Answer:
every muscle cell of the motor unit is stimulated to contract.
Explanation:
Stimulus in biology can be defined as an obvious change in either the chemical or physical structure of an organism' environment (either external or internal). Thus, all living organisms (both animals and plants) respond to changes in their environment and consequently, an appropriate response or reaction is made. Also, stimulus arising from within the organism is known as internal stimulus while those from its environment are known as the external stimulus.
In organisms, the specialized cells that detect stimulus are generally known as sensory receptors while a group of these receptors is referred to as sense organ. Therefore, the senses are necessary for behavior because stimuli must be sensed in order to respond.
Stimulus control can be defined as a phenomenon that arises when a living organism responds or behaves in the presence of a stimulus and in another way in the absence of a stimulus.
For example, opening the door of a microwave oven as soon as its timer beeps.
Example II; When your body touches a hot object, you quickly move away and feel some pain subsequently.
Action potentials generates the nerve impulse in a motor neuron.
When an action potential is generated within a motor neuron, every muscle cell of the motor unit is stimulated to contract.
The right answer is both simple and complex transposons.
A transposable element, sometimes called a transposon, is a DNA sequence capable of moving autonomously in a genome by a mechanism called transposition.
Transposase is an important and specific element of every transposon, whether it is simple or complex transposons, or it has a copy-and-paste or a cut-and-paste transposition mechanism,
Answer:
the answer is false
Explanation:
The order from inside to outside is Photosphere Chomosphere and Corona
The best and most correct answer among the choices provided by the question is the second choice. The statement "<span>Organisms living today do not share ancestry with older, simpler life-forms." is False. </span>I hope my answer has come to your help. God bless and have a nice day ahead!
Answer:
<h2>
Tetracycline affects the binding of tRNA to the ribosome.
</h2><h2>
Chloraamphenicol affect: growth of the protein chain.</h2>
Explanation:
1. Antibiotics block protein synthesis mostly in prokaryotes only as prokaryotes contain 70s ribosome.
2. Antibiotics are of various types, which have different targets in protein synthesis, some works on small sub-unit of ribosome and some on large sub-unit.
⇒Tetracycline would directly affect binding of tRNA to the A site on ribosome. tRNA brings amino acid to the ribosome which pairs with codon on mRNA.
⇒ Chloraamphenicol would directly affect growth of the protein chain because it block peptidyl transfer so the elongation of protein terminates.
