Spanish Ecosystem Relationships and Cell Theory

¿Cuál es la unidad básica de estructura y función en los organismos?

• Tejido

• Célula

• Órgano

• Sistema de órganos

Answer explanation

The cell is the fundamental unit of structure and function in all living organisms. It is the smallest unit that can carry out life processes, making it essential for the organization of tissues, organs, and organ systems.

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¿Cuál de los siguientes es un factor biótico en un ecosistema?

• Agua

• Luz

• Temperatura

• Alimento

Answer explanation

Food is a biotic factor as it consists of living organisms that provide energy and nutrients to other organisms in the ecosystem. In contrast, water, light, and temperature are abiotic factors.

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¿Qué tipo de relación es cuando ambos organismos se benefician?

• Parasitismo

• Comensalismo

• Mutualismo

• Competencia

Answer explanation

Mutualism is a type of relationship where both organisms benefit from the interaction. In contrast, parasitism benefits one organism at the expense of another, commensalism benefits one without affecting the other, and competition involves struggle for resources.

¿Cuál de los siguientes es un ejemplo de un organismo unicelular?

• Humano

• Perro

• Bacteria

• Árbol

Answer explanation

A bacterium is a unicellular organism, meaning it consists of a single cell. In contrast, humans, dogs, and trees are multicellular organisms, made up of many cells.

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¿Cuál es el término para los organismos que producen su propio alimento?

• Heterotrófico

• Autotrófico

• Parásito

• Simbiótico

Answer explanation

Organisms that make their own food are called autotrophic. They produce energy through processes like photosynthesis, unlike heterotrophic organisms that rely on consuming other organisms.

¿Cuál de las siguientes describe una célula procariota?

• Tiene un núcleo

• Carece de núcleo

• Multicelular

• Contiene orgánulos

Answer explanation

A prokaryotic cell is characterized by lacking a nucleus, which distinguishes it from eukaryotic cells that do have a nucleus. Therefore, the correct choice is 'Lacks a nucleus'.

¿Cómo se llama la relación en la que un organismo se beneficia y el otro se ve perjudicado?

• Mutualismo

• Comensalismo

• Parasitismo

• Competencia

Answer explanation

The relationship where one organism benefits at the expense of another is called parasitism. In this interaction, the parasite gains resources while harming the host.

¿Cuál de los siguientes es un factor abiótico en un ecosistema?

• Plantas

• Animales

• Composición del suelo

• Bacterias

Answer explanation

Soil composition is an abiotic factor, as it refers to the non-living components of an ecosystem. In contrast, plants, animals, and bacteria are all biotic factors, as they are living organisms.

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¿Cuál es la organización jerárquica de menor a mayor?

• Comunidad, Población, Organismo

• Organismo, Población, Comunidad

• Población, Comunidad, Organismo

• Comunidad, Organismo, Población

Answer explanation

The correct hierarchical organization from smallest to largest is Organism, Population, Community. An organism is an individual, a population is a group of organisms of the same species, and a community is made up of different populations.

¿Cuál de los siguientes es un ejemplo de un organismo multicelular?

• Ameba

• Bacteria

• Humano

• Levadura

Answer explanation

A multicellular organism is made up of multiple cells. Among the options, a Human is multicellular, while Amoeba and Bacterium are unicellular, and Yeast is a fungus that can exist as unicellular or multicellular but is primarily unicellular.

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