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2 years ago

Write two differences between the unicellular and multicellular organisms.

Biology

2 answers:

UNO [17]2 years ago

6 0

Answer:

The cell membrane is the semipermeable membrane of a cell that surrounds and encloses its contents of cytoplasm and nucleoplasm. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid.

Explanation:

Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. ... Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions

vlabodo [156]2 years ago

4 0

Answer: The cell membrane is the semipermeable membrane of a cell that surrounds and encloses its contents of cytoplasm and nucleoplasm. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid.

Explanation:

Cell membrane, also called plasma membrane, thin membrane that surrounds every living cell, delimiting the cell from the environment around it.

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What protects cells from the particles outside

Elenna [48]

The Cell Wall protects the cell from particles outside.

8 0

3 years ago

Select the organs that are a part of the respiratory system.

denpristay [2]

Answer:

Nose, Pharynx, Larynx, Tracha, Bronchi and Lungs

7 0

3 years ago

Which of the following is an important exception to the central dogma of molecular biology? a) Proteins are responsible for most

iogann1982 [59]

Answer:

b: many genes code for RNAs that function directly in the cell

Explanation:

The central dogma theory describes the basic framework for gene expression in living organisms. Genetic information from DNA is encoded or transcribed as RNA which then becomes translated as proteins.

The processes that take place for gene to be successfully expressed are;

Replication
Transcription
Translation

Replication is a process whereby DNA makes a copy of itself to be distributed in daughter cells during cell division.

Transcription is the process whereby genetic information in DNA is encoded as RNAs. The RNAs are short-lived as they are quickly utilized in protein synthesis or translation process.

Hence, the RNAs do not function directly in the cells but mere intermediaries in the synthesis of proteins.

The correct option is b.

3 0

3 years ago

imagine a model of a cell shaped like a cube.Calculate the ratio of surface area to volume for a cell model measures 3 cm on eac

Svet_ta [14]

Smaller cube (1 cm X 1 cm X 1 cm)

The surface area of one side = 1 cm X 1 cm = 1 cm2

There are 6 sides, total SA = 6 X 1 cm2 = 6 cm2

Volume = 1 cm X 1 cm X 1 cm = 1 cubic cm (1 cm3)

Surface to Volume Ratio = 6 cm2/1 cm3 = 6 cm2/cm3

Larger cube (6 cm X 6 cm X 6 cm)

The surface area of one side = 6 cm X 6 cm = 36 cm2

There are 6 sides, the total SA = 6 X 36 cm2 = 216 cm2

Volume = 6 cm X 6 cm X 6 cm = 216 cm3

Surface to Volume Ratio = 216 cm2/216 cm3 = 1 cm2/cm3

8 0

3 years ago

1.) Librarians organize books according to a classification system. Describe another type of classification system you have seen

marysya [2.9K]

Answer and explanation:

<h3>1. Librarians organize books according to a classification system. Describe another type of classification system you have seen or used.</h3>

Similar to the way librarians organize their books, taxonomists and biologists can classify living organisms.

In terms of biology, the taxonomic categories of species is a system used to group different species according to their physical and functional characteristics and their phylogenetic relationship.

Taxonomy can classify living organisms into domains - according to their cellular characteristics, as well as placing them in Kingdom, Phylum, Class, Order, Family, Genus and Species.

For example, man (Homo sapiens) is classified, according to his taxonomy in:

Domain: Eukarya.
Phylum: Chordata.
Class: Mammal.
Order: Primates.
Family: Hominids
Gender: Homo
Species: Homo sapiens.

The taxonomic classification system is a way of establishing differences and similarities among living beings, as well as offering an approximation to their morphology and specific functions within nature.

<h3>2. Describe three examples of how are plants and animals different</h3>

Plants belong to the Plantae kingdom, while animals belong to the Animalia kingdom, and there are clear differences between them:

Plants have no movement, while animals do.
Plant organisms are capable of processing their own nutrients (autotrophs), through sunlight, carbon dioxide, oxygen, water and inorganic nutrients from the soil. Animals (heterotrophic) require to obtain their nutrients by consuming plants or other animals.
In plants, plant cells have cloproplasts and chlorophyll, which are necessary for photosynthesis and to obtain energy substrate. The animal cell has mitochondria, which are in charge of cellular respiration, a process that provides them with energy.

<h3>3. Describe three examples of how are plants and animals are similar</h3>

The similarities between plants and animals are based on the general characteristics of some living organisms:

They are eukaryotic multicellular organisms, formed by biomolecules such as carbohydrates, lipids and proteins.
They have the capacity to reproduce and respond to stimuli.
The metabolic pathways to carry out their organic processes - such as obtaining energy - are similar.

<h3>4. What are some differences between plants and fungi? What specific characteristics that you observed from this activity might help you classify this organism?</h3>

Some differences between plants and mushrooms are:

Plants are photosynthetic organisms, capable of processing their own nutrients. Fungi require feeding on organic matter (heterotrophic).
The nutrition of plants is by absorption of inorganic nutrients from the soil, while fungi perform an external digestion process and then make the absorption.
From the cellular point of view, the wall of the plant cells is predominantly cellulose, while in the fungi the main component of the cell wall is chitin.

An observable characteristic that allows us to establish the difference between plants and fungi is that plants are generally green, due to the presence of chlorophyll, necessary to carry out photosynthesis, while fungi are of variable colors, such as white, yellow, reddish or brown (they lack chlorophyll).

4 0

3 years ago