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(2bi)
(PICK ANY THREE)
(i) Sticky tongue for catching insects
(ii) Large, bulging eyes for increased field of vision
(iii) Camouflage skin for blending into the environment
(iv) Nocturnal habits to avoid predators
(v) Movable eyelids for protection
(vi) Glandular skin for defense against predators
(2bii)
[In a Tabular form]
-Arteries-
(PICK ANY FOUR)
(i) Carry blood away from the heart
(ii) Thicker, more muscular walls due to higher blood pressure
(iii) Narrower lumen (inner diameter)
(iv) Elastic recoil to maintain blood pressure
(v) Provide nutrients, oxygen, and hormones to tissues
(vi) Oxygenated blood, except for pulmonary arteries
(vii) High blood pressure
-Veins-
(PICK ANY FOUR)
(i) Carry blood towards the heart
(ii) Thinner, less muscular walls due to lower blood pressure
(iii) Wider lumen
(iv) Valves to prevent backflow of blood
(v) Collect deoxygenated blood from tissues
(vi) Return blood to the heart for reoxygenation
(vii) Low blood pressure
=•=•=•=•=•=•=Or this👇👇=•=•=•=•=•=•=•=•=•=•=•
(2ai)
(i) Wings (modified forelimbs)
(ii) Hollow bones (reduced weight)
(iii) Lightweight skeleton (reduced weight)
(iv) Powerful muscles (for wing movement)
(2aii)
-Pollen from anther (male part) is transferred to stigma (female part)
-Pollination occurs through agents like bees, butterflies, wind, or water
-Fertilization occurs when pollen germinates and sperm reaches the egg
-Seed formation and fruit development follow successful pollination
(2bi)
(i) Long, sticky tongue (for catching prey)
(ii) Specialized teeth (for holding onto prey)
(iii) Webbed feet (for movement and hunting)
(2bii)
[TABULATE]
=ARTERIES=
(i) Carry blood away from the heart
(ii) No valves (except for the pulmonary artery and aorta)
(iii) Narrower lumen compared to veins
(iv) Thick, muscular, and elastic walls
=VEINS=
(i) Carry blood towards the heart
(ii) Valves present to prevent backflow of blood
(iii) Wider lumen compared to arteries
(iv) Thinner, less muscular, and less elastic walls
•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•
(3ai)
(i) Phototropism (growth towards light)
(ii) Geotropism (growth towards gravity)
(iii) Hydrotropism (growth towards water)
(iv) Thigmotropism (growth towards touch)
(3aii)
(i) Loss of fertile land and decreased agricultural productivity
(ii) Increased sedimentation in water bodies, harming aquatic ecosystems
(3bi)
Grass=>Grasshopper=>Lizard=>Hawk
(3bii)
Diagram of the male reproductive system:
(3biii)
(i) Oxygen (O₂)
(ii) Glucose (C₆H₁₂O₆)
•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•
(4ai)
(i) Humerus
(ii) Radius
(iii) Ulna
(4aii)
Diagram
(4bi)
(i) Insulin (regulates blood sugar levels)
(ii) Adrenaline (responds to stress)
(iii) Growth Hormone (regulates growth and development)
(4bii)
-Amoeba: Contractile vacuole
-Hydra: Diffusion through body surface
-Earthworm: Nephridia
-Grasshopper: Malpighian tubules
(4biii)
(1) Mitochondria: Generates energy for the cell through cellular respiration
(2) Lysosomes: Contains digestive enzymes to break down and recycle cellular waste and foreign substances
•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•
(5a)
Diagram
(5bi)
[TABULATE]
=MONOCOT PLANTS=
(i) Leaf Venation; Parallel venation
(ii) Number of Flower Parts; Usually in multiples of three
=MONOCOT PLANTS=
(i) Leaf Venation; Reticulate (net-like) venation
(ii) Number of Flower Parts; Usually in multiples of four or five
(5bii)
(i) Fossil Record: Shows changes in species over time, with transitional forms demonstrating common ancestry.
(ii) Comparative Anatomy: Homologous structures (e.g., limb bones in vertebrates) indicate common ancestry.
(iii) Molecular Biology: DNA and protein sequence similarities among different species suggest evolutionary relationships.
(iv) Biogeography: Distribution of species across different geographical areas supports patterns of evolution and migration.
