Answer: on the first question it is bacteria and sea cucumber
second question is the sun
Explanation:
Answer:
The chemical factors that determine traits are called genes.
The right answer is a. Eras
A geological era corresponds to the second largest unit of time on the geological time scale behind the eon.
* The history of the Earth is divided into ten eras:
Eoarchéen: -4.0 to -3.6 billion years;
Paleoarchean: from -3.6 to -3.2 billion years;
Mesoarchean: from -3.2 to -2.8 billion years;
Neoarcheen: -2.8 to -2.5 billion years;
Paleoproterozoic: -2.5 to -1.6 billion years;
Mesoproterozoic: -1.6 to -1 billion years;
Neoproterozoic: from -1 to -0.541 billion years;
Paleozoic: from -541 to -252 million years ago;
Mesozoic: from -252 to -66 million years;
Cenozoic: from -66 million years to the present day.
Answer:
The correct option is <em>E. Amino acids (and thus proteins) also have nitrogen atoms; thus, the radioactivity would not distinguish between DNA and proteins.</em>
Explanation:
The element phosphate is actively present in the DNA but it is not present in the proteins.
Nitrogen is an active constituent of the DNA as well as the proteins. Hence, if nitrogen will be used for the Hershey and Chase experiment, then the results will that we will get will be wrong. We wouldn't be able to distinguish between the nitrogen atoms which came from the DNA and the nitrogen atoms which came from amino acid or proteins.