Topic 4.1 - Species, communities, and ecosystems
Group of organisms that can potentially interbreed to produce fertile offspring
What is species?
The cells that have been evolutionary designed to transmit electrical impulses.
What is neurons?
Plant reproduction success depend on
What is pollination, fertilization, and seed dispersion ?
A group of organisms of same species, living in same area at same time.
What is a population?
The time period which an area of a neuron is ready to send an action potential, but is not actually sending one.
What is resting potential?
How can pollen be transferred?
Through water and through other animals
Organisms which synthesize organic molecules from inorganic sources.
What is an autotrophy?
Chemical messengers released from neurons and function to transmit signals across the synaptic cleft
What is neurotransmitters?
the female part of the flower is called the pistil. what is it composed of?
the stigma, style, and ovule>
What are Detritivores?
The main purpose of the myelin sheath.
What is to increase the speed of electrical transmissions via saltatory conduction?
what are phytochromes?
leaf pigments which are used by the plant to detect periods of light and darkness
If two species tend to occur within the same habitat what is it?
What shows negative association?
Ion channels open and cause a change in membrane potential
What is depolarization?
what is the difference between active and inactive phytochromes?
The inactive form of phytochrome (Pr) is converted into the active form when it absorbs red light (~660 nm). Meanwhile, the active form of phytochrome (Pfr) is broken down into the inactive form when it absorbs far red light (~725 nm)