Answer:
Explanation:
La contaminación de mares y océanos es una realidad creciente en estos tiempos y esto tiene graves consecuencias para la vida marina, como problemas de desorientación, alteraciones en las cadenas alimentarias, toxicidad para la fauna marina, destrucción de los ecosistemas marinos e, incluso, acaba habiendo también consecuencias para el ser humano.
En este artículo de EcologíaVerde veremos exclusivamente cómo afecta la contaminación del agua a los animales marinos, pues es necesario tomar consciencia del perjuicio que supone este gran problema ambiental para todos y no solo para las personas.
The primary function of all lymph nodes is the production of lymphocytes, which help defend the body against microorganisms and against harmful foreign particles and debris from lymph before it is returned to the blood stream. The major clusters of lymph nodes are in six areas.
Answer:
The statement that is correct is that all cells have the same genes, but different genes are active in different cells.
Explanation:
Differentiation or specialization is a function that cells possess and is what allows them to have different types of cells and tissues.
Cell differentiation depends on genetic regulation, a mechanism that determines the specific genes that are expressed in a cell or tissue type.
All cells contain the same DNA, which is organized into chromosomes and contain the genes that determine specific characteristics. <u>There is cell differentiation because some genes can be expressed and others are suppressed, all due to genetic regulation</u>.
The other choices are wrong because:
- <em>The eyes look different from the liver, because they have the same genes, but only some are expressed.
</em>
- <em>Differentiated cells and tissues do not lose their genes.
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- <em>All cells have DNA.</em>
Answer:toxic
Explanation:
A ureotelic organism excretes excess nitrogen as urea. Urea is less toxic and needs less water in comparison to Ammonia. Ureotelic organisms include cartilaginous fish, few bony fishes, adult amphibians and mammals including humans. The uricotelic organism excretes uric acid or its salts