OSSC TGT OSSSC Science CBZ Mock Test - 8 Free Online Test 2026

The teacher should focus on every child so that no one feels leftover, scolding weak students will discourage them, the teachers to support them so that they get motivation from their support. When children have positive support then they can work better than before and when we applause for someone and appraise for something then that children will boost up their morale.
Hence, the correct answer is "Applause and tell them to do work".

Sternberg's Triarchic Theory of Intelligence is also known as three forms of intelligence propounded by Robert Sternberg, who was a prominent figure in the research of human intelligence. The theory explains the basic information processing components consist of three facets:

• Componential-Analytical Subtheory
• Experiential-Creative Subtheory
• Practical-Contextual Subtheory

Hence, the correct answer is, 'Practical Intelligence.'

A meristematic tissue is a group of similar and immature cells that are in continuous state of division. These tissues are found in growing regions of plants. The chief characteristics of these tissues are:
(i) The cells may be round, oval, polygonal or rectangular.
(ii) They have thin cellulosic cell walls.
(iii) They do not have intercellular spaces.
(iv) They have dense cytoplasm with prominent nuclei.
(v) Vacuoles are absent or many small vacuoles may be present. The cells are in active state of metabolism.

Jan Ingenhousz's experiments with an aquatic plant showed that in bright sunlight, small bubbles containing oxygen were formed around the green parts of the plant, while in the dark, they did not. This demonstrated that sunlight is essential for the process by which plants release oxygen.

Cytokinin is named as anti-ageing hormone.

Exponential growth is represented by initial size and growth rate and time. If W₁ is the final size,W₀ is the initial size, r is growth rate and t is the time of growth than exponential growth is W₁ = W₀.ert.

Respiratory quotient is the ratio of number of carbon dioxide molecules to the number of oxygen molecules during respiration. R.Q is less than one in case of protein

• Phanerogams contain specialized reproductive organ and don’t follow cryptogamae.
• Phanerogams are classified as Gymnosperms and Angiosperms based on the type of seed they produce.
• Gymnosperms have naked seeds and Angiosperms have covered seeds.
• Angiosperms bear fruit whereas Gymnosperms don’t.

• Spirogyra has thin and flat ribbon-shaped chloroplasts. These chloroplasts are spirally coiled in the structure.
• The chloroplasts present in Spirogyra have one or more pyrenoids present over them.

Fig: Spirogyra

Hence, the correct option is B.
NCERT Reference: topic “ALGAE” of chapter Plant Kingdom.

Photosynthesis takes place in the green leaves of plants and other green parts of plants like stem etc. The most active photosynthetic tissue in higher plants is the mesophyll of leaves. Mesophyll cells have many chloroplasts, which contain the specialized light-absorbing green pigments, the chlorophylls. When chlorophyll absorbs light, it gets excited and emits electrons. These chlorophylls are found in photosynthetic units called Photosystem I and Photosystem II. Each unit has a specific reaction centre which contains pigment molecules. These molecules absorb light of different wavelengths and emit electrons. Due to the photon of light, electrons of chlorophyll get excited. These electrons are picked up by an electron acceptor which passes them to an electron transport system of cytochromes. The excitement of electrons of chlorophyll b photon of light is the first step of photosynthesis.

The density of a population in a given habitat during a given period changes due to changes in four basic processes, two of which (natality and immigration) contribute to an increase in population density and two (mortality and emigration) to a decrease. In a zero population growth density natality is balanced by mortality. 
 

• Ectopic pregnancy occurs in regions other than the uterus.
• An ectopic pregnancy occurs when a fertilized egg implants and grows outside the main cavity of the uterus. 
• Most ectopic pregnancies (90%) occur in the fallopian tube, which are known as tubal pregnancies, but implantation can also occur on the cervix, ovaries, cesarean scar, or within the abdomen.

Cleavage is a series of rapid mitotic divisions of the zygote, characterised by absence of growth in daughter cells, which converts a single celled zygote into a multicellular structure called blastocyst. It starts in the Fallopian tube and is holoblastic. Interphase in cleavage division is short and don not involve growth so that the resulting blastomeres become smaller in size as their number increases. During cleavage, at 8-16 celled stage, a solid ball of cells called morula (as it look like mulberry) is formed.

The microsporangial wall’s outer three layers—the epidermis, endothecium, and middle layers—help to shield developing anthers and act as a mechanism for dehiscence in adult anthers.

Pollen grain consists of hard covering of exine but their viability may lost with time. For Hybridisation pollen grains are collected and stored in liquid nitrogen below -196 degree Celsius temperature.

Mitochondria are absent in prokaryotes. Mesosomes are characteristic circular to villiform specialisation of cell membrance of bacteria that develop as an ingrowth from the plasma membrane. It helps in nucleoid replication and cell division. Lateral mesosome is not connected with nucleoid. It contains resspiratory enzymes and is, therefore, often called chondrioid. It is believed to be equal to mitochondrion of eukaryotes. However, respiratory enzymes are also present over the plasma membrane.

Formula = the rate of change in population size) = (the contribution of each individual to population growth) x (the number of individuals in the population

A free living thalloid body of the acellular slime moulds is called plasmodium. The plasmodium is wall-less mass of multinudeate protoplasm covered by slime. All the nuclei in the plasmodium divide simultaneously. Chlorophyll is always absent. The plasmodium often possesses a number of branched veins. The protoplasm present in the veins shows reversible streaming movement. The veins disappear and reappear as the plasmodium moves about.

The word “Taxa” means classification. And the study of taxa is called as taxonomy. Taxonomy is the classification of animals into different taxa and helps us to study organisms easily.

 In the binomial nomenclature system, the second part of the name, 'leo' in Panthera leo, is the specific epithet and refers to the species. This system, developed by Carl Linnaeus, ensures each species has a unique, universally accepted scientific name comprising a genus name followed by a specific epithet.

Primary productivity is the rate at which solar energy is converted and stored by the producers per unit area over a time period. It involves the conversion of solar energy into organic substances by photosynthetic and chemosynthetic autotrophs.

Uracil nitrogenous base is produces nucleoside only with ribose sugar. This nucleoside is present only inside the RNA and absent in DNA.

• The haploid phase of life cycle occurs when the total chromosome number inside the cell is reduced to half.
• It occurs by the process of meiosis.
• Fertilization restores the diploid phase of life cycle.

Hydrochloric acid ionises as follows :
HCl→ H⁺ +Cl^- 
H⁺ ions combine with water molecules to form H₃O⁺. Therefore, the ions present in dilute aqueous solution of hydrochloric acid are H₃O⁺ and Cl^-.

Separating Kerosene Oil and Water

At room temperature, Bromine is present in liquid state. Bromine is a non-metal belonging to family of halogens.

Cattle diet varies from one period to another period. Generally the diet of cattle includes 15-10% of roughage and rest of them includes concentrate and other materials.

SI unit of pressure is Pascal

Diffusion refers to the process by which different particles intermingle with each other as a result of their kinetic energy.