The only example of a species that lived in Utah during the mid Cambrian. Researchers believe the specimen probably drifted away from a community of similar stalked filter feeders. Credit: Julien Kimmig To the untrained eye, it looks like a flower crudely etched into rock—as if a child had ...
Name the two large groups (sub-divisions) of plants that produce seeds. What are the two main groups into which flowering plants are divided? How would you describe, what a phylogenetic tree of a newly discovered group of plant species represents?
a. Describe four human activities that have negative effects on Earth's ecosystems. b. How do human activities increase the occurrence of species extinction? c. Why are scientists concerned about the loss of species as a result of human activities? d. ...
going there for the second time and a few of them were researchers and research scientists. The peacocks of various species were so beautiful that most of the tourists took their pictures. This park was a great place to be and I took many photos on my camera and tried to save the ...
At first scientists thought the red planet was as lifeless as the moon with dust storms blowing over the large sandy deserts.But now the picture is very different with mountains and valleys cut by glaciers(冰川)and rivers running deep underground. ...
I had heard thousands of times about how plastic was polluting the ocean and endangering marine species, but I thought it was just a strategy adopted by scientists and environmentalists to draw people’s attention. This experience toppled my perception and prompted me to believe that if we di...
Scientists believe computers will become more intelligent than human beings. Some people think the development will be negative. To what extent do you agree or disagree? ... 环境类 Human activities have negative effects on plant and animal species...
2.Scientists believe computers will become more intelligent than human beings. Some people think the development will be negative. To what extent do you agree or disagree? 环境类 1. Some people believe that it is the responsibility of the politicians rather than the individuals to reduce the env...
A.how scientists are looking for signs of life on other planets B.why scientists are looking for signs of life on other planets C.where scientists are looking for signs of life on other planets D.when scientists are looking for signs of life on other planets小题3:The underlined word “mon...
The term "bird brain" is frequently used to describe a person's lack of intelligence and good decision-making ability. However, some scientists believe it should be considered a compliment, given that many birds can perform tasks that were once considered solely by humans. These include ...