Mutation and migration violate the Hardy Weinberg Principle as they will cause evolution in the population.
Explanation:
The Hardy-Weinberg Principle has five assumptions:
No random mating in population, no mutation, no natural selection, population is large and no flow of gene. These are the conditions in which no evolution takes place.
Migration will cause gene-flow which is a causative of evolution.
Gene flow is movement of genes in or out of the population as individuals migrate. The migrated population will have new alleles or those already existing will have different ratios than the population they entered. Thus, gene flow causes evolution.
Mutations are the changes at genetic level. They are strong enough to change the gene and alleles and are causative of Genetic variation. This will lead to evolution which is in disparity with Hardy-Weinberg Principle.
These two events will affect the Hardy-Weinberg principle by causing evolution which is not accepted in the principle. Population will drift from Hardy Weinberg population.
Answer:
She got infected through the water she drank at the stream.
Explanation:
Protozoa is a type of pathogenic microorganisms.
Giardia are flagellate protozoa that cause the disease called giardiasis. The parasites enters the body through ingestion of contaminated food or water The food or water are usually contaminated by the feces of infected people or animals.
The protozoa attach to the lining of the host’s small intestine, where they prevent the host from fully absorbing nutrients. They may also cause diarrhea, abdominal pain, and fever.
The symptoms in the question above points to a likelihood that Terri’s sickness was caused by a Giardia protozoa.
Answer:
Neurotransmitter
Explanation:
A neurotransmitter is a signal which transmits information between neurons at the end of the axon. This neurotransmitter can either be excitatory or inhibitory. Whenever an action potential is triggered within a neuron, the neurotransmitter releases this action potential into the synapses at the axon as either an excitatory or inhibitory signal before a new action potential is triggered.
Answer:
<em>The correct option is cell surface markers.</em>
Explanation:
The immune cells of our body detect foreign particles and generate responses so that our body can get rid of them. The foreign particles are often termed as antigens.
The immune cells such as antibodies possess cell surface receptors which detect the foreign objects or antigens. When the cell surface receptors detect any antigen they immediately recognize that a foreign particle has invaded the body and they then identify it and start to generate response.
Answer:
Option C
Explanation:
Gastrocnemius and soleus muscles are jointly known as calf. Gastrocnemius is the larger muscle and connects to the knee joint while soleus is smaller muscle that connects to the portion of leg just below the knee. When gastrocnemius is stretched, the knee remains straight while when the soleus is stretched the knee bends. If a person feels difficulty in bending or stretching the knees, he/she must be facing the problem with the calf muscle. Hence, Option C is correct
