Biology Section 7


  • Mitochondria in ear lobe cells are nearly 50.
  • Four daughter cells are given rise during the process of meiosis.
  • Mitosis gives rise to two daughter cells during cell division.
  • In animals, meiosis produces gametes.
  • Prokaryotic and eukaryotic are two types of cells.
  • Cells are of 2 types.
  • Gametophyte of Psilopsida develops a symbiotic association with fungus.
  • Psilotum is an example of a living member of Psilopsida.
  • Selaginella is characterized by heterosporous spore production.
  • Sphenopsids are also called arthrophytes.
  • Equisetum (Horsetail) is an example of Sphenopsida.
  • Bryophytes are called amphibians of the plant world due to their habitat.
  • The land habitat is dominated by tracheophytes (vascular plants).
  • Hornworts are included in the sub-class Anthoceropsida.
  • A characteristic of plants in Psilopsida is that aerial branches have veinless outgrowths.
  • Horsetails are included in the class Sphenopeida.
  • Megaphylls are characteristic of seed plants.
  • In bryophytes, fertilization takes place in archegonia.
  • The arrangement of unequal dichotomous branches is called planation.
  • Heterospory involves the production of two types of spores.
  • Chlorenchyma cells occupy the space between the overtopped dichotomous branches in megaphylls’ evolution.
  • Sporangia of Psilopsida develop singly on the upper side of sporophylls.
  • The zygote formed in liverworts is unicellular.
  • Ground pries are also known as Lycopods or Spike mosses.
  • Sporophyte is diploid.
  • The first plant group to form true leaves is Lycopsida.
  • Megaphylls (leaves with divided veins) are characteristic of Ferns and seed plants.
  • Mosses are included in the sub-division Bryopsida.
  • The arrangement of unequal dichotomous branches is called planation.
  • The simplest of all bryophytes are liverworts.
  • Filicinae, a group of tracheophytes, does not belong to Sphenopsida.
  • Antheridiophore and archegoniophore are found in both Marchantia and Funaria.
  • The property of Adiantum that gives it the name “Maidenhair fern” is the presence of shiny hair-like structures on the leaf stalk and rachis.
  • Integuments are specialized protective coverings around the megasporangium that vary in number.
  • Protonema is algae-like in nature.
  • Gymnosperms are tracheophytes in which ovules are born on the exposed surface of megasporophylls.
  • Pinus, Taxus, and Picea belong to the group Gymnosperms.
  • Anthoceropsida is the most advanced group among the listed options.
  • Meiosis is responsible for the production of megaspores in Pinus.
  • The arrangement of dichotomous branches in leaves’ evolution is called planation.
  • Microspores of seed plants that contain male gametophytes, including the gamete, are called pollen grains.
  • The part of the sporophyte called the sporangium is the capsule.
  • Monocots are characterized by having sepals and petals in multiples of 3.
  • The function of type A behavior is to transmit nerve impulses from receptors to the central nervous system.
  • The structure that carries deep pressure and vibration sensations is Pacinian corpuscles.
  • Imprinting is the simplest form of learning.
  • Charles Darwin was the first to propose an objective definition of instinct.
  • Taxes are the type of behavior enabling pillbugs to reach a moist area.
  • Lycopsida are tracheophytes in which sporangia develop singly on the upper side of sporophylls.
  • Psilopsida are leafless tracheophytes.
  • Chlorosis, a yellowish hue on the leaves, results from the deficiency of chlorophyll, accumulation of toxic waste products, and short supplies of mineral nutrients in the soil.
  • Indole acetic acid is the chemical name for auxins.
  • Gibberellins promote flowering in long day plants by substituting for red light.
  • Abscisic Acid is antagonistic to auxin in promoting stem growth.
  • Gibberellins are antagonistic to abscisic acid in terms of flowering.
  • Gibberellins are used in the brewing industry to promote malting.
  • Mechanoreceptors are the type of receptors present in the ear.
  • Nociceptors are responsible for the perception of pain.
  • Outer ear and Middle ear both are the parts of the ear.
  • The first step in the visual process is the absorption of light.
  • Retinene and opsin are the two parts of rhodopsin pigment.
  • Beta-carotene is a terpenoid compound found in the carrot root.
  • Olfactory receptors are responsible for the sense of smell.
  • Rod cells are highly sensitive to dim light.
  • Aqueous humor nourishes the cornea and lens in the eye.
  • The part of the eye that gives color to the iris is the pigmented epithelium.
  • Rhodopsin is the visual pigment found in rod cells.
  • The lens of the eye changes its shape through the process of accommodation.
  • The auditory ossicles in the middle ear amplify sound vibrations.
  • The cornea is responsible for refracting light into the eye.
  • Myopia is also known as nearsightedness.
  • The spiral organ of Corti is responsible for converting sound vibrations into nerve impulses.
  • Hyperopia is also known as farsightedness.
  • Vitreous humor helps maintain the shape of the eyeball.
  • Cones in the retina are responsible for color vision.
  • Glaucoma is a condition characterized by increased intraocular pressure.
  • Astigmatism is caused by an uneven curvature of the cornea or lens.
  • The auditory cortex is responsible for processing sound information in the brain.
  • Ciliary muscles control the shape of the lens for focusing.
  • Eustachian tube helps equalize pressure between the middle ear and the atmosphere.
  • The retina contains photoreceptor cells called rods and cones.
  • The blind spot is the area on the retina where the optic nerve exits the eye.
  • Sound waves are transmitted through the ear by the vibrations of the tympanic membrane.
  • Color blindness is a result of a deficiency in certain types of cones in the retina.
  • The fovea is the central area of the retina responsible for high acuity vision.
  • Cochlea is responsible for converting sound vibrations into neural signals.
  • The lens of the eye focuses light onto the retina.
  • Olfactory bulbs process sensory information related to smell.
  • The stapes bone in the middle ear is connected to the oval window of the cochlea.
  • The iris controls the size of the pupil and the amount of light entering the eye.
  • Optic chiasm is the point where optic nerve fibers from each eye cross over.
  • The olfactory epithelium contains receptors for detecting odor molecules.
  • Tinnitus is the perception of ringing or noise in the ears.
  • The pinna is the visible part of the external ear.
  • Gustatory receptors are responsible for the sense of taste.
  • The macula is responsible for central vision and detailed perception.
  • Auditory hair cells are responsible for converting sound vibrations into electrical signals.
  • Olfactory information is processed in the olfactory cortex of the brain.
  • Sound localization is possible due to the brain’s ability to compare timing and intensity of sounds reaching each ear.
  • The auditory tube connects the middle ear to the throat, helping to equalize pressure.

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