ECOLOGY
What is Denitrification?
The conversion of nitrates to nitrogen gas. It is carried out by denitrifying bacteria in the soil.
What are ribosomes?
These are very small organelles made of protein and RNA. Function is to make proteins
What is cross-pollination?
The transfer of pollen from an anther to a stigma on a different plant of the same species.
What are valves?
These control the direction of blood flow.
Where does meiosis occur in the female reproductive system?
The ovaries
What is Contest Competition?
This involves an active physical contest between 2 individuals. Eg – Robins actively defend a territory for feeding, nesting and reproduction.
What is a tissue culture?
These are cells grown on a sterile nutrient medium outside an organism
What is dormancy?
This is the resting period when seeds undergo no growth and have reduced cell activity/metabolism
What is found in the right atrium?
This chamber of the heart is where you'll find the pacemaker (SA node)
The developing embryo first develops into a.....
Morula
What is a qualitative study?
A study to find out the type(s) of organism that exist in an ecosystem
What is active transport?
This is the movement of a substance (usually ions) from its area of lower concentration to its area of higher concentration. (Opposite of diffusion)
What is the name of the female parts of the flower?
The carpel
What are Lymphocytes?
These are formed in the bone marrow and matured in the lymph nodes. They recognise proteins (antigens) on the cell membranes of invading organisms and respond by making antibodies which kill the invaders
Where do sperm cells mature?
Epididymis
What are adaptations?
The ways in which organisms are specialised either in structure/behavior to survive competition.
What is a hypertonic solution?
This has a higher concentration of solutes and thus a lower concentration of water than another solution.
What is geotropism?
The growth of plants in response to gravity.
What are monocytes?
These are phagocytic. They engulf/destroy infection.
The mother's blood passes to the embryo via the ....
Placenta
What is a Niche?
The functional role of an organism in an ecosystem. Eg – How it feeds, what it eats, who eats it etc.
What is the definition of metabolism?
Sum of all chemical reactions in the body
What is vegetative propagation?
Asexual reproduction in plants. Eg – Strawberry
What is the name given to the rhythmic expansion of the arteries?
Pulse
What is the name of the germ layer that forms the circulatory, skeletal and muscular organ systems?
Mesoderm