Biology Section 14


  • The blood vessel carrying blood from the lungs to the heart is the pulmonary vein.
  • Infectious droplets do not transmit Rubella, the common cold, or influenza.
  • There are 14 “True Ribs” in the human body.
  • Transport of oxygen by blood takes place with the help of erythrocytes.
  • Major biological issues today encompass human population growth, infectious diseases, addictive drugs, and pollution.
  • Metabolism of photosynthesis and respiration involves the knowledge of biochemistry.
  • The body part that can be repaired, replaced, or removed is done through surgery.
  • Homologous chromosomes present in both males and females are known as autosomes.
  • A chromosome with centromere near the middle is called a submetacentric chromosome.
  • The X-chromosome is submetacentric in structure.
  • The Y-chromosome is acrocentric in structure.
  • A giant chromosome with multiple chromonemata is a polytene chromosome.
  • A chromatid is one half of a chromosome.
  • A dominant gene is expressed both in heterozygous and homozygous conditions.
  • The laws of segregation and dominance were given by Mendel.
  • The sum of genes in a population is referred to as the gene pool.
  • When two opposite alleles come together, one masking the other’s expression, it’s the law of dominance.
  • Blood does not clot in the blood vessels due to the presence of thrombin.
  • Fats are stored in the human body’s adipose tissue.
  • Insulin is secreted by beta cells.
  • The medulla oblongata controls internal organ activities.
  • When the left ventricle contracts, blood moves to the aorta.
  • The food-conducting tissue of a plant is phloem.
  • The haploid condition is found in the zygote.
  • Phenotype is the physically appearing character in an animal.
  • The frequency of a character increases when it is inheritable.
  • Six nucleosomes are found in the 30 nm chromatin fiber’s helical coil.
  • The seminiferous tubule cells may have fewer chromosomes than most body cells in mammals.
  • Balbiani discovered special chromosomes recognized by both bands and loops.
  • A functional unit gene is known as a cistron.
  • Genetic information is carried in the form of nucleotides.
  • Tjio and Levan gave the number of human chromosomes.
  • Excretion eliminates toxic waste and excess water in the human body.
  • The acid present in gastric juice is hydrochloric acid.
  • The pelvis girdle connects the legs to the vertebral column.
  • Carrots are a source of vitamin A.
  • The pancreas serves as an endocrine and exocrine gland.
  • Insulin secretion is attributed to beta cells.
  • The medulla oblongata receives blood from the left ventricle.
  • The food-conducting tissue in plants is phloem.
  • The zygote is in the haploid condition.
  • A gene is said to be recessive if it is expressed only in homozygous condition.
  • Dominance and segregation were proposed by Mendel.
  • Blood does not clot in the vessels due to thrombin.
  • Fats are stored in adipose tissue.
  • Beta cells secrete insulin.
  • The medulla oblongata controls internal organ activities.
  • When the left ventricle contracts, blood moves to the aorta.
  • Phloem conducts food in plants.
  • Phenotype refers to the physically appearing character in an animal.
  • Dysentery is a disease causing severe diarrhea and inflammation in the colon.
  • The “graveyard of RBCs” in the body is the spleen.
  • The “Blood Bank” in the body is the spleen.
  • The main use of salt in the diet is to produce a small amount of hydrochloric acid required for digestion.
  • Typhoid is caused by the bacteria Salmonella typhi.
  • Fresh yeast cells are a good source of Vitamin-B.
  • The fungus known as “Green Mold” is Penicillium.
  • Leprosy is caused by the bacillus discovered by Hansen.
  • Phloem is the tissue in plants that conducts food.
  • Fermentation takes place in the cytoplasm of a cell.
  • MDT is used for the treatment of Leprosy.
  • Oncogenes are responsible for causing cancer.
  • “Black foot disease” can be caused by the pollutant As (Arsenic).
  • Febries are cells of the sclerenchyma type.
  • BCG immunization is for Tuberculosis.
  • Pus is formed by dead White Blood Cells.
  • Mathematical processes occur in the left parietal lobe of the brain.
  • The carotid artery is located in the neck.
  • The condition characterized by an inability to see in dim light or at night is Nyctalopia.
  • Lalopathy means a disorder of speech.
  • Food is ground in the gizzard of a cockroach.
  • Operculum is present in bony fish.
  • Blood from the right ventricle is pushed into the pulmonary trunk.
  • Fertilization is the process in which a sperm joins with an egg.
  • Cerebellum allows precise muscular movements.
  • Plant cells have a Cell wall, which is absent in animal cells.
  • There are five kingdoms of life.
  • Amylase becomes denatured at an alkaline pH of 9.
  • Deoxygenated blood is carried by veins.
  • Prokaryotes lack a nucleus.
  • The organelle absent in animal cells and present in plant cells is the Cell wall.
  • Lysosomes do not contain DNA.
  • The first part of the small intestine is the duodenum.
  • Coughing while eating can be due to improper movement of the epiglottis.
  • Gastrin stimulates the production of gastric juice in the stomach.
  • Terrestrial plants carry out 10% of total photosynthesis.
  • The pH of fresh saliva is 8.
  • HIV is a single-stranded RNA virus.
  • AIDS is caused by the HIV virus.
  • Mendel studied seven traits of pea plants.
  • Human skin color is polygenic.
  • Morgan studied 85 traits of Drosophila.
  • The father of genetics is Mendel.
  • The link between living and non-living organisms is viruses.
  • Skeletal muscles are the most abundant in humans.
  • There are about 650 muscles in the human body.
  • A single heart beat involves three stages.
  • The heart beats about 2.8 billion times in one’s life.
  • Organ rejection is caused by T-lymphocytes.
  • Smallpox induces immunity.
  • Blue-green algae can serve as a biofertilizer for rice crops.
  • “Athlete’s Foot” is a disease caused by a fungus.
  • Epiphytes are plants that depend on other plants for mechanical support.
  • A line on a map connecting places that receive equal solar radiation is called an isohel.
  • The pathogen that causes Acne is Propionibacterium.
  • The process of egg formation in females is called oogenesis.

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