Answer:
B
Explanation:
The rate of mutations on the S. Aureus population increased when exposed to antibiotics over time. This gave rise to a few mutants of the bacteria that could survive the methicillin antibiotic. This is because the mutation altered a protein target of methicilin (beta-lactam binding proteins) on which the antibiotic acted upon. These populations increased as the others were eliminated by the antibiotic – the way natural selection works. Over time, these mutations were transferred to other populations of bacteria by these MRSA through ‘sexual’ horizontal gene transfer, causing whole bacteria populations to be resistant against methicilin.
There growth and brain development better right?
Answer:
the alveoli are made of thin squamous (type I) alveolar cells which allows for the quick diffusion carbon dioxide and oxygen.
Explanation:
Diffusion of gases takes place between the alveolar cavity and the blood in the capillaries. Oxygen being more concentrated in the alveoli diffuses across the epithelium of the alveoli and the endothelium of the capillaries into the blood. The epithelial walls of the alveoli are moist and thin thus enhancing the diffusion.
C. Clouds
Explanation - The solar radiation is absorbed by the earth that keeps the atmosphere or the environment of the planet warm. Clouds do not absorb, rather reflects the solar radiation thereby keeping the earth's surface cool.
Thin clouds allows the transmission of the incoming solar radiation towards the earth. Sweater is not involved in maintaining the temperature of the earth. It just keeps our body warm by absorbing solar radiation. Mountains also absorbs solar radiation and helps the plants to grow and animals to live.
Answer:
1.Sea urchins are powerful primary consumers in the kelp forest. 2. Kelp is the producer in the kelp forests. 3. Bat star are omnivores and scavengers and at the end of the food web are tertiary consumers. 4 Phytoplankton are primary producers. 5. Zooplankton is a primary consumer in the food web.
Explanation:
1.Sea urchins are powerful primary consumer in the kelp forest because they are needed to keep the kelp anchored to the bottom of the ocean and algae . 2. Kelp is the producer in the kelp forest kelp forests provides an ecosystem for many organisms from the sea floor to the surface and provides shelter for many forms of sea life. 3. As a scavenger bat star is important in the ecosystem helping clean dead animals, and algae from the seafloor, the bat star keeps the seafloor healthy. 4. Phytoplankton are accounted for about half of photosynthesis on the planet, which makes them an important producer of oxygen, and serves as food source for smaller sea organisms, they consume carbon dioxide that would otherwise dissolve in the sea water making it more acidic. 5. Zooplankton are the animal like primary consumers of plankton community they also provide the base for the entire food web also if plankton disappeared it would increase the levels of carbon in our air.
