Answer:
<u><em>All of the options are correct. </em></u>
Explanation:
In ecology, competition can be described as a fight between two organisms for limited resources like water, food shelter etc. Competition might occur in organisms from different species or it might occur in organisms of the same population.
Let's consider an area where the population of females is lesser as compared to males. In this area, the males will compete for mating with the females.
If there is limited space, birds of an area will compete for nesting sites.
In an area where the population is more than the carrying capacity, the organisms will compete for food.
Answer:
The main difference between plankton and nekton is that plankton are passive swimmers that are carried by the water currents whereas nekton are actively-swimming organisms that swim against the water currents.
Explanation:
<span>Stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release</span>. Acetylcholine is released if the synapse happens in the sympathetic ganglion, if the synapse is in post-ganglionic neuron, norepinephrine is released.
Answer:
Sensory receptor interact with stimuli, such as light sound temperature and pain which is transformed into the code that is carried to the brain by the chain of neurons. Once the signal reaches he end of an axon, which is at the end of neuron, a neurotransmitter is released and the process repeats.
Answer:
Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
The oceans, and other bodies of water, absorb some carbon from the atmosphere. The carbon is dissolved into the water.
