Answer:
D
Explanation:
plants make their own food not animals, hope this helped :)
Answer:
The correct answer would be mitochondria or chloroplast.
Endosymbiosis refers to the evolution theory which explains the origin of eukaryotic cells from prokaryotic cells.
It is believed that cell organelles like chloroplast, mitochondria et cetera were free-living early prokaryotic cells which were taken inside the other cells by the process of endosymbiosis. It led to the origin of eukaryotic cells which were able to perform photosynthesis.
Thus, Keiko should mark chloroplast or mitochondria in the diagram.
Answer:
mitochondria, chloroplast
Explanation:
Moving up the food chain, the energy available to the organisms decreases due to metabolic heat. (You can add the second law of thermodynamics into it, if you want)
For example, in the rules of tens, the plants start with 100% of the energy but the fi red t level consumers gain 90% of the energy due to the fact energy transfers through heat.
Because of the change is available energy, consumers at the higher levels of the food chain are forced to hunt larger amounts of prey to sub stain themselves.
b. lac repressor
c. RNA polymerase
d. lac repressor and RNA polymerase
e. cAMP receptor protein (CRP) and RNA polymerase
Answer:
e. cAMP receptor protein (CRP) and RNA polymerase.
Explanation:
Lac operon is a type of inducible operon which can be controlled positively or negatively. A positively controlled operon is the one which is controlled through an activator while negatively controlled is the one which is controlled through a repressor. The inducer in case of lac operon is cAMP receptor protein (CRP) which forms a dimer and makes interaction in the upstream region of promoter of lac operon so as to facilitate transcription. Repressor in case of lac operon is a tetrameric protein which binds the operator region of lac operon and prevents gene expression by restricting RNA polymerase from facilitating transcription.
When lactose is present in high concentrations and glucose is in low concentration in the culture medium for a wild type E. coli strain, the control will be negative as well as positive.
If the glucose level is very low, an enzyme known as adenylyl cyclase becomes active and produces cAMP, this cAMP then forms a dimer by interacting with CRP to form a cAMP-CRP dimer which acts as an activator and binds to the upstream of lac promoter and helps RNA polymerase to initiate transcription.
Also because of high lactose concentration, lactose isomerises into allolactose which acts as an inducer and interacts with repressor to remove it from operator region. As soon as repressor is removed from the operator region, RNA polymerase starts transcription.
The mass extinction that led to the loss of 96% of marine life and 70% of terrestrial life was most likely due to a supernova, an asteroid impact or Volcanic Eruption.
An extinction event is defined as a widespread and rapid decrease in biodiversity on Earth. Those events are characterized by sharp changes in the diversity and abundance of multicellular organisms that occur when extinction rates increase relative to background extinction rates and species evolution rates.
This mass extinction which happened during the end of the Permian era. The extinction of 96 percent of all marine species and 70 percent of all terrestrial species resulted in catastrophic changes on Earth, which became almost devoid of all species.
The cause of this mass extinction is related to volcanic activity, supernova or asteroid impact which could have increased the average temperature of the Earth's surface.
Thus, the mass extinction that led to the loss of 96% of marine life and 70% of terrestrial life was most likely due to a supernova, an asteroid impact or Volcanic Eruption.
Learn more about Mass Extinction, here:
#SPJ2
Answer:
due to volcanic eruption
Answer:
would increase, population, and chances of getting more food for survival.
Explanation:
By the increase in secondary consumers, that would give more food and energy and the ease of finding food for the tertiary consumers, which will give more energy for activities and therefore sexual activity can no longer be lacking the energy barrier, and due to that the population of tertiary consumers increases, eventually leading to the same effect and increase in Quaternary consumers.