Which of the following is a characteristic of spirogyra, housefly larva, fish body shape, and BMI calculation?

Fresh day Apande, let's solve. 1. In which structure of the spirogyra is food stored? The pyrenoid is a specialized structure within the chloroplasts of Spirogyra where starch, the stored food, is synthesized and accumulated. B Pyrenoid 2. If a lake is polluted by untreated sewage, it would tend to have: Untreated sewage introduces a high concentration of nutrients (like nitrates and phosphates) into the lake. These nutrients act as fertilizer, causing an excessive growth of algae, a phenomenon known as eutrophication or algal bloom. A More algae. 3. The larval form of a housefly is called: The larval stage of a housefly is commonly known as a maggot. C Maggot 4. The streamline body of the fish enables it to: A streamline body shape reduces friction and drag as the fish moves through water, allowing for efficient and easy movement. D Reduce water resistance during movement. 5. A man of 30 years is 170 cm tall and has a weight of 88 kg, what is his BMI status? Step 1: Convert height to meters. 170 cm = 1.70 m Step 2: Calculate Body Mass Index (BMI) using the formula: BMI = weight (kg)height (m)^2 BMI = (88)/((1.70)^2) BMI = (88)/(2.89) BMI ≈ 30.45 Step 3: Determine the BMI status. • Underweight: less than 18.5 • Normal weight: 18.5 - 24.9 • Overweight: 25.0 - 29.9 • Obese: 30.0 or greater A BMI of 30.45 falls into the obese category. D Obese 6. During gaseous exchange in humans, oxygen moves into the lungs as a result of: During inhalation, the diaphragm contracts and flattens, and the intercostal muscles contract, pulling the rib cage upwards and outwards. This increases the volume of the thoracic cavity, which in turn decreases the pressure inside the lungs (intra-pulmonary pressure) below atmospheric pressure, causing air (and thus oxygen) to rush in. C Increase in thoracic volume and decrease in thoracic pressure. 7. A fall in the blood level of this hormone during pregnancy will lead to miscarriage: Progesterone is a vital hormone during pregnancy. It helps maintain the uterine lining, prevents uterine contractions, and supports the developing embryo. A significant drop in progesterone levels can lead to the breakdown of the uterine lining and subsequent miscarriage. A Progesterone 8. Which letters represent the sebaceous gland and sweat gland respectively? In the diagram of the mammalian skin: • D points to the sebaceous gland, which is typically associated with a hair follicle and produces oil (sebum). • B points to the coiled structure of a sweat gland, which produces sweat and has a duct leading to the skin surface. C Part D and B 9. An endocrine gland in the human body that produces a hormone which increases the rate of heart beat. The adrenal glands produce hormones like adrenaline (epinephrine) and noradrenaline (norepinephrine). These hormones are released in response to stress and directly increase heart rate, blood pressure, and prepare the body for a "fight or flight" response. C Adrenal gland 10. Reabsorption of glucose and amino acids occurs in the kidney nephron at The proximal convoluted tubule (PCT) is the primary site in the nephron where essential substances like glucose, amino acids, vitamins, and a large percentage of water and salts are reabsorbed back into the bloodstream. D Proximal convoluted tubule. 11. Below is the diagram of the eye. Which structure regulates the amount of light entering the eye? In the diagram of the eye: • X points to the iris. The iris is the colored part of the eye that surrounds the pupil. It contains muscles that contract or relax to change the size of the pupil, thereby controlling how much light enters the eye. B X 12. The diagram below represents the circulation of carbon in nature. The question is incomplete as the diagram and options are cut off. I cannot provide an answer without the full question. Send me the next one 📸