The head of a phospholipid can be descibed as

Answers

Answer 1
Answer: Phospholipids are a class of lipids and are a major component of all cell membranes as they can form lipid bilayers. Most phospholipids contain a diglyceride, a phosphate group, and a simple organic molecule such as choline. 

Amphipathic character 
The 'head' of a phospholipid is hydrophilic (attracted to water - polar), while the hydrophobic (non-polar) 'tails' repel water. The hydrophillic head contains the negatively charged phosphate group, and may contain other polar groups. The hydrophobic tail usually consists of long fatty acid non-polar hydrocarbon chains.


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1)While the Lophophorata (this groups includes worms and mollusks) are a well-recognized group, phylogenetic (family tree) studies do not yet agree on the identity of their closest relatives.True
False
2)The marine flatworms (polycladids) are the smallest of the free-living flatworms, sometimes reaching lengths of 15 centimeters.
True
False
3)Bilateria is a classification within Animalia, and are characterized by animals which are bilaterally symmetrical (with a left and a right side to their bodies).
True
False

Answers

The right answer for the question that is being asked and shown above is that: "TRUE; TRUE; TRUE" (1) While the Lophophorata (this groups includes worms and mollusks) are a well-recognized group, phylogenetic (family tree) studies do not yet agree on the identity of their closest relatives. (2)The marine flatworms (polycladids) are the smallest of the free-living flatworms, sometimes reaching lengths of 15 centimeters. (3)Bilateria is a classification within Animalia, and are characterized by animals which are bilaterally symmetrical (with a left and a right side to their bodies).

There is a common misconception that traditional taxonomy is based on morphology, while cladistics is based on genetic data. How is this misconception incorrect?

Answers

Because if we only classify animals by morphology, many animals have the same describable traits and physical structures.
Genes helped taxonomy better classify and aggregate animals.


Molecular genetics is scientific study of composition of genes. This field is a subcategory of biology and heredity which is responsible for unearthing and delving the anatomy and physiology of the genes. 
This field helps us to understand and find evidence in the compounds, substances and elements found and synthesized in our genes and what contains in our nucleic acides –RNA and DNA –framework of our chromosomes. And also the origin and history of how genes came to be. These are codes and like-signals that makes us who we are in a macro-perspective.

This misunderstanding is wrong because both have the same definition but different meanings.

Taxonomy is the science of determining and naming groups of organisms based on the same basic characteristics.

Morphology (biology), is the study of the form of organisms, especially animals and plants that include their parts.

Further Explanation

This difference is what makes both have a misunderstanding. Because taxonomy is not based on morphology. In fact, both have their respective basics. Taxonomies determine and give names based on the same basic characteristics. While the morphology of science that studies the shape of organisms (animals and plants).

Organisms are grouped into taxa (singular: taxon) and these groups are given taxonomic ranks; groups that are given a certain level can be combined to form a supergroup with a higher level, thus creating a taxonomic hierarchy.

The term "alpha taxonomy" is mainly used today to refer to the discipline of finding, describing, and naming taxa, specifically species. In the previous literature, the term has a different meaning, referring to morphological taxonomy, and research products until the end of the 19th century.

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Details

Grade: High School

Subject: Biology

Keywords: taxonomy, morphology, organism

Where is the Golgi Body in an animal cell?

Answers

Answer:

The Golgi apparatus, also called Golgi complex or Golgi body, is a membrane-bound organelle found in eukaryotic cells (cells with clearly defined nuclei) that is made up of a series of flattened stacked pouches called cisternae. It is located in the cytoplasm next to the endoplasmic reticulum and near the cell nucleus.

Explanation:

A wilted flower placed in a vase of water for several hours became stiff and stood erect. When it was placed in a salt solution, it wilted. From this information what can we say about the cells of the flower? A) the flower cells are hypertonic to fresh water but hypotonic to the salt solution. B) the flower cells are hypotonic to the fresh water and hypertonic to the salt solution.C) the flower cells are hypertonic to both the fresh water and the salt solution.D) the flower cells are isotonic to both the fresh and salt water solutions

Answers

Answer:

Option A

Explanation:

The flower cells are hypertonic to fresh water but hypotonic to the salt solution.

Flower cell is hypertonic to fresh water, this means that the amount of solute in the solution outside the flower cell is higher than the solute content inside the flower cell.

While when a flower cell is hypotonic, it means that the amount of solute in the solution outside the flower cell is lower than the solute content inside the flower cell.

This is the reason why a flower plant placed in vase of water stood and become erect, while the same flower placed in a salt solution wilted.

Hence, option A is correct

Final answer:

The flower cells behave as hypertonic in fresh water, causing them to absorb water and stand erect, while they act as hypotonic in a salt solution, leading to water leaving the cells and wilting the flower.

Explanation:

From the information given about the flower's cells, the correct answer is A) the flower cells are hypertonic to fresh water but hypotonic to the salt solution. This is due to the process of osmosis, which is the movement of water across a semi-permeable membrane, like a cell wall, from areas of low solute concentration (hypotonic) to areas of high solute concentration (hypertonic).

When the wilted flower was placed in the fresh water, the cells were hypertonic causing water to enter the cells and making the flower stand erect. This is because there were more solutes inside the cells than the fresh water solution surrounding them.

On the other hand, when the flower was placed in the salt solution, it wilted because the cells were hypotonic compared to the hypertonic salt solution. There were fewer solutes in the flower cells than the salt solution outside, so water left the cells, which made the flower wilt.

Learn more about Osmosis here:

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Many birth-control pills release a constant amount of synthetic estradiols and progesterone for 21 days. True or False

Answers

Answer:

True

Explanation:

A kite suspended in the sky is flowing back and forth. Which type of friction is being described? static friction rolling friction fluid friction sliding friction

Answers

the answer is fluid friction

Answer:

fluid friction

Explanation: