Answer:
It's important to not touch the sides or the bottom of the test tube with the thermometer because touching it to the sides or bottom of the test tube fractures the glass and does not allow for correct temperature measurements.
Answer:
Cretaceous
Explanation:
From what has been examined so far, there are evidence that at the end of the Cretaceous period a very large asteroid or comet stuck the Earth. The impact was where modern day Yucatan is located, and it released such an enormous energy that it managed to change the face of the Earth. The explosion itself managed to kill off pretty much everything nearby, but there was also a very hot wave that circled the whole planet. Enormous amounts of dust and ashes were released into the atmosphere that blocked the Sun, and the volcanoes all over the globe were triggered. This caused major climate and environmental changes, leading to a mass extinction, with the most noticeable victims being the dinosaurs.
Answer:
The correct answer is D. some RNA viruses.
Explanation:
The enzyme reverse transcriptase (RT) is found in some retroviruses, such as HIV. It is a DNA polymerase, which converts the single stranded RNA of the virus into a double stranded DNA (retrotranscription process).
Answer:
Organisms with higher fitness means that they have survived to an advanced age.
Explanation:
Fitness describes how successful organisms are at reproduction, survival, and mating. An organism is fit by how they survive and produce offspring, to do that, they need to live to an advanced age than organisms without fitness.