Answer:
The sympathetic chain contains a group of cell bodies called the sympathetic chain GANGLIA. This structure contains a second cell body for the sympathetic nervous system, the first in the series being found in the THORACOLUMBAR REGIONS' lateral horn of spinal segments T1-L2. The purpose of the VENTRAL AND DORSAL rami is to carry visceral motor and visceral sensory neurons to and from this sympathetic chain.
Explanation:
The sympathetic trunks (sympathetic chain, gangliated cord) are a paired bundle of nerve fibers that run from the base of the skull to the coccyx.
See the picture attached.
Answer:
Which type of selection tends to increase genetic variation? A. Disruptive selection B. Directional selection C. Stabilizing selection
The Answer is option A (Disruptive selection)
Explanation:
Selection can either shift the mean value of a trait, reduce the trait's variation, or increase its variation.
Genetic variation which allows natural selection to increase or decrease frequency of alleles already in the population is a source of phenotypic variation as it refers to differences in all the hereditary information of members of the same species.
Disruptive Selection is important in maintaining variation and initiating speciation as it Increases Variation by favoring alleles corresponding to more extreme phenotypes. But for it to occur, the mean phenotype has to experience the lowest fitness. Disruptive selection affects the frequency distributions of alleles and genotypes within a population.
Disruptive selection is based on the variance of a trait in a population as it increases genetic variance by equalizing the frequencies of existing alleles at polymorphic loci (a genetic loci with two or more alleles). Disruptive selection maintains and may even increase variation in natural populations by favoring extreme phenotypes, individuals with extreme values for a trait have greater reproductive success than individuals with intermediate values.
Answer:
A: Heat flows in all directions
D: The atoms near the candle absorb heat first
F: Heat flows from the warmer atoms to the cooler atoms
Explanation:
Answer:
A. Cyanobacteria.
Explanation:
Both cyanobacteria and plants use water as an electron donor for the light phase of photosynthesis and make ATP and NADPH. The ATP and NADPH are used in the Calvin cycle to fix the atmospheric CO2 into glucose. The use of water as an electron donor releases oxygen gas as a by-product. This photosynthesis wherein the use of water as an electron donor releases oxygen gas as a by-product is also called oxygenic photosynthesis.
Answer:
Please see below
Explanation:
A. Zebra mussels are located in the areas of the United States that they were introduced to but it continues to spread across the US as time progresses.
B. Since the Zebra mussels can attach itself to solid surfaces, boats are no exceptions. They are able to go a few days out of water which gives them enough time to remain attached until a boater takes the vessel to another lake or isolated body of water.
C. Since these are filter feeders they are growing without a natural predator since they are an invasive specie. They feed on the algae in the water and use up almost all of this food supply and makes resources for other native specie (fish) that depend on this food source to die out.
D. Burmese pythons in the Florida everglades are an invasive specie. The prey on endangered species, have no real predator and have voracious feeding habits that affect the numbers in the animal population.
E. Non- native mongoose was introduced on Jamaica to control the snake population. The problem with introducing a non native specie would be that this new organism is also without a natural predator. After the target specie has been eliminated it may try to feed on other animals in the ecosystem as well.
F. Invasive species need to adapt to weather conditions and should be able to hunt/acquire its food in order to survive in its new environment.