(5biii)
(i) Hinge Joint
(ii) Ball-and-Socket Joint
(iii) Pivot Joint
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BIOLOGY👇
01-10: EEDDDECAAE
11-20: DABBCACEBD
21-30: BCECCDDDAD
31-40: DDBEBAEDBC
41-50: BECABABCBE
51-60: ACDCDDCDBA
Completed
Biology
ANSWER THREE(3) QUESTIONS ONLY
(1ai)
(PICK ANY THREE)
(i) Producers
(ii) Consumers
(iii) Decomposers
(iv) Parasites
(v) Symbionts
(1aii)
(i) Mandibles
(ii) Maxillae
(iii) Labium
(1bi)
(i) Ultrafiltration: The initial step in blood filtration occurs in the glomerulus of a nephron, where pressure causes water, ions, glucose, urea, and small proteins to pass out of the blood vessels into the Bowman's capsule (glomerular filtrate).
(ii) Reabsorption: As the glomerular filtrate moves through the renal tubules, essential nutrients, glucose, water, and most ions are reabsorbed back into the bloodstream. This selectively conserves nutrients while eliminating waste products.
(iii) Secretion: Some substances, such as hydrogen ions (H+), potassium (K+), creatinine, and urea, are actively secreted from the bloodstream into the renal tubules, further concentrating the urine.
(iv) Concentration: The collecting duct and loop of Henle regulate the final water and ion balance of the urine, ensuring that waste products are sufficiently concentrated.
(1bii)
(PICK ANY TWO)
(i) Malleus
(ii) Incus
(iii) Stapes
(iv) Stapedius
(1biii)
[in a Tabular form]
-Photosynthesis-
(PICK ANY TWO)
(i) Process that uses sunlight to convert carbon dioxide and water into glucose
(ii) Occurs in plant cells, algae, and some bacteria
(iii) Releases oxygen as a byproduct
(iv) Builds organic molecules (anabolism)
(v) Takes place during the day in sunlight
-Respiration-
(PICK ANY TWO)
(i) Process that breaks down glucose to release energy
(ii) Occurs in all living cells
(iii) Consumes oxygen
(iv) Breaks down organic molecules (catabolism)
(v) Takes place continuously, day and night
=•=•=•=•=•=•=Or this👇👇=•=•=•=•=•=•=•=•=•=•=•
(1ai)
(i) Producers (plants, algae)
(ii) Consumers (animals, insects)
(iii) Decomposers (bacteria, fungi)
(1aii)
(i) Mandibles (jaws)
(ii) Maxillae (maxilla)
(iii) Labium (lower lip)
(1bi)
(i) Blood enters the glomerulus under high pressure, causing water, salts, glucose, and waste products to filter out of the blood into Bowman's capsule, forming a filtrate.
(ii) As the filtrate moves through the proximal convoluted tubule, loop of Henle, and distal convoluted tubule, essential substances like glucose, certain ions, and water are reabsorbed back into the blood.
(iii) Additional waste products and excess ions are secreted from the blood into the tubular fluid. The final product, urine, moves from the collecting ducts into the renal pelvis, down the ureters, and into the bladder for storage before excretion.
(1bii)
(i) Malleus (hammer)
(ii) Incus (anvil)
(1biii)
[TABULATE]
=PHOTOSYNTHESIS=
(i) Converts light energy into chemical energy stored in glucose.
(ii) Produces oxygen as a by-product
=RESPIRATION=
(i) Converts chemical energy in glucose into usable energy (ATP).
(ii) Produces carbon dioxide as a by-product
•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•=•
(2ai)
(PICK ANY FOUR)
(i) Lightweight bones
(ii) Strong flight muscles
(iii) Streamlined body shape
(iv) Hollow feathers for insulation and buoyancy
(v) Wings modified from forelimbs
(vi) Air sacs to reduce body density
(2aii)
(i) Pollination vector (e.g., insect, bird, wind) comes into contact with the flower.
(ii) Pollen grains from the another stick to the vector's body.
(iii) The vector carries the pollen to another flower of the same species.
(iv) Pollen grains are transferred to the stigma of the flower.
(v) If pollination is successful, the pollen tube germinates and grows down the style, delivering sperm cells to the ovary.
(vi) Fertilization occurs when a sperm cell fuses with an egg cell in the ovary, resulting in seed formation.
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F/Maths-Obj
1-10: EBDDBBDEBA
11-20: BDBBDBECEC
21-30: DCCABCDCBA
31-40: DDBACDBACA
41-50: EDACDBDCBD
Completed!!!
