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Pteridophytes don't have seeds. They propagate by spores. · Gymnosperms are the earliest seed plants. Gymnosperms have advanced reproductive structures compared to pteridophytes. Gymnosperms produce seeds as well. Gymnosperms are the most advanced. Option D is the correct answer Thallophyta- body not differentiated into roots and stem,no vascular system,no seed formation Bryophyta- body differentiated but lack vascular system,no seed formation Pteridophyta- well- differentiated body, vascular system present, no seeds formation Gymnosperms- well-differentiated body with vascular system, seeds are naked(not enclosed in a fruit) Angiosperms- well-differentiated body with vascular system, seeds are covered(enclosed in a fruit)

Many monocot leaves are sword-shaped. Monocot leaves are typically narrow and elongated, with parallel veins that run from the base of the leaf to its tip.

Crabs, prawns, lobsters, barnacles, wood lice and water fleas belong to the class Crustaceans as aquatic free living animals

Amoeba and hydra are both heterotrophs, meaning they consume organic material and smaller organisms. Holophytic nutrition is the same as autotrophic nutrition. Both terms refer to the process by which organisms create their own food using inorganic materials, such as water, carbon dioxide, and mineral salts, in the presence of sunlight. Symbiotic nutrition is a type of interaction between two organisms where they share shelter and nourishment, and both benefit from the relationship.

Mold is a multicellular fungus.Mold is a living organism that grows in a network of hyphae called a mycelium. The mycelium is the visible part of mold. Mold reproduces by releasing spores into the air, which can then settle in a new area.

Medulla oblongata is the bottom-most part of your brain. Its location means it's where your brain and spinal cord connect, making it a key conduit for nerve signals to and from your body. It also helps control vital processes like your heartbeat, breathing and blood pressure. The cerebellum coordinates and regulates muscle tone, balance, and posture. The cerebellum plays a role in higher-order functions, including cognitive, emotional, and reward processes. The Cerebrum is the largest part of the brain, making up about 80% of it. It's responsible for memory, intelligence, emotions, personality, and more. It is the center for intelligence, memory, and emotions. It coordinates voluntary muscle movements and helps in maintaining posture and balance. The olfactory lobe's main function is to transmit the sense of smell.

The functions of the heart are to pump blood and oxygen around the body and deliver waste products (carbon dioxide) back to the lungs to be removed. Urea is produced in the liver: Production: The liver produces urea through a series of biochemical reactions called the urea cycle. The urea cycle converts ammonia, a toxic waste product from the breakdown of amino acids, into urea, which is nontoxic and water-soluble. Transport: Urea is dissolved into the blood and transported to the kidneys. Excretion: The kidneys excrete urea in urine along with water and other waste products.

I - Albumin II - Shell III - Chalaza IV - Germinal disc The chalazae are a pair of spring-like structures that project from the equatorial region of the vitelline membrane into the albumen and are considered to act as balancers, maintaining the yolk in a steady position in the laid egg.

Germinal disc as seen in the diagram

Carbon dioxide (CO\(_2\) is the gas produced during tissue respiration. And it can be identified by bringing it close to lime water ( Calcium hydroxide), which turns the lime water solution milky.

A seedling grown in the dark will eventually die because it won't have enough energy or food to grow. Seedlings grown in the dark grow taller than seedlings grown in the light, but without much leaf development. This is because they use stored chemical energy in their cells to grow. They become etiolated(pale and drawn out due to a lack of light).

Sucrose is a dissacharide that resulted from reaction of 1 molecule of Glucose and 1molecule of fructose.However, Sucrose can be split into Glucose and fructose in the presence of an enzyme, invertase.

When yeast breaks down sugar through anaerobic respiration, it produces ethanol, carbon dioxide, and energy. This process is also known as fermentation. Yeast uses anaerobic respiration when oxygen is not available. This type of respiration is important economically because it's used to make foods like bread and alcoholic drinks.

White blood cells are also called leukocytes. They protect you against illness and disease. Think of white blood cells as your immunity cells. Platelets, or thrombocytes, are small, colourless cell fragments in our blood that form clots and stop or prevent bleeding. Platelets are made in our bone marrow, the sponge-like tissue inside our bones. Phagocytes are a type of white blood cell (leukocyte) that are part of the immune system's defense mechanism. Red blood cells (RBCs) transport oxygen from the lungs to the body's tissues. RBCs contain hemoglobin, a protein that binds to oxygen. The Red blood cells are also referred to as erythrocytes.

The veins of a leaf are formed by the vascular tissue within the leaf, which branches out from the midrib to form a network structure.