Living environment regents Flashcards
(27 cards)
What is the basic unit of life?
The cell.
True or False: All living organisms are made up of cells.
True.
Fill in the blank: The process by which organisms maintain a stable internal environment is called ___.
homeostasis.
What is the function of the mitochondria?
To produce energy (ATP) through cellular respiration.
Multiple Choice: Which of the following is NOT a characteristic of living things? A) Growth B) Reproduction C) Inability to adapt D) Response to stimuli
C) Inability to adapt.
What are the four main macromolecules essential for life?
Carbohydrates, lipids, proteins, and nucleic acids.
True or False: DNA is the molecule that carries genetic information.
True.
Fill in the blank: The process of converting DNA into RNA is called ___.
transcription.
What is natural selection?
The process where organisms better adapted to their environment tend to survive and produce more offspring.
Multiple Choice: Which part of the cell is responsible for controlling what enters and leaves the cell? A) Nucleus B) Cell membrane C) Cytoplasm D) Ribosome
B) Cell membrane.
What is the primary purpose of photosynthesis?
To convert solar energy into chemical energy (glucose).
True or False: All cells have a nucleus.
False.
Fill in the blank: The sequence of amino acids in a protein determines its ___.
structure and function.
What is the role of enzymes in biological reactions?
To speed up the reactions by lowering the activation energy.
Multiple Choice: Which of the following is a prokaryotic organism? A) Plant B) Animal C) Bacterium D) Fungus
C) Bacterium.
What is the function of ribosomes?
To synthesize proteins.
True or False: Genetic variation is important for the survival of a species.
True.
Fill in the blank: The part of the plant responsible for photosynthesis is called ___.
the leaf.
What is an ecosystem?
A community of living organisms interacting with their environment.
Multiple Choice: Which process do plants use to convert carbon dioxide and water into glucose? A) Respiration B) Photosynthesis C) Fermentation D) Digestion
B) Photosynthesis.
What is the function of chlorophyll?
To absorb light energy for photosynthesis.
True or False: The human body maintains homeostasis through feedback mechanisms.
True.
Fill in the blank: The process by which cells divide to form two identical daughter cells is called ___.
mitosis.
What is the difference between a food chain and a food web?
A food chain shows a linear sequence of energy flow, while a food web shows interconnected food chains.
