Answer: a. Adenine
Explanation:
Two types of chemically similar nucleic acids, DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), are the principal information-carrying molecules of the cell. The bases adenine, guanine, and cytosine are detected in both DNA and RNA while thymine is observed only in DNA, and uracil is located only in RNA. When it comes to defining the nucleic acid-based in the nature of its nitrogen- and carbon-containing ring structure we have the variation that answers the question. While b. Uracil, c. Cytosine, and d. Thymine only contains a single ring, which we call pyrimidines, the biomolecule a. Adenine contains a pair of fused rings that we call purines, the right answer for the question.
Answer: reproduction, heredity, variation in physical characteristics and variation in number of offspring per individual.
Explanation:
Answer:
look for any neuro responses by stimulating the alien subject to responde the stimulations
Explanation:
The type of selection that makes tall oka trees a better competitor for sunlight over short ones would be directional selection.
<h3>What is directional selection? </h3>
It is a kind of natural selection in which individuals with traits at one extreme end of the population are better adapted to the environment.
In this case, tall and short oak trees are at the two extreme ends of the population mean with tall oak trees being able to better competitors for sunlight than the short ones.
The selection is, thus, directional, towards the tall trees rather than the average or the short ones.
More on directional selection can be found here: brainly.com/question/12226774
