Draw the monomers of a lipid (glycerol + fatty acids)

scalar quantiy is something that has a only a magnitude or numerical measure such as time , length mass and temperature. While a vector quantiy has a magnitude and a direction for example velocity, displacement force, weight.

For example speed is a scalar quanity as it just how fast something is moving 50 mph, while velocity is a vector quantiy since is has the speed and direction something is moving 50 mph south.

Terrestrial organisms spend most of their life on land. One of the most important adaptations to live on land is the presence of limbs that allows the animal to walk on land. An example of organism with this adaptation is the lion, or a dog, or any other mammals with four limbs to walk on land.

In opposition to that, organisms that lives on aquatic biomes would not benefit from having the same limbs, as they need to swim instead of walk. So, one adaptation that aquatic organisms have is physical characteristics that allows them to swim, such as flippers. Therefore, examples of organisms with this adaptation are fishes, whales and dolphins (they all present flippers to get around on water).

1. Fish have gills that let them breathe in water. The gills of fish allows them to absorb dissolved oxygen from water.The water goes to the mouth of the fish and pushed it out of the fish's gills. This is their adpatation for beathing underwater.

2. Fish have color and color patterns that makes them blend in with their environment. It allows them not to be seen by their predator.

3. Fish use venom for defense. They produce toxins through the use of a spine.

4. Fish have a steamed line body that enable them to swim freely in water. This is their adaptive features.

Cells are the basic unit of structure and function of the human body organization as well as for any other living being. Not all cells in the body are equal, cells are specialized and each type carries a specific function.

Groups of cells of the same type form the tissues. There are four types of basic tissues:

- Connective tissue, is formed by cells with structural functions such as bones or cartilage, as well as blood.

- Epithelial tissue, is formed by cells that line the inner and outer body surfaces.

- Muscle tissue, is formed by cells that have the ability to contract.

- Nervous tissue, is formed by nerve cells, with the capacity of carrying electrical signals.

Two or more tissues form organs, which are structures that carry on specific functions.

And finally, the organ systems are formed by a group of organs that work together to perform complex functions.

So, without cell's activity, no body functions would be carried.

Answer:

Viruses are constantly changing through mutations and these mutations usually give rise to a new variant of the virus. Some variants appear and then disappear, while other variants persist.

The reason for its persistence or success are mutations that lead to increased transmissibility.

The spike protein is used by the coronavirus to enter human cells, and its changes may help the virus evade antibodies.

When a zygote is formed, by the female and male gametes, it starts a process called genetic recombination, where the sister chromatid exchanges material giving offspring with different alleles. This process is known as DNA crossing over.

So the answer is B.

Where in the second meiosis you have as a result recombinant chromatids.

Based on the method of obtaining food, sponges can hardly be found in the abyssal zone since they are filter feeders.

Sponges belong to the Phylum Porifera. They are aquatic invertebrates. Sponges obtain nutrition through the process of filter feeding, by which these organisms are able to filter the suspended food particles present in water.

A large number of sponges are marine and can occupy the intertidal zone as well as ocean floor generally up to a depth of 3000 meters. The abyssal zone is located very deep in the ocean and it is very hard to obtain food there.

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Polarity (Polar Molecule): It means the molecule carries a charge, which can be positive or negative. For example, water is a polar molecule. It has a partial negative charge on its oxygen side, while a partial positive charge on its two hydrogen sides.

Hydrogen Bonds: This is a type of attraction between molecules where one molecule has partially positively-charged hydrogen is connected to a molecule with an electronegative atom.

Cohesion: It is the attraction force between like substances. An example is water molecules getting frozen together without breaking their bond to one another.

Adhesion: It is the attraction force between two different substances. Like how water interacts on the walls of the xylem.

Hypertonic: It is a solution with high solute concentrations. A cell exposed to a hypertonic solution will shrink. The cell loses water.

Tonicity: It is the ability of a solution to cause a cell to either swell (gain water) or shrink (lose water).

Hypotonic: It is a solution with low solute concentrations. A cell exposed to a hypotonic solution will swell. The cell gains too much water.

