Answer:
Yes
Explanation:
After a traumatic brain injury, it sometimes happens that the brain can repair itself, building new brain cells to replace damaged ones. But the repair doesn't happen quickly enough to allow recovery from degenerative conditions like motor neuron disease
b. viruses lack genetic material
c. virues have no protein structure
d. viruses are composed of protein only
e. viruses are composed of both protein and lipid
Answer: A) Viruses lack cytoplasm and organelles
Explanation:
Viruses are composed of DNA and RNA and the protein as the genetic material. Virus is the smallest pathogens and it is different from other pathogen as they cannot reproduced by itself.
Virus lack cytoplasm and organelles that is why they are differ from all the pathogens.
Viruses are composed of genetic material and the proteins and it does not contain lipids.
Therefore, option (A) is correct.
Viruses differ from other pathogens in several ways, including a. lacking cytoplasm and organelles, b. having genetic material, and c. having a protein structure.
Viruses differ from other pathogens in several ways. These can be noted as -
Therefore, options a, b, c, and d are incorrect. Option e, which states that viruses are composed of both protein and lipid, is incorrect as well. Although some viruses may have an outer lipid envelope, this is not a defining characteristic of all viruses.
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Answer:
The functions of the skeletal muscles are affected by the CNS via the two sets of neurons, that is, lower motor neuron and upper motor neurons. The PNS comprises sensory neurons and motor neurons. The lower motor neuron is monitored by the upper motor neuron.
Hyporeflexia occurs because of the dysfunction of the lower motor neuron or its lesion. The lower motor neurons refer to the neurons, which innervate the skeletal muscles directly. Destruction to the central nervous system leads to hyper reflexes and destruction to the peripheral nervous system results in hyporeflexia.
b. Suppose an unusual heritable characteristic helped animals to live longer but made them sterile so they could not have any offspring. Explain why this heritable characteristic would not become more common in subsequent generations as a result of evolution by natural selection.
Explanation:
a. Some novel traits become fixed within a population, as they confer advantageous adaptations to an individual within their environment. These adaptations let these individuals live longer than their counterparts, and mate to produce more offspring over time, who also possess these traits.
b. For natural selection to act on a trait, it must confer a particularly beneficial advantage, and it should also be passed on to various offspring capable of surviving and reproducing at a higher rate. Without the ability to reproduce, natural selection cannot occur and is not influenced by an individual's fitness.
Natural selection leads to evolutionary change when individuals with certain characteristics have a greater survival or reproductive rate than other individuals in a population and pass on these inheritable genetic characteristics to their offspring.
Further Explanation:
Genetic variation has an important impact on small populations. There, mutations add up over time in a population, modifying the distribution of alleles or various forms of a gene. Natural selection may lead to loss of diversity in a population through genetic drift; one trait's allelic frequency increases significantly while others become less prevalent. Usually these differences exist because of occurrences of mutation and recombination.
Spontaneous changes within the genome occurring during the cycle of cell division are called mutations. These are defects of copies of the DNA produced within the cell; mutations may range from small modifications called single nucleotide polymorphisms to large-scale deletions and multi-gene additions.
Such mutations create variants which, within a group, become permanent, resulting in the creation of different, genetically distinct populations called species. Mutations occur over time in a population, changing the distribution of alleles or various forms of a gene-this is called genetic drift.
Learn more about mutations at brainly.com/question/4602376
Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316
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Answer:
False
Explanation:
Sex linked Traits can only ever be carried on the X chromosome that is why they are more common in males through a dominant Gene.
Answer:
The answer is true.
Explanation:
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A controversial issue of toxicology is the use of chemical additives in food.
Food additives are substances intentionally added to foods for the purpose of preserving, enhancing or modifying their physical, chemical, biological or sensory properties without impairing their nutritional value. However, it is necessary to control the use of these substances, as ingestion of these substances may pose health risks.
Additives are found in most processed foods, such as cookies, breakfast cereals, soft drinks, jellies, artificial juices, candies and a host of other foods in the diet of Brazilians, especially children.
Thus, its consumption should be controlled, as the health risk is confirmed by a sum of scientific studies. The three main ills associated with excessive consumption of these substances are cancer, food hypersensitivity and attention deficit hyperactivity disorder.
Some audiences are even more vulnerable to consumption, such as pregnant women, the elderly, people with little food and children under three years. In the case of children the attention should be greater because the digestive and urinary systems are not yet fully prepared to process these substances.
The more industrialized the product, the more chemical additives it will have. The ideal is to prepare fresh products at home. However, as is often not possible, it is important that you read the label and choose the products with the least additives.