Activities of Living Things
What is the main function of chloroplasts in a plant cell?
They produce proteins.
They store water and food.
They perform photosynthesis.
They protect cells from the surrounding environment
C. They perform photosynthesis.
Different types of living things have different levels of organization. What represents the highest level of organization in any living thing?
a cell
a tissue
an organ
an organism
an organism
HOMEOSTASIS IS THE MAINTENANCE OF A STABLE ___ ENVIRONMENT.
Internal
Which direction does water flow? (In terms of concentration)
From high to low concentration
MATERIALS MOVE INTO AND OUT OF THE CELL THROUGH THE ___ ___.
Cell Membrane
Many animals have skeletons that provide support so that they can remain upright. In contrast, plants cells depend on a cellular structure for support. What structure provides support for a plant cell?
nucleus
cell wall
chloroplast
cell membrane
B. cell wall
Within the body there are simple structures that work together to form more complex structures.
Which choice below sequences body structures from the simplest to the most complex?
systems make up tissues > tissues make up organs > organs make up cells
organs make up systems > tissues make up organs > cells make up tissues
cells make up tissues > tissues make up organs > organs make up systems
cells make up tissues > organs make up cells > systems make up organs
C.cells make up tissues > tissues make up organs > organs make up systems
Which of the following are ways organisms try to maintain homeostasis?
Reptiles laying in the sun to stay warm.
Hibernating during extremely cold weather.
Some trees loosing leaves to reduce water loss.
All of these.
All of these above
THE MOVEMENT OF MOLECULES FROM HIGH CONCENTRATION TO LOW CONCENTRATION.
Diffusion
The powerhouse of the cell is the...It converts energy from food into energy the cell can use
Mitochondrion
Golgi body
Nucleus
Ribosomes
Mitochondrion
Which one of these is NOT one of the characteristics of living things?
All living things drink water.
All living things are composed of one or more cells.
All living things grow develop and have life spans.
All living things reproduce.
All living things drink water.
The brain is a structure that controls and coordinates the activities of an organism. Which of the following best represents the levels of organization that forms the brain?
organism > organ system > organ > molecules > atoms
tissues > cells > atoms > organ > organ system
molecules > organ > tissues > cells > organism
atoms > molecules > cells > tissues > organ
atoms > molecules > cells > tissues > organ
Cells must maintain homeostasis to survive. To do this, cells use various processes. One process keeps the right amount of water inside the cell. Which statement describes a cell that is maintaining homeostasis by keeping its water concentration stable?
A cell is gaining more water than it loses.
A cell takes in the same amount of water as it loses.
A cell loses all its water to its surrounding environment.
A cell first takes in water gradually and then more rapidly
B. A cell takes in the same amount of water as it loses.
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of ___________.
osmosis
equilibrium
diffusion
hypertonic
equilibrium
The following equation illustrates the chemical reaction that occurs in a plant.
water + carbon dioxide + light energy à sugar + oxygen
Based on the law of conservation of energy, what happened to the light energy in the reaction?
It was converted into chemical energy stored in the sugar.
It was produced by the plant.
It was changed into oxygen gas.
It was destroyed.
It was converted into chemical energy stored in the sugar.
Living things do all the following EXCEPT:
Respond to stimulus
Grow and develop
Maintain homeostasis
They do not change
They do not change
Which of the following is something that all living organisms have in common?
They all contain at least one cell.
They all need a source of oxygen.
They all use other organisms for food.
They all find mates to reproduce.
A. They all contain at least one cell.
Homeostasis helps stabilize internal body conditions.
What would not be an example of homeostasis maintaining body conditions?
shivering when the body is cold
the immune system attacking a cold virus
getting a haircut to stay cool in hot weather
sweating during physical activity
C.getting a haircut to stay cool in hot weather
How do the particles move in diffusion?
From a region of low concentration to a region of high concentration
From a region of high concentration to a region of low concentration
From a region of low concentration to a region of low concentration
From a region of high concentration to a region of high concentration
From a region of high concentration to a region of low concentration
If the environment gets cold, we will often shiver in order to:
keep body temperature the same as the external temperature
decrease body temperature
increase body temperature
regulate blood pressure
increase body temperature
How are single-celled organisms and multi-celled organisms similar?
Both need food for energy and growth.
Both have skeletal system for support.
Both require the interactions of many cells to survive.
Both are able to carry out all life functions in only one cell.
Both need food for energy and growth
Animals urinating, bacteria releasing toxins through their cell membranes, and a dog pooping are all examples of what characteristic of living things?
growing and reproducing
responding to stimuli
eliminating wastes
requiring nutrients or a source of energy
eliminating waste
The cell membrane constantly moves materials into and out of the cell to help the cell maintain homeostasis. Which word is best used to describe what happens as a result of homeostasis?
growth
change
stability
reproduction
stability
Which of these do not require energy?
passive energy
osmosis
active energy
gravity
passive energy
How does a cell maintain homeostasis?
Regulates what enters and leaves the cell
Flexibility
Protective barrier
Structure and support
Regulates what enters and leaves the cell