Isotonic: It is a solution with an equal amount of solute and water concentration. A cell will have no change.

Phagocytosis: The cell engulfs large molecules and forms a vesicle to transfer the engulfed molecule.

Pinocytosis: The cell engulfs small molecules and also forms a vesicle to transfer the engulfed molecule.

Diffusion: It is a movement of molecules from an area of high concentration to an area of low concentration without spending energy. It also achieves a state of equilibrium. In a cell, there are molecules that just pass through the membrane.

Facilitated Diffusion: Compared to simple diffusion, facilitated diffusion aids the molecule going into the cell via channel proteins or carrier proteins. It also does not spend energy.

Osmosis: It is a diffusion of water molecules across a semi-permeable membrane. It is a movement of water from an area of low solute concentration to an area with a high solute concentration. It also does not spend energy.

The correct answer is DNA replication occurs only during the S phase of the cell cycle

Plasmas and gases have differences, but still share some characteristics. One of them is that they consist of particles in random motion. Therefore, they have the same space between particles. The correct answer is C.

Between the options the one that best describes the process of natural selection is: individuals that are well adapted to their environm

The system of measurement used worldwide that is based on the values of 10 is called the Metric System

It was based on the French word for SI

The official name of the metric system is the Système international d'unités or abbreviated SI.

The order of the metric system using the King Henry Died By Drinking

chocolate Milk is Kilo, hecto, Deca, Base unit, Deci, centi, milli.

The basic metric unit for mass is the grams which is abbreviated g.

The amount of matter an object contains is called mass.

Volume is the amount of space an object occupies.

The volume of the box is 24 cm³.

The metric system is a system of measurements based on decimals or units of 10. It officially called the Système international d'unités, SI.

Mass is measured in the base unit of grams.

Volume measures the space occupied by a given substance.

The volume of a box measuring 3 cm by 2 cm by 4 cm is calculated as follows:

Volume = 3 cm * 2 cm * 4 cm

The volume of box =  24 cm³

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The correct option is D

When a pathogen is detected and the body reacts to it, T and or B cells are activated, and these cells reproduce generating a response and a memory cell, both cells are generated through mitosis, therefore, are genetically identical, so taking this into consideration we can say that the correct answer is option 1.

Answer: They don't exhibit cell specialization.

Explanation: Multicellular protists, however, do not show cellular specialization or differentiation into tissues. That means their cells all look the same and, for the most part, function the same. On the other hand, your cells often are much different from each other and have special jobs.

Solution:

Remember that a domain is a taxon in the highest rank of organisms, higher than a kingdom. There are 3 domain classes, Bacteria, Archea, and Eukarya. Thus, the bacterium Staphylococcus aureus belongs to the domain

BACTERIA.

The production of bisexual gametophytes occurs in plants that are monoecious, that means they can produce both femenine and masculine reproductive organs.

Question: which three pairs of organisms are able to produce offspring?

In order for two organisms to reproduce, they must overcome certain barriers. Some examples are ethological (behavioral), biological and geographical barriers.

Ethological: An example of ethological barriers can be seen in birds. To mate, male birds mostly perform dances to attract females of the same species. However, the dances of one species are not attractive to another species, which prevents mating.

Biological: An example of a biological barrier is the existence of different species. 2 different species cannot mate for different reasons (the sperm cannot unite with the egg or the reproductive apparatus cannot mate).

Geographical: An example of a geographic barrier is the place where they live. Although 2 birds can mate biologically if one is in Asia and the other in America, they will never meet and never mate.

In the 3 images below we see 3 pairs of organisms that cannot mate due to a geographical, biological and ethological barrier respectively. Therefore, the tree pair of organisms that are able to produce offspring are the tree upper pairs

A dichotomous key is the tool that we use to determine the identity of an organism, and classify it under a particular taxonomical category, such as class, family, or species. These keys use characteristics that separate species by their nature, for example, their morphology, their lengths, their habitats, and such.

In the following drawing, we can see an example of a dichotomous key.

A change in the shape of the cell would be faster cellular response. Thus, option c is the correct answer.

