Free AFCT General Science: Life and Biological Questions and Answers 1 — Questions and Answers
Question 1: What is the primary product of photosynthesis that plants use for energy?
- Oxygen
- Glucose (Correct answer)
- Carbon Dioxide
- Water
Correct answer: Glucose
Photosynthesis uses sunlight, water, and carbon dioxide to create glucose, which is a sugar that provides chemical energy for the plant's metabolic processes. Oxygen is released as a byproduct of this reaction, not used as the primary energy source by the plant.
Question 2: Which organelle is known as the 'powerhouse' of the cell because it generates most of the cell's supply of adenosine triphosphate (ATP)?
- Nucleus
- Ribosome
- Mitochondrion (Correct answer)
- Cell Membrane
Correct answer: Mitochondrion
The mitochondrion is responsible for cellular respiration, a process that converts nutrients like glucose into ATP, the main energy currency of the cell. The nucleus contains the cell's genetic material, and ribosomes are responsible for protein synthesis.
Question 3: What is the term for the observable physical characteristics of an organism?
- Genotype
- Phenotype (Correct answer)
- Allele
- Chromosome
Correct answer: Phenotype
The phenotype refers to the observable traits of an organism, such as hair color, eye color, and height, which result from the interaction of its genetic makeup (genotype) and the environment. The genotype is the set of genes in an organism's DNA.
Question 4: Which part of the human circulatory system is responsible for pumping oxygenated blood to the rest of the body?
- Right Atrium
- Right Ventricle
- Left Atrium
- Left Ventricle (Correct answer)
Correct answer: Left Ventricle
The left ventricle is the strongest chamber of the heart, and its powerful contractions pump oxygen-rich blood through the aorta to all parts of the body. The right ventricle pumps deoxygenated blood to the lungs, while the atria are receiving chambers.
Question 5: In a food chain, which trophic level consists of organisms that produce their own food?
- Primary Consumers
- Secondary Consumers
- Decomposers
- Producers (Correct answer)
Correct answer: Producers
Producers, such as plants and algae, form the base of the food chain by creating their own food from inorganic sources like sunlight through photosynthesis. Primary consumers (herbivores) eat producers, and secondary consumers (carnivores or omnivores) eat primary consumers.
Question 6: What is the correct order of the major taxonomic ranks from most inclusive to least inclusive?
- Kingdom, Phylum, Class, Order, Family, Genus, Species (Correct answer)
- Kingdom, Class, Phylum, Order, Family, Genus, Species
- Species, Genus, Family, Order, Class, Phylum, Kingdom
- Phylum, Kingdom, Class, Family, Order, Genus, Species
Correct answer: Kingdom, Phylum, Class, Order, Family, Genus, Species
The Linnaean system of classification organizes living things into a hierarchy of ranks. The correct sequence from the broadest category (most inclusive) to the most specific (least inclusive) is Kingdom, Phylum, Class, Order, Family, Genus, and Species.
Free AFCT General Science: Life and Biological Questions and Answers 1
What is the primary product of photosynthesis that plants use for energy?