The term coined to signify a drop in testosterone levels in older men is:

Gap junctions are cell junctions that allow the direct passage of molecules, ions, and electrical signals from one animal cell's cytoplasm to another, through connexon channels formed by connexin proteins.

The cell junction that allows direct passage from one cell's cytoplasm to the next is known as a gap junction. Gap junctions are composed of connexons or hemichannels, which consist of six connexin proteins that pair up with connexons of adjacent cells. This unique connection facilitates the exchange of various molecules, ions, and electrical signals between cells, enabling them to communicate and coordinate their functions effectively. In contrast, plants have a similar structure called plasmodesmata which traverse the cell walls and allow for the movement of substances between the cytoplasm of adjacent plant cells.

Answer: Scanning electron microscope

Explanation:

The variable that is measured in an experiment, which reflects the potential effect of the independent variable, is referred to as the dependent variable.

The variable that was measured in Dr. Jenkins experiment is referred to as the dependent variable. In any experimental study, there are typically two kinds of variables: independent and dependent. The independent variable is the one that is manipulated or controlled by the researcher. In contrast, the dependent variable is what the researcher measures to see the effect of the independent variable. For instance, in a study exploring the effect of study hours on test scores, the amount of studying would be the independent variable (as it is what is being changed or controlled), while the test scores would be the dependent variable (as it is the outcome that is being measured).

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Correct answer: A). Law of Dominance

The Mendel's law of dominance states that when a cross is done between the parents that are true for characteristics traits, then under such a situation only one of the trait will be dominant and appear in the next generation, and the other will be hidden. It will appear in the trait that is dominant.

The alleles that are expressed in are called as dominant while the characteristics that do not got express is called a recessive trait.

Answer:

Halophiles are archaea and considered the lovers of saline or salt.

Explanation:

Halophiles are included under the domain archaea and considered as extremophile organism. Some halophiles are included in the bacteria laso but the major halophiles are the archae.

Halophiles are included in archae as they do not contain well defined nucleus, endomembrane system is absent and cell wall is not made of peptidoglyan layer. Halophiles has the ability to tolerate the extreme saline conditions. They can be found in he area that contains salt concentration five or six times greater than ocean.

The three different ways of heat transfer include radiation, conduction, and convection of heat energy.

There are three ways in which heat is transferred into and through the atmosphere including radiation, conduction, and convection.

Radiation is energy which comes from a source and travels through the space at the speed of light. This energy has an electric field and a magnetic field which are associated with it, and has wave-like properties.

Conduction is the process through which heat energy is transmitted through collisions of particles between neighboring atoms or molecules. Conduction occurs more readily in solids and liquids, where the particles are more closer together than in that of gases, where particles are further apart from each other.

Convection is the process of heat transfer through the bulk movement of molecules within fluids such as gases and liquid molecules. The initial heat transfer between the objects and the fluids takes place through conduction, however the bulk heat transfer happens due to the motion of fluid.

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As a result, the amount of energy delivered diminishes as we travel up the trophic levels. In the food chain, grass has the most energy and lions have the least. Thus, option B is correct.

The result is that the lowest quantity of energy is accessible to carnivores (secondary consumers) that feed on herbivores and detritivores, as well as those that devour other carnivores (tertiary consumers).

To create organic matter from carbon dioxide and water, producers like plants, algae, and cyanobacteria utilize the energy from sunshine.

A trophic pyramid is a basic interactional structure shared by all biological populations.

Therefore, High-quality energy is constantly converting to low-quality energy inside ecosystems.

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The cerebral cortex plays a major role in out emotions because it plays a role in the capability to identify and control emotions. The Cerebral Cortex is composed of tightly packed neurons and is the creased, outermost layer that surrounds the brain. It is also accountable for higher thought progressions including speech and decision making . The cortex is divided into four different lobes, the frontal, parietal,  temporal, and occipital, which are each responsible for giving out different types of sensory data. 

The starch that is obtained from bread, rice and potatoes is a complex carbohydrate. A complex carbohydrate are being turned to or formed into glucose in which is essential for an individual in order to have energy that is important in our every day activities.

Answer:

Robert Hooke

Explanation:

The cell was first discovered by Robert Hooke in 1665. He observed a slice of a cork cells under a crude or a primitive microscope. He observed the dead cells of a cork. For the first time, Leeuwenhoek in the year 1674 discovered the living cells in pond water for the first time with an improved microscope.

Answer:

Binary fission or bipartition is a way of asexual reproduction

Explanation:

Most bacteria depend on binary fission to spread. Conceptually, this process is simple; The cell simply needs to grow twice its size and then divides into two. But, in order to remain viable and competitive, the bacteria have to divide at their own time, in their own place, and they must provide each stem. The cell division of the bacteria is studied in many parts of the world. This research is revealing the genetic mechanisms that direct and regulate bacterial cell division. Understanding the mechanisms of these processes is of great interest because this allows the development of chemical products and new antibiotics aimed at interfering with the cell division of bacteria.

Before binary fission occurs, the cell must copy its genetic material (DNA) and deposit it at the ends of the cell, likewise copying the different types of proteins that the new cell division machinery will include.

A: The right answer is Vacuole

Vacuoles are organelles present in plant cells.  It is a large single structure, of variable shape according to the cells, delimited by a lipid membrane called tonoplast.

The vacuoles allow the storage of water, ions, sugars, ... and by magnifying, play an important role in the growth of the plant.

B: The right answer is Mitochondria

Mitochondria are organelles present in eukaryoptic cells. The mitochondrion is composed of a double membrane, the inner membrane being folded into mitochondrial ridges.

Mitochondria are the organelles that produce the energy of the cell. The mitochondria thus have a role of power station for the cell. They are the ones who perform cellular respiration.

C: The right answer is Cell membrane (the inside layer)

All cells (prokaryotic and eukaryotic) are separated from their environment by a palsmic membrane.

The plasma membrane is the line of demarcation between the cell and its environment (= envelope of the cell).

It determines what goes into the cell and what comes out of it. Like all biological membranes, the plasma membrane has a selective permeability, that is to say it is allowed to pass through certain substances more easily than others.

The plasma membrane consists of a double lipid layer in which proteins are inserted.

D: The right answer is Chloroplast

Chloroplasts are important organelles specific to plant cells. Chloroplasts appear green ... They contain chlorophyll, a pigment that captures solar energy.

Choroplasts perform photosynthesis, that is, they absorb sunlight and use it for the manufacture (synthesis) of organic compounds from carbon dioxide and water.

E: The right answer is Lysosome

The lysosome is a small spherical structure (a vesicle) delimited by a lipid membrane located in the cytoplasm of eukaryotic cells. The membrane contains ion channels (proton pumps) that allow the active entry of H + ions, in order to maintain an acid pH (between 3.5 and 5) within the lysosomal vesicle.

Lysosomes are organelles of eukaryotic cells that contain a mixture of digestive enzymes used to degrade macromolecules.

Lysosomes are considered the "stomach" of the cell.

F: The right answer is Endoplasmic reticulum

The endoplasmic reticulum are organelles of eukaryotes that extend throughout the cytoplasm (like a labyrinth). These are organelles that produce proteins and play a vital role in the development of the other membranes of the cell.