In cellular response, cells respond to a certain stimulus be it from outside the cell or between the cells. A cell contains plasma membrane as the outer most layer, which is also a semi permeable membrane to the cells. It controls the solute particles that goes in and out of the cell.

Plasma membrane is made up of hydrophobic lipid bilayer with proteins embedded in it.  The proteins undergo confrontational change whenever a molecule has to go in or out of the cell.

If any particle or any stimulus has to enter or go out of the cell, then they have to go through the changes in the plasma membrane first thus, creating a different shape for the cell. Hence, the fastest thing in cellular response would happen is the change in the shape of cell.

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The plant's phenotype is its appearance. If we have the gene Rr, it that R is the dominant gene for wrinkled. As a result, we can only see the plant's wrinkled since the dominant gene masks the recessive gene.

In a broad sense, the term "genotype" refers to the genetic makeup of an organism; in other words, it describes an organism's complete set of genes. In a more narrow sense, the term can be used to refer to the alleles, or variant forms of a gene, that are carried by an organism.

Genotype generally remains constant from one environment to another, although occasional spontaneous mutations may occur which cause it to change. However, when the same genotype is subjected to different environments, it can produce a wide range of phenotypes.

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Yeast is a unicellular organism that is well known and used in baking processes because of its capacity of fermentation, which allows certain preparations to grow and be more spongy because of the air bubbles that are encapsulated in them.

Mitosis - remember the acronym PPMAT:

0. P - Prophase

1. P - Prometaphase

2. M - Metaphase

3. A - Anaphase

4. T - Telophase

5. C (Not included in the acronym) - Cytokinesis

Since now we have the acronym to define each successive stage of mitosis, we can list out the order the question asks us to order

The phases of mitosis in the sequence in which they occur is 3. Prophase, 2. Metaphase, 1. Anaphase, and lastly 4. Telophase.

The energy from the sun is catched by organisms that are able to do photosynthesis. Than those organisms will feed other ones and that process will continue through the food chain. So that energy flows in the ecossystem through feeding relationships. The answer is the third option.

The correct option is the first one, Hadean. The Hadean eon comprises the first 500 million years of the planet. During that time the Earth was devoid of life, since it has very hostile conditions.

Animals: Animal reproduction

Hermaphroditism is when a single organism can produce both female and male gametes. This makes reproduction easier, as an individual can mate with any other organism of the s

This is very common in invertebrates and is present only in sponges, but also on mollusks and earthworms.

This means that the sentence should read:

Sponges are hermaphrodites, which means one sponge produces both female and male reproductive functions.

So B is the correct answer.

The movement of the Ocean Conveyor Belt, starting with the northern Atlantic Ocean is: first cooling, high salinity water that travels to the northern Atlantic Ocean from the south, sinks to the bottom of the ocean. To make room it pushes the existing water down towards Antartica (option C).

The root is the part of the plant that anchors the plant to a substrate (like soil or another plant), absorbs water and minerals into the plant, and sometimes store starch. There are two types of root systems: taproot system (mostly seen in dicots) and fibrous root system (mostly seen in monocots).

Features of the roots:

• absorb water and ions , ,(1,3),

• anchorage ,(8)

• exerts force to move matter (water movement) ,(4)

• scaffolding for plant organs, ,(6)

The shoot is the visible part of the plant where the leaves and reproductive structures sprout and conduct photosynthesis.

Features of the shoots:

• photosynthesis ,(2)

• Uptake of carbon dioxide, ,(5)

• Origin of reproductive structures, (7)

To answer this question we need to remember quickly how a cell divides a cellular cycle, as we know the duplication of genetic material occurs in the S phase, meanwhile, the actual division of the cell occurs in the mitosis or meiosis (M phase), therefore if a cell divides before complete genetic duplication the are two possible scenarios, in the first, one cell receives the complete information and the other get incomplete information and is non-viable, the second is that both cells receive incomplete information, when genetic information is incomplete will never be recovered and in many cases the product is non-functional. Therefore we can say that the correct answer is option d.