Answer:
Yes
Explanation:
A high quality DNA sample will have a 260/280 ratio of around 1.8. This value means that the DNA is sufficiently pure and free from other contaminants that could affect downstream experiments and analysis.
The ratio for this sample is 0.489/0.257 = 1.9
This is close to 1.8, and therefore the sample is of sufficient quality ot use downstream.
Answer:
In gymnosperms the female reproductive part is the cone and the pollen is the male reproductive part. Pine trees and other gymnosperms produce two types of cones. Other gymnosperms and pine trees produce two kinds of cones. The larger female cone, which is the seed cone and the male cone called the pollen cone.
The cones of gymnosperms, flowers of angiosperms, and the reproductive fronds of ferns all have a fundamental reproductive unit that is a leaflike organ bearing sporangia.
The parallel evolution of flowering plants and pollinators represents a case of coevolution. It may lead to different types of natural selection.
<h3>Disruptive, stabilizing, and directional selection</h3>
Disruptive selection is a type of natural selection that favors extreme phenotypes (in this case, flowers too small or too big).
Stabilizing selection is a type of selection that leads to decreased genetic variation (in this case, all red flowers to attract pollinators)
Finally, directional selection is a type of natural selection where an extreme phenotype can be favored (in this case, taller plants to be noted by bees).
Learn more about natural selection here:
brainly.com/question/23929271
Answer:
D
Explanation:
RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom)
