What processes would you consider essential for maintaining life?
The sustaining of life depends on processes such as digestion, respiration, excretion, circulation, and transportation.
Life Processes
What are outside raw materials used for by an organism?
Organisms utilise the outside raw material as a source of food and oxygen. The amount of raw resources needed depends on how complicated the organism is and where it is living.
What criteria do we use to decide whether something is alive?
It is possible to tell whether something is alive or dead by observing its walking, breathing, growth, and other apparent changes. To determine whether something is alive, the existence of the life process is a key requirement because some living objects will undergo changes that are invisible to the human eye.
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
Humans and other multicellular organisms need a lot of oxygen to diffuse fast into their enormous bodies in order to meet their oxygen needs. The slow process of diffusion means that it will take a long time for oxygen to reach all of the body\’s cells. Diffusion is too slow to supply enough oxygen to …
Q. What is meant by ‘grafting’ as a means of propagation in plants?
Solution : Grafting is a technique for artificially propagating plants that involves severing the stems of two plants, one of which has roots and the other does not. Then, these stems are connected to create a single plant.
Q. Define Grafting ?
Solution : Grafting is the technique of fusing two plants so they develop into a single entity. It entails planting a bud inside, on top of, or within another plant’s stem, roots, or leaves. The stock is the component that supplies the root, and the scion is the component that is attached. Most fruit trees …
Tissue culture ( Micro -propagation )
Tissue culture Definition : “Tissue culture is the technique of growing cells and tissues in an artificial medium separate from the organism.” What is Tissue Culture? Plant fragments can be cultivated in a lab using the technique known as tissue culture. The use of the organs for tissue culture occurs often. Broth and agar are …
What is Neuromuscular junction ?
Solution: The terminal end of a motor nerve and a muscle (skeletal, smooth, or cardiac) form the neuromuscular junction (NMJ), which is a synaptic connection. It is the location where the action potential is sent from the nerve to the muscle.
Q. Where does communication occur between neurons?
SOLUTION : Synapse: The connection between a neuron’s axon and dendrite at which two neurons exchange information.Electrical and chemical signals are the primary means of communication between neurons. An action potential is triggered by the stimulation of a nerve cell. This results in the creation of an electrical current that passes through the synaptic cleft …
Q. Where does communication occur between neurons? Read More »
Q. Describe the double circulation of blood in human beings. Why is it necessary?
Solution : The heart receives impure blood (deoxygenated blood) from different parts of the body, and it pumps this blood to the lungs. The oxygenated blood or , pure blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice …
Q. Describe the double circulation of blood in human beings. Why is it necessary? Read More »