Signs of Life
A sunflower slowly turns toward sunlight during the day. Which characteristic of living things is it showing?
Responding to stimuli
Which cell structure performs photosynthesis?
Chloroplast
What do we call a group of similar cells working together to perform a specific job?
Tissue
What type of cell division produces two body cells?
Mitosis
What are the daughter cells produced through meiosis called?
Gametes
A tiny organism consists of only one cell. What type of organism is it?
Unicellular Organism
I am the part of a cell that contains the organism's DNA. What am I?
Nucleus
What type of cell can divide and become different kinds of specialized cells?
Stem cell
What is the name for the division of the cell's cytoplasm?
Cytokinesis
Which process produces four cells from one original cell?
Meiosis
A puppy becomes larger and changes as it becomes an adult dog. Which characteristic of life does this demonstrate?
Growth and Development
A plant has not received enough water and begins to wilt. What has the plant lost?
Turgor pressure
Put these in order from simplest to most complex: organ, cell, organ system, tissue.
Cell → Tissue → Organ → Organ system
During mitosis, duplicated chromosomes are pulled toward opposite sides of the cell. Which phase is occurring?
Anaphase
A body cell has 70 chromosomes. How many chromosomes should each gamete contain?
35 chromosomes
Why must organisms obtain resources such as water and energy?
They need resources to survive / carry out activities inside their cells.
Two cells are observed. Cell A has a very large vacuole, while Cell B has a much smaller one. Which is most likely the plant cell?
Cell A
The stomach contains several different kinds of tissues working together. What level of organization is the stomach?
Organ
One body cell undergoes mitosis. How many daughter cells should be produced?
Two
A sperm cell containing 35 chromosomes joins an egg cell containing 35 chromosomes. How many chromosomes will the fertilized cell have?
70 chromosomes
A robot can move and respond when someone touches it. Why isn't this alone enough to prove that the robot is alive?
Living things must show the characteristics of life, such as being made of cells, growing/developing, reproducing, using resources, and responding to stimuli.
A cell needs to control which materials can enter and leave it. Which structure performs this job?
Cell membrane
Explain the difference between an organ and an organ system.
An organ is made of different tissues working together; an organ system is made of organs working together.
A cut on your skin eventually heals as new body cells are produced. Which process makes the new body cells possible? Explain.
Mitosis, because mitosis produces new body cells.
Explain how both meiosis and mitosis are involved in producing and developing a new organism.
Meiosis produces the gametes that join to make a new cell. The new cell then undergoes mitosis as the organism develops.