While many human activities produce greenhouse gases, the greenhouse effect is actually a natural process. Many atmospheric gases help trap heat in Earth's atmosphere, including natural gases like carbon dioxide. So while human activities exacerbate the natural greenhouse effect, it is not solely due to them.
<span>The era in which we now live is Cenozoic. The Phanerozoic is the eon in which we now live. It began 541 million years ago. However, the question is about the era in which we live. The Phanerozoic eon is divided into 3 eras: 1. the Paleozoic era - 541-252 million years ago; 2. the Mesozoic era - 252-66 million years ago; 3. the Cenozoic era - 66 million years ago until now. Thus, the era in which we now live is the Cenozoic era.</span>
Explanation:
multicellular organisms rely on mitochondria & getting food supplies by bloodstream...
Answer:
The chromosomes become visible under a light microscope during prophase stage of mitosis
Explanation:
Propohase -
The first phase of mitosis , in which the chromosomes becomes visible , as a distinct structure , the nuclear envelope breaks down and the spindle formation takes place .
Hence , this stage is visible under the light microscope.
The next phase is the metaphase , in which the chromosomes line up in middle of cell .
In the third phase , i.e. , the anaphase , the chromosomes moves towards the opposite sides of the vcell .
In the fourth phase , i.e. , the telophase , the two nuclei are formed .
In the last stage , i.e. , cytokinesis , the cell finally divides into two daughter cells .
Answer:
Prokaryotic cells lack a nucleus and membranous organelles.
Explanation:
Prokaryotic cells have the following features: 1. The genetic material (DNA) is localized to a region called the nucleoid which has no surrounding membrane.
