Answer:
Graph A: Directional Selection
Graph B: Stabilizing Selection
Graph C: Disruptive Selection
Explanation:
Natural selection as a driving force of evolution cam be defined as a process that a population of organisms undergo in other to become adapted to an environment and survive to produce offspring that are fitter.
Thus, the following graphs represents the three types of natural selection:
Graph A: Directional Selection
Directional selection occurs when one extreme trait is favoured over others by selective pressures.
The graph shows that only one extreme trait is favoured as the population that survives seem to have majorly a particular extreme trait.
Graph B: Stabilizing Selection
In this type of natural selection, neither of the extreme traits are favoured by selective pressures. Therefore, intermediate trait become favoured over the other extreme traits.
Graph C: Disruptive Selection
Selective pressures works against the intermediate trait while both extreme trait at the spectrum are well favoured, which become more established in a population against the intermediate trait.
A lake that freeze over is helpful to the organisms inside the water because, the solid ice serves as a barrier between the water and the cold air above the water. The ice prevents the chilled air surrounding the water body from getting to the organisms inside the water. <span />
Answer:
D) 3' TGTAGTGCGCGCGT 5'
Explanation:
DNA strand: 5' ACATCGACGCGCGCA 3'
compliment: 3' TGTAGCTG CGCGCGT 5'
DNA strands are antiparallel which means that if you're given a 3' to 5' strand, the complementary DNA strand will be 5' to 3'. If you are given a 5' to 3' strand, the complementary strand will be from 3' to 5'.
The other thing to remember for <u>DNA </u>complementary strands <u>only</u> is:
- A always pairs with T
- G always pairs with C
(for DNA only!!!!) This is one of Chargaff's principles.
If you're asked to find the RNA sequence, A pairs with U. not T! Thymine does not apply to RNA. G still pairs with C though.
Answer:
The correct answer is - D. Meerkats are at a lower trophic level in the ecosystem than eagles, and the amount of energy stored in the meerkat population is less than that in the eagle population.
Explanation:
The sun's energy is stored in plants by photosynthesis. The insects are next in the food chain of life where their energy is then given to the meerkats or other small animals once eaten. The snakes and eagle-like birds are getting their energy and food from the meerkats.
The producers (plants) produce the energy so they are the first on the pyramid of the trophic level or lowest trophic level. Next are the primary consumers which get their energy and food from the producers. The meerkats would fit into this primary consumer or secondary consumer class. At that point, the tertiary consumers or predators come in, this would be the creatures that eat the primary consumers.
Answer: Visual aids are very useful during presentations, as they can help convey a message in a way that is clearer and more relatable than words.One visual aid that is particularly useful is a graph. Graphs can be used to represent statistics. In this case, you can provide data on the type or the amount of technology of a classroom, and you can display this data on a graph.Another useful aid is photographs. You can show pictures of students using technology in the classroom. This can also serve a rhetorical purpose, by forcing the audience to connect positive images with the idea of technology in the classroom.
Explanation: