12. The activity of all human body systems is coordinated by (1) the secretion of hormones and the nervous system (2) the interaction of nerve impulses with the excretory system (3) the movement of digested food by the circulatory system (4) the secretion of hormones and the circulatory system​

Answer:

It is possible for a perfect flower to be incomplete, but it is not possible for an imperfect flower to be complete.

Explanation:

A flower with male and female parts is called a perfect flower. A flower that is missing male or female parts is an imperfect flower. Plants may have flowers that are complete or incomplete.

Answer:

(C.) using solar panels for heat

Explanation:

k 12 quiz

Having a large yard is an example of something that can promote sustainable development. Thus, the correct option is D.

Sustainable development is an organizing principle for the meeting of the human development goals while it is also sustaining the ability of the natural systems to provide the natural resources and ecosystem services on which the human economies and society depends as a whole.

A yard is an open place which has fencing around it, with the grasses and small shrubs around as well. Having a large yard will not only meet the requirements of the human beings however it also be in favor of the environment as there will be no construction over that area due to the yard.

Therefore, the correct option is D.

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A group of related parts with specific roles that work together converts the message to a signal and send it to a receiver.

The correct option is D.

The communication system describes an information conversation between different sites. Data is sent and received in communication. The three major parts of communication are the data transmitter, the channel or medium of communication, and the data receiver.

The telephone, the telegraph, the cell phone, the Edison telegraph, the computer, and the TV cable are the key examples of communication systems. This system's sources can be classified as either electric or non-electric. These are the places where a message or input signal comes from.

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The complete question is -

A system is a group of related parts with specific roles that work together to achieve an observed result. The flow chart below shows a communication system. In this communication system, what does the transmitter do?

We see a star's emission feature is 2 nm off from its actual emission at 450 nm. This star is traveling at a speed of 0.675×[tex]10^{8}[/tex] km/s relative to us.

As we define velocity as, v= Δh/h×C

Here c is the speed of light and the value of C is 3×[tex]10^{8}[/tex] m/sec.

(450× 3×[tex]10^{8}[/tex])/2

0.675 ×[tex]10^{8}[/tex]

Hence the rate of moving stare is 0.675 ×[tex]10^{8}[/tex] Km/s. and effect is known as the Doppler effect.

It is the result of a moving wave source that causes its upward shift in frequency for viewers as the source moves toward them and a drop shift in frequencies as the source moves away from them. used to determine if an object in space is traveling away from or toward us.

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Heat is also produced as a result of this reaction.

The process by which glucose is broken down to provide energy is known as glycolysis. It generates two pyruvate molecules, ATP, NADH, and water. There is no need for oxygen throughout the process, which occurs in the cytoplasm of a cell. Both aerobic and anaerobic creatures experience it.

Four ATP molecules (net = 2) are produced during glycolysis in addition to the pyruvic acid that is created.

However, glycolysis releases energy in the form of heat, much like all other catabolic reactions that involve the breakdown of big molecules.

Therefore, heat is also produced as a result of glycolytic reaction (cellular respiration).

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The statement "crossing over is the only mechanism that creates genetic variation by creating hybrid chromosomes with new combinations of alleles" is definitely true.

Crossing over may be defined as a type of process through which the exchange of genetic material occurs between non-sister chromatids of homologous chromosomes. This process mostly occurs in the Pachytene stage of meiosis I.

According to the question, independent assortment and random fertilization significantly construct genetic variations with the help of chromosome shuffling. There must be an exchange of genetic segments.

Therefore, the statement "crossing over is the only mechanism that creates genetic variation by creating hybrid chromosomes with new combinations of alleles" is definitely true.

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1.  nucleolus

2. ribosomes

3. mitochondria

4. lysosome

5. cell membrane

6. vesicle

7. cytoplasm

8. smooth ER

9. Golgi apparatus

10. cytoskeleton

11. nucleus

12. rough ER

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Monocytes(white blood cells) are the largest cells of the blood (averaging 15–18 μm in diameter), and they make up about 7 percent of the leukocytes.

Alveoli work with the villi to exchange oxygen and carbon dioxide .

Alveoli are the smallest structure in the respiratory system. They are organized in bunches all through the lungs at the finishes of the parts of your respiratory tree, which is the tree-like design of paths that carries air into the lungs.

The walls of the alveoli are extremely slender. This lets oxygen and CO2 pass effectively between the alveoli and vessels, which are tiny veins.

Oxygen can pass from the alveoli to the vessels on the grounds that the centralization of oxygen is lower in the vessels than in alveoli. Essentially, CO2 moves the alternate way in light of the fact that the centralization of carbon dioxide is lower in the alveoli than in the vessels.

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Menisci (articular discs) are the: (1) cavities lined with cartilage wedges of fibrocartilage that partially or completely divide the synovial cavity.

Cartilage is the connective tissue. It acts as a shock absorber therefore protects the bones and muscles. It is a very strong yet soft and flexible tissue. The cells that make up the cartilage are called chondrocytes. There are three types of cartilage. These are: hyaline, fibro and elastic.

Synovial cavity is the space between two bones. It is filled with a fluid called synovial fluid. Almost all the joints contain synovial cavity. The function of the cavity and fluid is to lubricate the ends of the bone and therefore protect them any wear or tear.

