B1: Specialised Cells and Unicellular Organisms Flashcards
How is a nerve cell adapted to carry out its function (job)?
It is long and thin so can send messages all over the body.
It has connecitons at each end to connect with other nerve cells.
State 3 ways a sperm cell is adapted to carry out its function (job)?
They have a streamlined shape, to help them swim.
They contain mitochondria to give energy to their tail.
They have a tail for movement.
They have a pointed head that can burrow into the egg.
How is a root hair cell adapted to carry out its function (job)?
It has a long, thin root hair which creates a large surface area for absorbing water and nutrients.
What is a specialised cell?
A cell that is adapted (has special features).
So that it can carry out a specific function (job).
What is the funciton of the fat stores in a human egg cell?
To provide energy for the developing embryo (early form of a baby)
What is the red pigment in red blood cells called that allows the cell to carry oxygen?
Haemoglobin
How is a leaf cell adapted to carry out its function (job)?
It has a big surface to capture sunlight.
It contains many chloroplasts which carry out photosynthesis.
What is the funciton of a root hair cell?
To help plants absorb nutrients and water from soil.
Why do root hair cells not have chloroplasts like most plant cells?
Because they are underground - no light for them to carry out photosynthesis.
What is the function of a leaf (palisade) cell?
To carry out photosynthesis and make food for the plant.
Give 2 examples of unicellular organisms.
Amoeba
Euglena
Bacteria
What is the name of the process by which euglena and amoebas reproduce?
BINARY FISSION
How is the euglena adapted to get its energy?
It has chloroplasts to do photosynthesis
It has an eye spot to detect light
It has a flagellum to move towards light.
Identify the part(s) of a Euglena which are found in plant cells.
Chloroplasts, (vacuole)
What is a unicellular organism?
An organism that is made from just one cell
