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Vladimir79 [104]
3 years ago
5

20. Different kinds of cells in living things contain many of the same elements. What are the elements most

Biology
1 answer:
ICE Princess25 [194]3 years ago
8 0

Answer:

I'm pretty sure that its A.

Explanation:

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Which of these is an abiotic factor of an aquarium ecosystem?
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<span>b. gravel on the bottom of the aquarium</span>

An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system.  <span> 
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Biotic factors:
Plants
Microorganisms
Macroorganisms

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Within the leaf, there are many air spaces between cells of the
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Spongy mesophyll is your answer
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Estimate how much the brain would swell due to osmosis if the concentration of the cerebrospinal fluid fell to 280mm. in other w
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Since the average osmotic pressure of the brain is 300mM and the concentration of the solution is 280mM, that means there is 20mM difference between the brain cells and CSF. This will induce osmosis and cause water to move from the CSF into the brain until the concentration becomes same. Assuming brain volume is 1200ml and the CSF constantly replaced, then the estimation of fluid should be: 20mM/300mM * 1200ml= 80 mlIf it made percent it should be: 80ml / 1200ml= 6.67%
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2 years ago
Porque los bioelementos y las biomolegulas son importantes para todos los organismos
miss Akunina [59]

Explanation:

Bioelementos

De los más de 100 elementos encontrados en la Tabla periódica, la materia viva está

constituida por unos 70 elementos y solo alrededor de 21, son esenciales para el desarrollo y

conservación de la vida. Estos elementos se llaman bioelementos o elementos biogénicos.

Bioelementos Primarios

Están formados por: C, H, O, N, P y S, los cuales constituyen alrededor

del 96.2% de la materia viva en base seca. Son los componentes

fundamentales de las biomoléculas. Son iimprescindibles para formar:

carbohidratos, lípidos, proteínas y ácidos nucleicos.

Clasificación de

los bioelementos

Bioelementos Secundarios

Grupo comprendido por los iones: Na+

, K+

, Ca2+, Mg2+, Cl-

. Estos

elementos aunque se encuentran en menor proporción que los

primarios, también son indispensables para los seres vivos. En medio

acuoso (solvente presente en células tejidos y órganos), siempre se

encuentran ionizados.

Oligoelementos

Son aquellos bioelementos que se encuentran en los seres vivos en un

porcentaje menor del 0.1%. Algunos, los indispensables, se encuentran

en todos los seres vivos, mientras que otros, variables, solamente los

necesitan algunos organismos. En este grupo se encuentran: Fe, Cu,

Zn, Mn, I, Ni y Co (que aparecen en la mayoría de los organismos) y Si,

F, Cr, Li, B, Mo y Al (sólo están presentes en grupos concretos).

Constituyen menos del 0.1% y son esenciales para desempeñar

procesos bioquímicos y fisiológicos.

4 0
2 years ago
A protein region with a specific function and structure is called a.
tia_tia [17]

Answer:

A protein region with a specific function and structure is called a. Select one: a. conserved site.

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