Which group of animals has a closed circulatory system featuring a single circuit and two heart chambers?

musickatia [10]

The answers to your question should be B hopefully it helped

6 0

3 years ago

Lipid polymers are often created by numerous non-polar fatty acid chains with a polar head lined up. Which is the best explanati

fomenos

Polymers are macromolecules composed of similar monomers joint through chemical bonds. Lipids are not composed of similar basic units, so they are not considered to be polymers. There is no formation of a polymer lipid.

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Together with proteins, carbohydrates, and nucleic acids, lipids are essential components of biological structures and are part of the biomolecules group.

When talking about polymers, we are referring to molecules composed of multiple similar units, the monomers. When many monomers join through chemical bonds, through the polymerization process, they form a polymer. These units do not need to be identical.

According to the polymer definition, polysaccharides, proteins, and nucleic acids are polymers. Lipids are not polymers because they are not composed of a repeated sequence of basic units.

Lipids are individual medium-sized molecules. There are different types of lipids: triacylglycerols, wax esters, phosphoglycerides, sphingolipids, and sterols.

According to their structure:

Simple lipids ⇒ Composed of an alcohol molecule and fatty acids.
Complex lipids ⇒ They are composed of alcohol, fatty acids, and different non-lipidic components, such as phosphates, amino acids, glucyds, amines, etcetera. These are the amphipathic molecules.

Membrane lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails. In membranes, they are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.

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6 0

2 years ago

What is the relationship between an individual named Pinus palustris and an individual named Pinus elliottii? (2 points)

Alborosie

Answer:

The Binomial nomenclature is the method by which the naming of the organism is done. Each and every organism is known by two names. One is the local name and other is global name which is used by all.

Explanation:

Explanation: The plants and animals are named according to the binomial nomenclature in which the first word of the name describes the genus of the organism and the second word represents the species of the organism.

Here, the individual having the name Pinus palustris and Pinus elliottii belong to the same same genus but different species as their first name is same.

6 0

3 years ago

Efferent neurons are motor neurons carrying information out of the cns to the _______ and _______.

coldgirl [10]

Brain and other neurons

7 0

3 years ago

Three interworking items used to maintain artificial walls around a cavity prep are

Alex73 [517]

Answer;

-Matrix

Explanation;

Matrix is used to maintain artificial wall around the tooth preparation.

Cavity preparation is the mechanical alteration of a tooth to receive a restorative material which will return the tooth and area to proper form, function and esthetics.

-Objectives of cavity Preparation: remove all defects and give the necessary protection to the pulp, locate the margins of the restoration as conservatively, form the cavity so that under the forces of mastication the tooth or the restoration will not be displaced and also Allow for the esthetic and functional placement of a restorative material.

7 0

3 years ago