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valina [46]
3 years ago
7

Ecosystems are closed environments. TRUE FALSE

Biology
2 answers:
Yanka [14]3 years ago
4 0
This is a false statement
zalisa [80]3 years ago
3 0
The statement is false
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What is shape does sulfur trifluoride form
aivan3 [116]
Butterfly shape - Each fluorine is attached to the sulfur by a single covalent bond. The SF3 molecule is very short-lived and its structure has not been determined experimentally. It is calculated to adopt a butterfly-shaped molecular geometry, belonging to the Cs point group.
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3 years ago
What is the key difference among the 20 amino acids that are used to make proteins?
Ray Of Light [21]

Answer:

Attached R side groups

Explanation:

The proteins are one of the important biomolecules which are directly coded by the genetic material of an organism.

The proteins are composed of the amino acids which possess, an amine group, a carboxylic group and an attached side group called the R group.

It is the R group of an amino acid which determines whether the amino acid will a polar or a non-polar amino acid molecule thus it determines the properties of the amino acid in terms of chemical properties. The R side group are involved in the formation of bonds with the substrate of the environment and the tertiary structure of the proteins.

Thus, the presence of different R group is the key difference in 20 amino acids.

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3 years ago
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Estupefacientes o psicotrópicas productoras de dependencia física o síquica, capaces de provocar graves efectos tóxicos o daños
gladu [14]

Answer:

Drogas.

Explanation:

Las drogas son sustancias que tienen un efecto modificatorio sobre el estado normal de la psique. Por tanto, estas sustancias influyen en el comportamiento o la experiencia del usuario, pudiendo tener un efecto alucinógeno, pero también sedantes o una mixtura entre ambos.

El término se usa generalmente para indicar sustancias que tienen un efecto muy fuerte (por ejemplo, heroína, cannabis, mescalina, alcohol). Aunque los estimulantes cotidianos como el café y el chocolate también pueden tener un efecto en la psique, generalmente no se clasifican como sustancias psicoactivas debido a su efecto relativamente leve.

Los medicamentos que tienen un efecto sobre la psique se denominan psicofármacos. No obstante, los medicamentos que no se clasifican principalmente como psicofármacos, como los antihistamínicos, los agentes anti-mareo y los betabloqueantes, pueden también tener un efecto psicotrópico.

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3 years ago
Interspecies Relationships
lianna [129]

Answer:

<em><u>Commensalism</u></em>=Birds that live among cattle to eat insects stirred up by grazing. it

<em><u>Commensalism</u></em>=An Egyptian plover eating bugs off of a giraffe or rhino.

<em><u>Parasitism</u></em>=A tick living on a dog drinking its blood

<em><u>Predation</u></em>=A bear catching and eating a salmon from a river.

<em><u>Predation</u></em>=A bobcat catching and eating a rabbit.

<em><u>Mutualism</u></em>=A clown fish living in the tentacles of an anemone protected from predators.

<em><u>Mutualism</u></em>=Bees gathering nectar and then spreading pollen from a flower.

<em>Parasitism</em>=A tapeworm living in the digestive system of a horse.

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What is the main sense organ for each of the five senses
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The BRAIN. All of the senses send message to the Brain
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