B. DNA is double stranded, with the two strands both in the form of a helix entwined around each other like the strands of a rope.
The given question is not complete and the complete question is
Marsupials are found in North America and Australia, but they would not have been able to swim across the ocean. According to scientists, how did this group of organisms come to live on two separate continents?
A) Marsupials used to have adaptations that allowed them to swim but lost these adaptations over time.
B) The two groups of marsupials evolved independently of one another on two separate continents.
C) The continents were once connected, and marsupials were able to migrate over the land.
D) The oceans were shallow in prehistoric times, which allowed the marsupials to travel from one continent to another.
Answer:
C) The continents were once corrected and Marsupials are able to migrate over the land.
Explanation:
Marsupials are a group of animals which can give birth to young ones at an early stage and keep them in a pouch until they mature therefore also known as pouched mammals.
The evolutionary studies have shown that marsupials originated on a single landmass called Gondwana which separated into different continents. The marsupials used to live in the Gondwana land but after separation of land, the ancestors of marsupials separated and the marsupials evolved on the landmass of South America and Australia.
Thus, Option-C is the correct answer.
The population ecologist is trying to determine the density of the oak trees in a forest. It is a part of the job of a ecologist. By detecting the density of the oak trees, an ecologist can easily determine whether the density of the oak trees are decreasing or increasing with time and what are the steps that need to be taken to keep the balance.
Answer:
D
Explanation:
hope its right..if not im srry
Answer:
Babies and small children
Explanation:
I hope this helped!
