Answer:
A, C, and D *maybe B but im not sure abt it*
Explanation:
Hello, energy first starts as a producers, they have the most potential energy, because as organisms eat other organisms, the waste product will be lost as heat. Producers are autothrophs because they obtain energy from the sun from photosynthesis. We then reach the next stage which is the primary consumers. These consumers are vegetarians and only eat producers, we call consumers heterothrophs. This food chain leads to the teritary consumer who eats and obtains the least amount of energy so, the tetriary consumners like cheetahs have to eat more of secondary consumers to obtain more energy to survive. The trophic levels of these food chains start from producers to quarternary consumers. The keystone species are species who use prominent resources to benefit the whole ecosystem of that certain region. This whole process is what is known as a Energy Pyramid.
Answer:
<u>Why do geologists use the geologic time scale?</u>
Because of the time span of Earth's past is so great, geologist use geologic time scale to show Earth's history.
<u>What is the geologic time scale?</u>
The geologic time scale is a record of the geologic events and the evolution of life forms as shown in the fossil record.
<u>How do scientists develop the geologic time scale?</u>
Scientists first developed the geologic time scale by studying rock layers and index fossils worldwide. With this information,scientists placed Earth's rocks in order by relative age. Later, radioactive dating helped determine the absolute age of the divisions in the geologic time scale.
<u>What do the divisions of geologic time scale depend on?</u>
The divisions of the geologic time scale depend on events in the history of life on Earth.
Hope these help, :)
No. animal cells are not as mobile as bacteria, which means they don’t need a flagellum. Animal cells do not need a cell wall- as the cell wall is primarily used to maintain structure, which is needed in photosynthetic plants. please give this brainliest!
The right answer for the question that is being asked and shown above is that: "b, founder effect." The blood group B is almost absent in Native Americans, whose ancestors arrived in very small numbers about 10,000 years ago. The factor that is responsible for this phenomenon is the <span>founder effect</span>