Cell and Life
Organisms can be divided into 2 groups depending one the numeber of cell they have. The 2 groups are:
unicellular and multicellular organism.
What is the basic unit of life?
cell
Which 2 organ systems are directly related to the movement of human body?
skeletal and muscular system
How do animals gain energy？
By eating food and break them down to gain nutrients and release energy
OR
Through digestive system
Which living animal on the earth nowadays has the largest number of cells?
The blue whale
Organisms can pass on their genetic information through _________.
reproduction
List the level of organization in human.
cell-tissue-organ-system-organism
What happen to a muscle cell when it contracts?
It shorten.
Which types of digestion happen in the mouth?
Both mechanical and chemical digestions happen in the mouth.
Where can we find dead cells in plants?
In the cork/bark of the tree.
(xylem tissue is also an acceptable answer.)
_______ is the increase in the size of a caterpillar while it undergose _________ when it turns into a butterfly.
Growth; development
Which tissues are lungs made of？
muscle, connective, nervous and epithelial tissue.
List 3 functions of the skeletal system in huamn.
1. support
2. facilitate movement
3. protect internal organs
4. make new blood cells
5. store mineral and fats
...
We get the 6 different nutrients from eating a balanced diet. Name the 6 nutrients.
protein, fat, carbohydrate, mineral, vitamin and water
How do squid move quickly in the ocean?
Using jet propulsion
What are the two important steps that stem cells have to undergo to form a whole organism with many different types of cells?
cell division and cell differentiation
Which animal tissue group does blood belong to?
connective tissue
What are the 4 different types of roots that plants have for suppot and nutrient absorption?
tap, fibrous, prop and adventitious root.
Which role does saliva play in the process of digestion?
1. smooth the sallowing
2. break down starch
3. neutralize acidic food
What are the 3 principle of cell theory？
1. All organisms are made by cells
2. Cells are the basic functioning unit of life
3. All cells come from preexisting cells.
Name the 4 difference between prokaryotic and eukaryotic cells?
1. prokaryotes do not have real nucleus
2. prokaryotes have flagella and pili which allow them to move
3. prokaryotes are less complex compare to eukaryotes
4. prokaryotes are smaller compare to eukaryotes
Which tissue is the origin of the other 3 types of tissue in plants?
meristem
Which type of muscle cell has the most amount of mitochondria?
Heart muscle cell
What does 5 calories represnet?
Which process does mitochondria in cell undergoes to release energy from food molecules?
Cellular respiration