Answer:
Option B and C
Explanation:
When a population is said to be in Hardy Weinberg’s Equilibrium, it is assumed to obey the following assumptions –
a) There is random mating among the organism
b) The mating should not be selective and in order to achieve so the population size must be infinite
c) There should be no loss or gain of allele thereby assuring that there is no selection, mutation, migration etc.
d) Also there must be no crossing among organism belonging to different generation
With all such assumptions, the allele frequencies will remain either constant thereby producing infertile recessive homozygous species or fertile heterozyous species.
Hence, option B and C are correct
So it doesn't accidently get caught and knocked off the table.
Answer:
They block communication between enhancers and nontargeted promoters.
Explanation:
Insulator sequences control transcription in multicellular eukaryotes. They are present near the enhancer region of a gene. When required proteins bind to them, they get activated. They interact with the enhancer region and hamper its function. Enhancer sequences increase the rate of transcription by interacting with the promoter region. Insulators block the communication between enhancers and non target promoters by various methods. For example, they can form a loop domain between enhancer and promoter which avoids them form interacting. In this way, transcription is halted.
A changing environment can cause increased rates in speciation and extinction. For example, a changing climate, such as a change from a warmer Earth to a colder Earth that would have happened in the Ice Age, could result in mass extinction of certain groups of species that are not able to adapt to colder temperatures. Other phyla that can adapt will flourish and fill the niches presented by the new conditions. For example, climate change is presumed to have been a factor that resulted in the extinction of the dinosaurs and the rise of the mammals.
C. Points of high elevations