Chemicals of Life
What is the most common and plentiful chemical found in all living cells?
Water
Why do all living things need space?
To be able to grow and find resources.
What is spontaneous generation?
The mistaken idea that nonliving things can produce living things.
What is the smallest unit of life called?
a cell
What is a stimulus?
Anything in the environment that can cause a reaction or response by an organism.
What is Nucleic Acid?
A chemical that forms instructions and blue prints for cells to follow in order to function properly.
What are all of the needs of living things?
Food, water, space and homeostasis
Who was the first scientist to disprove spontaneous generation?
Francesco Redi
Why is fire not alive?
It isn't made of cells
What are the 5 ways humans take in stimuli?
Hearing, Seeing, Feeling, Tasting, Smelling
What are the 5 chemicals of life found in all living things?
carbohydrates, water, protein, lipids, nucleic acid
Why is water the most important need?
Without water chemicals can't be dissolved and transported through organisms bodies to be delivered to cells.
Who was the 2nd scientist to prove that spontanious generation wasn't real?
Louis Pasteur
What are all of the characteristics that living things share? (These are required for something to be considered living.)
All organisms are made of cells.
All organisms contain similar chemicals and use energy.
All organisms respond to their surroundings.
All organisms grow, develop, and reproduce.
Give two examples of how your senses could save your life.
Answers will vary.
To make energy.
What is homeostasis?
Describe Redi's experiment and how it disproved spontaneous generation.
Answers will vary
Is a seed alive? Explain you answer.
Yes (Answers will vary)
What is an autotroph and what is the other name that it can be called?
An organism that feeds itself by making its own food from the sun's energy. It can also be called a producer.
What are protein and lipids used by cells to do?
Build and repair cells.
What are three ways your body maintains homeostasis?
Answers will vary.
What are 2 major ways that Pasteur changed and improved the world as we know it?
Hand washing and sterilization in hospitals
Food preservation
All living things can grow and develop.What is the difference between the two?
Growth means getting bigger. Developing means maturing to move through phases of an organisms life cycle.
Every living thing must reproduce or its species will become extinct. What are the two ways organisms can reproduce and what do they each mean?
Asexual-One parent produces genetically identical offspring.
Sexual-Two parents combine DNA to create genetically unique offspring.