Lucture 1 Flashcards
What is life science ?
It is the scientific study of living things .
How many species on earth?
More than 10 million, range in size from microscopic bacteria to blue whales
How can we decide if something is living or not?
By the 7 life processes
How do plants moves?
rooted and move slowly as they grow
A. Their roots move down into the soil and
B.their stems move up towards the light
How do animals move?
a. move quickly and can move their entire bodies
b. Move in search of food, shelter or to avoid danger.
What is respiration?
Process involves taking in oxygen (of air) into the cells
Respiration in plants and animals?
Provide energy for carrying out all the life processes
Which are necessary to keep the living thing alive.
What is cellular respiration?
Respiration which releases energy, takes place inside the cells of the body d
What is sensitivity?
The ability to detect changes in the surrounding environment.
Sensitivity in plants ?
A)they respond to the light by moving their leaves towards it
B) the flowers of some plants open in the morning and close at the night when it is dark.
C) some plants respond quickly to touch suchas: touch me not plants (mimosa pudica)and
Venus flytrap.
Growth in animals?
Animals stop growing once they reach adulthood
Growth in plants?
Plants continue growing throughout their lives
If animals stop growing once they reach adulthood does that mean that the materials within on animal’s body stop growing?
No they are still being replaced.
What is excretion?
It is the process of getting rid of metabolic waste.
Where plants store waste substances?
In the leaves
When the waste is removed in plants?
When their leaves fall off
How plants produce waste products?
In the form of two gases carbon dioxide and oxygen.
Carbon dioxide during respiration
Oxygen during photosynthesis
How can plants excrete oxygen and Carbon dioxide?
Through a structure called ** stomata **
How can animals get rid of waste?
1) breath out waste carbon dioxide
2)other waste substances leave the body as urine, sweat, tears.
Sensitivity in animals?
Animals respond quickly to stimuli such as heat, sound, touch and Chemicals.
What is reproduction?
ability to produce copies of itself- important for the continuity of life.
What is the importance of reproduction?
Important for the continuity of life and formation of new generations
How reproduction goes for plants?
They produce seeds that give rise to new plants of the same species.
How reproduction goes for animals?
They lay eggs or have babies.
