Answer: D. Jacob and Monod
Explanation:
An operon is a region of DNA that consists of a single gene regulated by more than one promoter. An operon is a region of RNA that consists of the coding regions of more than one gene. RNA polymerase is the enzyme that binds to promoters and transcribes the coding regions of genes into RNA.
Jacques Monod was the first to demonstrate the preference for certain substrates over others through his studies of E. coli’s growth when cultured in the presence of two different substrates simultaneously.
The serotonin binds to a G-protein -coupled receptor and activates a G-subunit . This results in activation of PKA and closing of the potassium channels. This will subsequently decrease the influx of potassium ions into the cell, and lead to depolarization of the cell. This changes the membrane potential of the cell.
Aplysia are sea slugs which fall under the category of mollusks. Serotonin is a hormone which is responsible for the transfer of electrical signals from the brain to different parts. In this particular mollusk, serotonin was studied to find that it is an essential neurotransmitter that is responsible for the maintenance of synaptic plasticity in the neurons. Synaptic plasticity is the feature which is essential for the communication of neurons. This is the modification which occurs at the synapses during the transmission of synapses. Without this activity, the transmission of signals would be impossible.
Learn more about depolarization here-
brainly.com/question/8438145
#SPJ4
Answer and Explanation:
When metals lose electrons through oxidation, they form positively charged cations.
Li → Li+ + H+
2Ba → Ba2+ + H+
2Cu → Cu2+ + H+
Answer:
C: If crossed with another heterozygous plant, the majority of progeny will have the dominant flower color.
Explanation:
Assuming the gene is represented an allele A, purple colour can be AA or Aa while white colour will be aa.
If a heterozygous plant Aa is crossed with another heterozygous Aa, the genotype of the progeny will be AA, Aa, Aa and aa.
Since allele A is dominant over a, it thus means that the phenotype of the progeny will be 3 purple and 1 white flowered plant.
<em>Hence, the majority of the progeny will have the dominant (75%) flower colour.</em>
The correct option is C.
Answer:
According to the population growth graph, what can be determined about the population is that the carry capacity is around 0.4 million.
Explanation:
The graph shows the growth curve of a rabbit population, which is increasing progressively over the years until it flattens out in 2002, which is surely related to the carrying capacity of this population, established at around 0.4 million rabbits.
<u>
Carrying capacity is the maximum number of inhabitants that can be in a given place according to the space and resources available</u>. The population can increase as long as they have the necessary space and resources to support a certain number of inhabitants. When the population exceeds its carrying capacity, it experiences a decrease in growth.
<em>In the graph, the growth of the rabbit population decreased when it reached a number of inhabitants of 0.4 million.</em>
Learn more:
Carrying capacity brainly.com/question/1082066
