<span>18.) Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point. Thus option B is the correct answer. 19) Nicolas Copernicus developed the heliocentric model in the 16th century, which led to the believe that the sun is the center of the Universe, with the planets (including Earth) and stars orbiting it. 20.) A gas giant is a large planet composed mostly of gases, such as hydrogen and helium, with a relatively small rocky core. The gas giants of our solar system are Jupiter, Saturn, Uranus and Neptune.</span>
Answer:
the bacterial cell will die since it cannot replicate or transcribe its DNA
Explanation:
DNA is a double stranded molecule that stores genetic information in living cells. However, the DNA needs to be replicated before cell division and also transcribed in order to be expressed.
As stated in this question, DNA helicase is an important enzyme in the replication and transcription of DNA because it is the enzyme responsible for separating the double stranded DNA into single strands before they can be replicated or transcribed.
According to this question, fluoroquinolones such as ciprofloxacin, are synthetic drugs that interfere with the action of DNA helicases in a cell. This means that a cell affected by this synthetic drug will be unable to separate it's DNA and hence, will die since it cannot replicate or transcribe its DNA.
Answer:
A. Less producers
Explanation:
Producers/plants are usually in abundance around ponds, rivers and other sources of water.
Take away any of the essentials: Sun, nutrients, water and the flora/plant life will regress to just a few species that can survive harsh conditions.
Inhibitory postsynaptic potentials differ from excitatory postsynaptic potentials most significantly in their direction of membrane polarization.
<h3>Electrical propagation in neurons</h3>
Neurons are the basic unit of the nervous system. it's transmits electrical impulses from one cell to another in form of action potentials.
The temporal change in the electric polarization of the membrane of a nerve cell (neuron) is called postsynaptic potentials. There are two types which include:
- Inhibitory postsynaptic potentials: the charge across the membrane is further from the firing threshold.
- Excitatory postsynaptic potentials: the charge across the membrane is nearer to the firing threshold.
Therefore, Inhibitory postsynaptic potentials differ from excitatory postsynaptic potentials most significantly in their direction of membrane polarization.
Learn more about nerve cells here:
brainly.com/question/837202
If it is the fill in the blanks.The answer is The circles,or orbits,for electrons are called energy levels.