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Vika [28.1K]
3 years ago
15

Discuss one of the major issues in toxicology from any perspective.

Biology
1 answer:
tangare [24]3 years ago
8 0

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.

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Terry saved some of the tooth-like objects within the hagfish's round mouth to analyze their composition in his mentor's biochem
Triss [41]

Answer:

The correct answer is option a. "scales".

Explanation:

The missing information of this question is the following:

"Terry catches a ray-finned fish from the ocean and notices that attached to its flank is an equally long, snakelike organism. The attached organism has no external segmentation, no scales, a round mouth surrounded by a s*cker, and two small eyes. Terry concludes it is a hagfish."

Gymnophiona is a group of amphibians characterized by having dermal scales as integumentary element. These amphibians are tetrapods and their scales are comprised of several layers of unmineralized collagenous fibers. The skeleton of the hagfish is made entirely of cartilage, therefore it is very likely that the tooth-like objects of hagfish's are made of cartilage, just like the scales of the tetrapod.

7 0
2 years ago
In plants, which of the following are produced by meiosis?
prisoha [69]

Answer:

The correct answer is option c. Haploid spores.

Explanation:

In the plants, spores are normally unicellular and haploid and produced by the process of meiosis in the sporophytic body of the plant.

These haploid spores undergo the mitotic division and develop a new individual called gametophyte that forms gametes eventually.

Thus, the correct answer is option C. Haploid spores.

4 0
2 years ago
Species A has a breeding call that is completely different from Species B. This difference in breeding call leads to
Minchanka [31]

Answer: The correct answer is option a.

Explanation:

Prezygotic isolation is a mechanism by which mating and fertilization is prevented. Thus, it prevents the formation of a zygote.

It can be achieved by various reasons such as temporal differences (difference in mating seasons), habitat isolation, behavioural differences (different mating rituals such as different dance patterns, voice calls, et cetera), mechanical isolation, et cetera.

Thus, different breeding calls prevent the species to interbreed with each which ultimately prevent the formation of zygote formation.

Hence, it is a type of prezygotic isolation.

3 0
3 years ago
How biology affects your health and mental wellbeing?
Phantasy [73]

Answer:

Explanation:  

Doctors,nurses and other medical stuff must study biology to learn how to aid both humans and animals. Learning about the human bodys inner processes, organs, neurological system, blood, reproduction development and diseases all prove essential for treatment and research.

5 0
2 years ago
Read 2 more answers
A scientist determined that a single celled organism has a membrane bound nucleus and organelles. The organism has a cell membra
erik [133]

Answer:

Protista

Explanation:

  1. Firstly, it cannot be bacteria because bacteria is prokaryotic with no membrane bound organelles. And it's cell wall is made of murein (peptidoglycan).
  2. It certainly isn't a virus virus because a virus has no true cellular structure.
  3. Let's see why we ruled out the other 3 eukaryotic kingdoms:
  • It can't be an animal because animal cells don't have cell walls and are multicellular.
  • It can't be fungi because its cell wall is made of chitin, not cellulose.
  • It can't be a plant because plants are all multicellular.
8 0
3 years ago
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