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.
This is how your system digest, where the circulatory decides what stays in the body (like nutrients) and what is digested.
That answer would be D.
Hope that helped :)
Answer:
Dragonflies are important for our environment.
Explanation:
Dragon flies belongs to the ancient family of insects. They are found on every parts of the world and have been from around 300 millions years ago. There are more than 5000 different species of them found in different parts of the world. Conserving dragonflies is important as they considered as a valuable environmental indicators.
Dragon flies are found in the areas where water is available and near grasslands. Their life cycle is an example of an incomplete metamorphosis. The dragon flies lays their eggs near the water or in the water. Dragon flies spends most of the life time as a nymph in the water where they turn into an adult and leave the water. The dragon flies rely on the aquatic ecosystems all through their life. Thus dragonflies are an important indicators of the environment and water quality.
Most of the life cycle of the dragon flies depend on the availability of water and its quality. Polluting water and destroying their habitat will result in the decline of the population of the dragon flies.
