Biology Section 14

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• 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.