Science Life Science Flashcards
6 cards from real GED practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Science Life Science flashcards as text
Which type of blood vessel carries oxygenated blood AWAY from the heart to body tissues?
Answer: Arteries
Arteries carry oxygenated blood away from the heart. Veins return deoxygenated blood back to the heart (except pulmonary vessels, which are reversed).
What is the role of the kidneys in the human body?
Answer: Filter blood and remove waste as urine
The kidneys filter blood to remove metabolic waste products (like urea) and excess water, producing urine. They also regulate blood pressure and electrolyte balance.
Which process occurs during mitosis that ensures each daughter cell receives a complete set of chromosomes?
Answer: DNA replication before cell division
Before mitosis begins, DNA replication duplicates all chromosomes so each daughter cell receives an identical, complete set of genetic information.
What is the primary function of red blood cells (erythrocytes)?
Answer: Transport oxygen from the lungs to body tissues
Red blood cells contain hemoglobin, a protein that binds to oxygen in the lungs and releases it to tissues throughout the body.
Which of the following is an example of a mutualistic relationship between two organisms?
Answer: Bees pollinating flowers while collecting nectar
In mutualism, both organisms benefit. Bees get nectar (food) while flowers get pollinated (reproduction). Both benefit from the relationship.
A gene has two forms: a dominant allele (T) for tall plants and a recessive allele (t) for short plants. What is the phenotype of a plant with genotype Tt?
Answer: Tall
A dominant allele (T) masks the recessive allele (t). A plant with genotype Tt will express the dominant phenotype and be TALL.