A: Gram Stain
Y: It's the first method that's used when Identify an unknown prokaryotic cell to divide it into two groups: Gram-Positive and Gram-Negative.
S: https://en.wikipedia.org/wiki/Gram_stain
^.^
- Amanda
Answer:
The correct answer is option d. "India was a separate continent until 45 million years ago".
Explanation:
135 million years ago, Pangea was a single continent that became separated into Laurasia in the north and Gondwana in the south. India was part of Gondwana along with Australia, South America, Antarctica and Africa. However, as a result of tectonic activity India got separated from Gondwana. This period of time at which India was a separated continent is the factor that most likely explains why animals and plants in India differ greatly from species in nearby southeast Asia. At being a separated continent, India's plants and animals go through an independent evolutionary process which made them very different an unique from nearby species.
Answer:
ice age/ Quaternary glaciation
Explanation:
Ice ages have occurred in the earth history and do occur more or less regularly in a cycle. It is believed that ice ages are as a result of small changes in the earth's orbit and also dependent on the solar cycles. The temperatures on the earth reduce causing the ice sheets in the poles to extend to the subtropics.