PES SS 3 Biology Mock 1 Exam 2026/27
A) Cellulose cell wall B) Cell membrane C) chlorophyII D) large vacuole
A) decrease in size and become flaccid B) expand and then burst C) enlarge and then become turgid D) expand and then shrink
A) gametes of parents have different genetic composition B) genetic materials come from parents of two different species C) greater amount of DNA is involved in sexual reproduction D) sexual reproduction is a lengthy process
A) pectoral girdle B) upper arm C) lower arm D) pelvic girdle
A) liver B) pancreas C) heart D) testes
A) hepatic vein B) hepatic artery C) hepatic portal vein D) mesenteric artery
A) thyroxine B) adrenaline C) insulin D) parathormore
A) skin B) hypothalamus C) pituitary gland D) adrenal gland
A) three B) four C) one D) two
A) parathormore B) adrenaline C) insulin D) thyroxine
A) cockroach B) grasshopper C) butterfly D) locust
A) the optimum temperature is attained B) the ph of the medium is altered C) the atmospheric pressure is altered D) there is an increase in substrate concentration
A) sunlight B) wind C) carbon (IV) oxide D) water
A) in a synthesized form, from other living organisms B) by synthesizing simple substances using energy C) from other organisms in exchange for some products D) by utilizing its store energy
A) reduction of carbon (IV) oxide to form carbohydrate B) breaking down of ATP molecules to produce energy C) splitting of water molecules to form hydrogen ions D) ormation of two molecules of phosphoglyceric acid
A) gloriosa B) venus flytrap C) Utricularia D) pitcher plant
A) habitat B) population C) succession D) community
A) grasshoppers would decrease B) grasses available to grasshoppers C) grasshoppers would increase D) hawks would increase
A) no gills B) no scales C) fore limbs D) lateral line
A) multiple epidermis B) succulent stem C) finely divided leaves D) heavily lignified tissue
A) predation B) commensalism C) mutualism D) parasitism
A) likely to disappear from the surface of the earth B) dangerous to humans and attacking other animals C) reproducing profusely in an area D) dangerous to humans and attacking other animals
A) Living near dirty gutter / Lung cancer, syphilis, river blindness B) Having multiple sexual partners / liver cirrhosis, syphilis, AIDS C) Smoking cigarette / Liver cirrhosis. Lung cancer, AIDS D) Eating uncooked meatf/fdysentery, cholera. food poisoning.
A) discouraging poaching B) mulching C) use of cover crops D) crop rotation
A) water B) soil C) forest D) garbage
A) chiasmata are not formed B) Bi-valents are not formed C) It does not lead to variation D) Four daughter cells are produced
A) change the blood group B) facilitate dissolution of clot C) have no effect on blood composition D) lead to agglutination
A) produce numerous seeds within a short time B) produce one generation in a large period C) have a small number of chromosomes D) have a relatively short life cycle
A) it is caused by recessive genes B) two sickle cell carrier parents may have a sickling child C) it is more common in males than in females D) it is caused by sex-linked genes
A) BB B) BBbb C) bb D) Bb
A) it will hinder her from having blood transfusion from her husband B) her children may all resemble her husband C) it will result in sickness and probably death of the offspring D) it may affect her childbearing ability
A) butterfly B) termite C) cockroach D) housefly
A) reduction in population B) gene mutation C) climate change D) change of habitat
A) well developed acquired characters are inheritable B) survivors in a competitive community must have inherited useful traits C) great changes in the environment result in corresponding changes in species D) frequently used organs become well developed while the ones not used become vestigial 
A) transverse and longitudinal B) transverse and cross C) cross and transverse D) longitudinal and transverse 
A) gamete formation B) asexual reproduction C) sexual reproduction D) bud formation 
A) cell B) tissue C) system D) organ
A) Ciliophora B) Rhizopoda C) Euglenophyta D) Rhodophyta 
A) I B) III C) II D) IV 
A) Reproduction B) Respiration C) Excretion D) Locomotion 
A) hypermetropia B) presbyopia C) myopia D) astigmatism
A) convex lens B) concave lens C) bifocal lens D) cylindrical lens 
A) keep cotton wool around the seedling to make it dry B) cover the culture vessel with opaque paper C) aerate the solution daily D) use a non-green plant for the experiment
A) inability of the plant to make food due to lack of sunlight B) inadequate supply of water to the plant C) excess supply of nutrients to the plant D) algal growth in the solution that used up the nutrients
A) used as a paddle for swimming B) used for killing prey in water C) used as a bait to catch fish in water D) effective in scratching the soil for food 
A) cell theory B) variation C) inheritance D) courtship behaviour
A) nucleus and cell wall B) cytoplasm and vacuole C) cytoplasm and nucleus D) cell wall and vacuole
A) IV B) III C) I D) II
A) II B) IV C) I D) III
A) Paramecium B) Volvox C) Euglena D) Spirogyra
A) endoplasmic reticulum B) nuclear membrane C) plasma membrane D) mitochondrion
A) Sheet of cellophane B) Unripe pawpaw fruit C) pig's bladder D) Yam tuber
A) Respiration can take place in yeast cells in the absence of oxygen B) Photosynthesis does not take place in the absence of oxygen C) Respiration does not occur in the mould D) The yeast cells carried out photosynthesis while the mould did not
A) Collenchyma B) Xylem C) Phloem D) Parenchyma
A) lung book B) lung C) trachea D) air sac
A) urine B) urea C) uric acid D) ammonia
A) capsule B) pelvis C) medulla D) bladder
A) release of secretion into ducts B) transportation by blood to target organ C) secretion of hormones D) having specific effect
A) spinal cord B) optic nerves C) cerebellum D) cerebrum
A) suspensory ligament becomes tight B) lens gets a longer focal length C) lens become more concave D) lens become more convex |
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