Science: Final Exam (7th)

What is the basic unit of life in all living organisms? ¿Cuál es la unidad básica de la vida en todos los organismos vivos?

• A) Atom
• B) Molecule
• C) Cell
• D) Tissue

Which organ system is primarily responsible for transporting nutrients and oxygen throughout the body? ¿Qué sistema de órganos es el principal responsable de transportar nutrientes y oxígeno por todo el cuerpo?

• A) Digestive system
• B) Nervous system
• C) Circulatory system
• D) Respiratory system

Which statement best describes the relationship between cells, tissues, and organs? ¿Qué afirmación describe mejor la relación entre células, tejidos y órganos?

• A) Tissues are made up of organs, which are made up of cells.
• B) Organs are made up of tissues, which are made up of cells.
• C) Cells are made up of tissues, which are made up of organs.
• D) Organs are made up of cells, which are made up of tissues.

Which structure in a plant cell is not found in animal cells? ¿Qué estructura de una célula vegetal no se encuentra en las células animales?

• A) Mitochondria
• B) Nucleus
• C) Cell wall
• D) Cytoplasm

Which of the following materials is transparent? ¿Cuál de los siguientes materiales es transparente?

• A) Wood
• B) Frosted glass
• C) Clear glass
• D) Aluminum foil

What happens to light when it passes from air into water at an angle? ¿Qué le sucede a la luz cuando pasa del aire al agua en ángulo?

• A) It reflects completely.
• B) It speeds up.
• C) It bends or refracts.
• D) It disappears.

Which color of light has the shortest wavelength? ¿Qué color de luz tiene la longitud de onda más corta?

• A) Red
• B) Green
• C) Blue
• D) Violet

Why does a red apple appear red? ¿Por qué una manzana roja parece roja?

• A) It absorbs red light and reflects all others
• B) It reflects red light and absorbs other colors
• C) It emits red light from within
• D) It blocks all colors of light

What is the primary purpose of cellular respiration? ¿Cuál es el propósito principal de la respiración celular?

• A) To produce oxygen
• B) To convert glucose into energy
• C) To store genetic information
• D) To break down DNA

Which organelle is known as the powerhouse of the cell? ¿Qué orgánulo se conoce como la central energética de la célula?

• A) Nucleus
• B) Ribosome
• C) Mitochondria
• D) Chloroplast