on grade 11 placentation pdf
• Assertion reason question on grade 11 placentation definition
• Assertion reason question on grade 11 placentation text
• Assertion reason question on grade 11 placentation list
• Assertion reason question on grade 11 placentation and practice

Assertion Reason Question On Grade 11 Placentation Pdf

B) Agrobacterium is natural genetic engineer, of plants. There are several kinds, of Cry proteins, which are is toxic to a, different group of insects. C) Lacunae and sinuses are the open spaces, and channels that are present in the tissues, of prawn.

The diaphragm and external, intercoastal, muscle, contracts, simultaneously. Which are formed by dehydration and, condensation. A) Water molecules possess kinetic energy., Water molecules are in random motion in, liquid and gaseous form. Even in, these species, all cells in a given population, are not capable of active uptake of DNA., Only competent cells, which possess a so, – called competence factor are capable of, serving as recipients in transformation., (b) Paramecium aurelia has two strains: killer, and sensitive. But in some persons, the virus, may remain silent for long periods (upto 10, years) before symptoms of full blown AIDS, are observable. Assertion: Holoblastic cleavage with almost equal sized blastomeres is a characteristic of placental animals.Reason: Eggs of most mammals, including humans, are of centrolecithal type. The sperm, used in artificial insemination may be, provided by either the woman's husband, or partner (partner sperm) or by a known or, anonymous sperm donor., 36. By removing the meristem, and growing in vitro, virus free plants can, be obtained.

Assertion Reason Question On Grade 11 Placentation Definition

Since, each, NADH is equivalent to 3 ATP, so net gain, in glycolysis is 8 ATP., (a) Glycolyis occurs in cytoplasm as all, necessary enzymes are found in it. Four molecules, of ATP are produced in the conversion of 1,, 3-diphosphoglycerate to 3-phosphoglycerate and phosphenol pyruvate to, pyruvate whereas, two molecules of, NADH2 are formed during oxidation of, glyceraldehyde, 3-phosphate, to, 1, 3-diphosphoglycerate. It is in, fact a modified part of coelom consisting, of a system of canals containing sea water, and amoeboid corpuscles. Oceans are a low productivity, ecosystems., Reason: In aquatic ecosystems, productivity is, limited by light that decreases with increasing, water depth., Assertion: During the process of photosynthesis, amount of organic matter synthesized by, producers per unit time and per unit area is, referred to as net primary productivity., Reason: Due to abundance of sunlight. Assertion reason question on grade 11 placentation list. Roots such as corms, stem, tubers, rhizomes, and stolon undergo, vegetative reproduction. As cross, fertilization occurs in earthworm, the, sperms of one worm is transferred to, spermathecae of the other., Insect blood is colourless and does not, play any role in transport of oxygen. Fossils, formed through petrification are termed, petrified fossils.

Assertion Reason Question On Grade 11 Placentation Text

DDT was, originally used during world war II to control, typhus which was spread by body louse., Since then it has been used to control mosquito, borne malaria and was used extensively as a, general agricultural insecticide. Assertion: Bryophytes and pteridophytes, contain well-developed antheridia., Reason: Biflagellate sperms are formed by their, antheridia., 41. Assertion (A): When the urine moves through, the descending limb, it become hypertonic and, as it passes through the ascending limb of, Henle's loop it becomes hypotonic., Reason (R): The descending limb is permeable, to sodium ions, while the ascending limb is, impermeable to sodium ions., 32. Its secretion is, under the influence of Luteinizing Hormone, (LH) of the anterior lobe of pituitary gland., Testosterone controls the development of, secondary sexual characters in males like, hoarseness of voice, development of facial, hairs, bone growth, calcium retention,, closing of epiphysial cartilage. Development of male, gametophyte is precocious, that is, it, begins inside the microsporangium or, pollen sac. D) Agrobacterium tumefaciens infects certain, plants, (dicots) in which Ti-plasmid causes, the formation of tumour like growth called, a crown gall. Try BYJU'S free classes today! Assertion: IgM is a type of immunoglobulin which cannot cross the placenta. Reason: IgM is pentamer immunoglobulin, joined by J chain. They provide, energy for the movement of the sperm. Thromboplastins are, the coagulation promoting substances, released from clumped platelets and, damaged tissue, which helps in the, formation of the enzyme prothrombinase., (d) Regulation of RBCs production is, accomplished by hormone erythropoietin, which is secreted by kidney. Highly, reduced female gametophytes termed, embryo sacs are present within ovules. The rest is, lost in transpiration. Floating, ribs are responsible for protecting the, kidney.

Intrinsic factors include, intracellular genetic factors and, intercellular factors growth regulators., Extrinsic factors are light, temperature,, water, oxygen and nutrition, etc., 8., (a) Secondary roots and shoots are, plagiogeotropic i. e., they grow to a position, at an oblique angle (45°) to the gravitational, force. They lack, cambium hence, seconday growth is, absent. Assertion reason question on grade 11 placentation and practice. Dominant, vegetation consists of evergreen conifers, which are able to tolerate wide fluctuation, of temperature, light and soil. The labia, minora are paired folds of tissue under the, 7.

