Answer:
C.
Explanation:
A. This makes no sense because the chart is only about the number of fish not about the number of plants that have grown
B. Makes no sense???
C. This is correct because it provides a reason why the number of fish in the stream next to the orchard have decreased
D. Makes no sense as well
Answer:
1. Mutation
2. Epigenetics
Explanation:
1. Mutation occurs when there is a change in an organism's DNA sequence as a result of mistakes in DNA replication or as a result of environmental factors like smoking. The mutation in a single organism can be passed on to other generations hence causing a genetic variation in the population, this obeys the Darwin's law that inherited traits (genetic) are passed on to other generations
2. Epigenetics are changes in gene expression that doesn't involve changes in the DNA sequences unlike mutation. This changes can be passed on to other generations and hence cause a variation in the population. This obeys the Lamarckian evolution that acquired traits are passed on to other generations.
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
Answer AND Explanation:
The variations that Darwin regarded as raw materials for the process of evolution have been traced to changes that occur at the gene level or the chromosome and these changes are called mutations. Organisms with beneficial mutations are able to pass them on to their offspring during reproduction. Transmission of such mutations through many generations could lead to the emergence of new species. The emergence of new species requires a long time and is also affected by the rate of mutations that a particular species undergoes. This leads to evolution.
Terminal buttons.
Explanation:
Neurons are longest animal cell that serve as the basic unit of their nervous system.
The neuron is divided into two parts-
Cyton: It is the cell body of the neuron. It has projection extending from the cytoplasm that receive signals called dendrites.
Axon: It is a long process extending from the cyton that carries the impulse from cell body to end of neuron. The axon terminate at knob like structures called terminal button . These release neurotransmitter and are rich in mitochondria.
The three basic steps that are common to all sensory systems are as follows:
1. They all receive sensory stimulation usually by means of specialized receptor cells.
2. They all transform the stimulations received into neural impulses.
3. They all transport the neural impulses to the appropriate section of the brain.
