The correct answer would be the third option. Phytochemicals are plant compounds with the ability to stabilize free radicals. These are substances produced by plants that functions in helping them to survive over their predators, pathogens and competitors. They can be produced through primary or secondary metabolism. These compounds are considered as research compounds instead of essential substances since they have not been established to have good effects. Some phytochemicals are beneficial to humans while some are toxic and can interfere with the absorption of nutrients in the body. Examples of these compounds are carotenoids, polyphenols, anthocyanins, flavanols, catechins, lignans, isoflavanones and proanthocyanidins.
Answer:
Asexual reproduction yields genetically-identical organisms because an individual reproduces without another. In sexual reproduction, the genetic material of two individuals from the same species combines to produce genetically-different offspring; this ensures mixing of the gene pool of the species.
It is sex-linked: genetic red–green color blindness affects males<span> much </span>more<span> often </span>than females<span> because the genes for the red and green color receptors are located on the X chromosome, of which </span>males<span> have only one and </span>females<span> have two.</span>
Answer:
As part of the development of the neural tube, by the sixth week of embryonic development, the brain vesicles are already formed.
Explanation:
The encephalic vesicles correspond to a group of dilations that will give rise to the brain and its related structures.
Around the 4th week of embryonic development, the primary encephalic vesicles are formed, and by the 6th week there will also be secondary encephalic vesicles, for a total of five divisions.
The five encephalic vesicles formed in week 6 of embryonic development are the myelencephalon, metencephalon, midbrain, diencephalon and telencephalon.
- <em><u>myelencephalon
</u></em>: It is the structure that is organized to form the spinal bulb, in addition to the motor nuclei of the cranial nerves (pairs) IX to XII.
- <u><em>Metencephalon</em></u>
: It gives rise to the cerebellum and the protrusion.
- <em><u>Midbrain</u></em>
: It forms important structures such as the Edinger-Westphal nucleus, the wing plates, the tegment - together with the nuclei of the cranial nerves III and IV - and the upper cerebellar pedicles.
- <u><em>Diencephalon</em></u>: gives rise to the Thalamus, hypothalamus and pituitary gland.
- <em><u>Telencephalon</u></em>: originates the structure of each cerebral hemisphere, besides the striated body and its respective divisions in caudate and lenticular nuclei.