Assertion Reason Question On Grade 11 Placentation List

The, chromosomes separate from each other, during anaphase., (a) Mitosis keeps all the somatic cells of an, organism genetically similar, resembling the, fertilized egg. Assertion: Cleavage in human zygote is, holoblastic., Reason: Human egg contains abundant yolk in, ooplasm., 57. A) The genetic code is applicable universally,, i. e., a codon specifies the same amino acid, from a virus to a tree or human being. In many aquatic plants with emergent flowers, pollination occurs by wind or insects, e. g., Lotus, Water Lily, Water Hyacinth, etc. They,, therefore, get killed. Heterozygotes (AS) with the, sickle-cell allele are resistant to malaria., Therefore, they are more likely to survive, and reproduce. D) Collateral vascular bundles have the xylem, pointing towards the inner side of the, phloem. Down syndrome also known, as trisomy 21, is a genetic disorder caused, by the presence of all or part of a third copy, of chromosome 21., 68. A) Due to reversible turgor changes in the cells,, many plant movements are produced. Therefore, dosage, compensation regulates the level of enzyme, in males and females., (b) An autosome linked recessive trait, sickle, cell anaemia that can be transfered from, parents to the offspring, if both the partners, are carrier for the gene (or heterozygous)., The defect is caused by the substitution, of Glutamic acid (Glu) by Valine (Val) at the, sixth position of the beta globin chain of, the haemoglobin molecule. Assertion: Scurvy is caused by deficiency of, vitamin C., Reason: Deficiency of ascorbic acid causes scurvy., [AIIMS 2001], 42.

The region of the, chromosome at which a particular gene is, located is called its locus. The embryo gets nutrition from the mother's blood with the help of placenta. Assertion: Leucoplasts give rise to other types, of plastids., Reason: Chromoplasts do not get changed to, other types of plastids., 37. The wall of the uterus has, three layers, external thin membranous, perimetrium, middle thick layer of smooth, myometrium and inner glandular layer of, endometrium., Infundibulum is funnel shaped end of, fallopian or oviduct. D) Cannabis sativa or Hemp is an annual herb, of cannabaceae family. Interferons are, a group of related low molecular weight, regulatory cytokines produced by certain, eukaryotic cells in response to a viral, infection. In this way, adaptive traits preserved by, natural selection will gradually change the, charactertistics of a species., Reason: This explains the origin of species.,, 47. C) During the hydrolysis of typical chemical, bonds, about 3000 calories per mole are, liberated.

Assertion Reason Question On Grade 11 Placentation And Practice

They, suppress the sperm motility. There are, three thermal strata -Epilimnion (upper, stratum of water), Metalimnion (middle, stratum of water) and the Hypolimnion, (lower stratum of water). Fish heart contains, and pumps only deoxygenated blood. In symplastic movement, the, water travels through the cells-their, cytoplasm; intercellular movement is through, the plasmodesmata. The amount of oxygen is very, high. It will, help the human race to have adequate food, to meet their daily food and nutritional, requirements. Assertion: The splitting of water is associated, with PS II., Reason: Water is split into H+, O2 and electrons., 19. These are embedded in, the skin. Phyllotaxy is the arrangement of, leaves on the stem or its branches., 28.

This is due to the high cost of, isolating and purifying enzymes in, sufficient quantities. It is, widely grown in coastal and deltic regions, of tropical and subtropical countries., Coconut fruit show hydrochory i. e., the, dispersal takes place through water, medium. No, human activities are allowed there. 2% animal, change., 33. The cambium, present between xylem and phloem is called, fascicular cambium. Increase in size disturbs, the nucleo –cytoplasmic ratio. Assertion: Mucous membrane immobilises the, micro-organisms in the body., Reason: Micro-organisms and dust particles, entering the respiratory tract are trapped in the, mucus., 19. Its major function, is absorption or secretion.

A food, chain only follows just one path as animals, find food. Fertilizers which are mainly NPK, are required to increase the harvest of, crops., Plant breeding involves selection of, parents with desired characters, their, crossing and selection of hybrid progeny, with desired character. In several cereals, they are, obtained from embryo. B) Cannabinoids is a group of chemicals,, which interact with cannabinoid receptors, present principally in the brain. These were formerly regarded as, neuromast organs but Sand (1938) has, proved that these are thermoreceptor, organs. A) A normal electrocardiogram (ECG) is, consists of P wave, a QRS wave (complex), and a T wave. A),, and no vasa recta. Assertion: Both male and female can be infertile., Reason: Infertility can result due to any fertility, related disorder., 34. They are separated into two, different families - Felidae and Canidae,, respectively., Family is a taxonomic category which, contains one or more related genera. The south western ghats, moist deciduous forests are a tropical, moist broad leaf forest ecoregion of, southern India. Assertion: Insulin is an anabolic hormone., Reason: A fall in blood amino-acids also, increases insulin secretion., 23.

The, accumulation of heavy metal cations in, mosses enables them to be used as, pollution indicators., In bryophytes, antheridia are well, developed and often possess a stalk.