Introduction to Life Science
He proposed the theory of spontaneous generation.
A. Louis Pasteur
B. Aristotle
B. Aristotle
Which of the following animals reproduces by laying eggs?
A. Frog
B. Cat
A. Frog
Which organ system is responsible for transporting oxygen and nutrients throughout the body?
A. Nervous system
B. Digestive system
C. Circulatory system
C. Circulatory system
Which scientist proposed the theory of natural selection as the mechanism of evolution?
A. Gregor Mendel
B. Charles Darwin
C. Jean-Baptiste Lamarck
D. Carl Linnaeus
B. Charles Darwin
A rabbit population in a grassland increases rapidly due to abundant food and favorable climate. Which factor contributed most to this population growth?
A. Environmental resistance
B. Biotic potential
C. Predation
B. Biotic potential
A student mixes methane, ammonia, hydrogen, and water vapor in a laboratory experiment to simulate early Earth conditions. What concept is the student testing?
A. Biogenesis
B. Abiogenesis
B. Abiogenesis
A starfish that can grow a new arm and even form a new individual from a broken piece. What type of reproduction is this?
A. Budding
B. Regeneration
B. Regeneration
How does the respiratory system of fish differ from that of mammals?
A. Fish use gills to extract oxygen from water, while mammals use lungs to breathe air.
B. Fish have no respiratory organs, while mammals have advanced lungs.
C. Both fish and mammals use skin respiration only.
A. Fish use gills to extract oxygen from water, while mammals use lungs to breathe air.
Why is the modern classification system considered evolutionary?
A. It groups organisms based only on physical similarities.
B. It organizes species according to shared ancestry and genetic relationships.
C. It arranges organisms alphabetically to avoid confusion.
B. It organizes species according to shared ancestry and genetic relationships.
When a population of deer becomes too large, food resources become scarce, and some individuals die of starvation. What is this situation an example of?
A. Environmental resistance limiting growth
B. Mutation increasing adaptability
C. Migration improving survival
A. Environmental resistance limiting growth
Which statement best describes the relationship between structure and function in living organisms?
A. Structure and function are unrelated aspects of living things.
B. The shape and design of body parts help them perform specific functions.
C. The function of an organ determines its color and size only.
B. The shape and design of body parts help them perform specific functions.
Which reproductive strategy provides the highest chance of offspring survival?
A. Producing few offspring but providing parental protection and nourishment
B. Releasing sperm and eggs into the water randomly
A. Producing few offspring but providing parental protection and nourishment
If an animal’s circulatory system has both oxygenated and deoxygenated blood mixing in the same chamber, what can be inferred about its heart structure?
A. It has two chambers like fish.
B. It has three chambers like amphibians.
C. It has four chambers like mammals.
B. It has three chambers like amphibians.
Which situation best supports the concept of “descent with modification”?
A. Humans selectively breed dogs to produce desired traits.
C. Animals migrate to new habitats during climate change.
D. A population of fish increases after a fishing ban is enforced.
B. Different finch species on the Galápagos Islands have unique beak shapes suited to their food sources.
What does the presence of stromatolites (ancient fossilized microbial mats) suggest about early Earth?
A. Simple photosynthetic life existed billions of years ago.
B. Complex animals evolved first.
C. Life began in dry, desert environments.
A. Simple photosynthetic life existed billions of years ago.
Which of the following steps must occur first in the process of genetic engineering?
A. Inserting the DNA into the host organism
B. Identifying and isolating the gene of interest
C. Allowing the organism to express the new gene
B. Identifying and isolating the gene of interest
Which relationship best illustrates how organ systems interact in animals?
A. The nervous system controls muscle contractions for movement.
B. The respiratory system stores food for digestion.
C. The skeletal system circulates blood to all organs.
A. The nervous system controls muscle contractions for movement.
A scientist observes that birds with longer beaks survive better in areas with deep flowers than those with short beaks. Which unifying theme does this observation support?
A. Evolution through natural selection
B. Ecosystem diversity
C. Structure and function relationship
A. Evolution through natural selection
If bacteria are genetically engineered to produce insulin, what practical use does this have?
A. It provides a cheaper and safer source of insulin for diabetic patients.
B. It eliminates the need for photosynthesis in plants.
A. It provides a cheaper and safer source of insulin for diabetic patients.
If the nervous system fails to function properly, which effect would most likely occur?
A. The heart would beat faster
B. Muscles would not respond to stimuli
C. Digestion would become faster
B. Muscles would not respond to stimuli