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Answer:

Eagle: Loves authority & power.

Peacock: Is the crowd-pleaser.

Owl: The 'numbers' guy (or girl)

Dove: The nurturer & helper.

Explanation:

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have a nice day

Answer:

red

Explanation:

The plant will never be able to flower.

What are annual Arabidopsis plants?

A plant is said to be annual if it completes all stages of its life cycle, from germination to the production of seeds, during a single growing season and then perishes when that season is over.

During the process of flower growth, from the vegetative to the reproductive phase, a number of genes, including SOC1, LFY, FLC, and others, play highly important roles. Which FLC gene is the repressor gene of SOC1 that result in the flowering of the plant, but after the cold treatment an additional gene called COLDAIR RNA in the process of vernalization represses FLC and causes flowering to occur. However, if COLDAIR RNA is unstable, it would be nonfunctional and the plant would never be able to flower because of this.

Hence, the plant will never be able to flower.

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When cells are not given glucose and oxygen, necrosis, or cell death, takes place. The fact that cells can endure hypoxia is noteworthy. The intrinsic apoptotic pathway is activated by acute oxygen deprivation, and this results in a lowering of the mitochondrial membrane's potential, according to early study.

When oxygenated blood is not given to cells, cellular membranes break down, causing anaerobic metabolism and a loss of adenosine triphosphate (ATP).

Since oxygen is needed for algae to break down, fish and other aquatic species have much less DO available to them, which has an adverse effect on their health and frequently results in fish death. Low DO in water is also brought on by the decomposition of aquatic plants and phytoplankton that are submerged.

Low oxygen levels in your bodily tissues are known as hypoxia.You may be at risk for hypoxia if you have one of several chronic heart and lung diseases. Hypoxia poses a serious risk to life.

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Fermentation is the process when some bacteria use lactose as a source of energy, they produce propionic acid and carbon dioxide.

Wine, beer, yogurt, and other goods are made through the process of fermentation. The chemical process that takes place during fermentation is seen below. A carbohydrate, such as starch or sugar, is transformed into an alcohol or an acid during the metabolic process of fermentation.

Glycolysis is the starting point of any type of cellular respiration, and the final byproduct is pyruvic acid, a 3-C molecule. Fermentation is one of two main methods by which various cells deal with this pyruvate. Let's take a close look at anaerobic respiration, kinds of fermentation, and so forth.

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Retrovirus has capability to synthesize sized single DNA from RNA template by the help of reverse transcriptase enzyme, that's why it is called retrovirus.

First, Capsid is broken down and released. Second, released viral RNA and ready to work as a temple for single strand DNA synthesis, these DNA enter within the host. Third, single strand DNA is integrated into the host chromosome. Fourth, viral m-RNA is transcribed from the Retrovirus DNA by using host machinery, along with this third step, reverse transcriptase enzymes synthesize second strand from DNA copy and virus store these genetic material as a viral genome.

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c is the correct answer

hope it helps

The answer to this fill in blanks is latissimus dorsi. The latissimus dorsi is the posterior axial muscle that crosses the glenohumeral joint.

The latissimus dorsi muscle is a broad, flat muscle that dominates the lower posterior thorax. The primary function of the muscle is in the upper extremity, but it is also considered a respiratory accessory muscle.

The latissimus dorsi is most activated during pulling and throwing movements. The most common causes of shoulder blade pain are overuse, poor technique, or failing to warm up before exercising.

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Answer:

Explanation:The posterior axial muscle that crosses the glenohumeral joint is the Latissimus Dorsi

The latissimus dorsi muscle may be a broad, flat muscle that occupies the bulk of the lower posterior thorax. The muscle's primary function is within the upper extremity but is also considered to be a respiratory accessory muscle. Due to this muscle's broad attachment on the spinous processes, ongoing research is watching what, if any, role the muscle plays in trunk movement.

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There are such high levels of speciation and extinction because conditions on the Earth keep on changing.

For a species to survive on the Earth, the conditions provided shall be suitable for it to exist. However, most of the times in an ecosystem, the conditions change when there is more competition for food and survival. Also, a rapid change in the ecosystem can cause a species to become extinct due to unfavorable conditions.

A species might have to move to another area if the conditions become unfavorable to survive. There might already be competing in the new area and hence the new species might not be able to survive.

Hence, the changing conditions of an ecosystem are the main reason for the high rates of speciation and extinction that constantly occur in the history of life on earth.

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The chemical equation for the reaction when a water molecule is added to an atp molecule to break down atp into adp and a phosphate group is H2O + ATP -> ADP + Pi

Adenosine triphosphate (ATP) is a molecule that can store chemical energy in high-energy phosphoanhydride bonds. These bonds can be split to release chemical energy, for example in muscles. This process is known as ATP hydrolysis. The end result is an inorganic phosphate and adenosine diphosphate (ADP) (Pi). Another inorganic phosphate, energy, and adenosine monophosphate (AMP) can all be produced from ADP by additional hydrolysis (Pi). The final step in converting food- or sun-derived energy into useful activities like muscle contraction, creating electrochemical gradients across membranes, and biosynthetic processes required for maintaining life, is ATP hydrolysis.

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The correct answer is option B: b-lymphocytes

b-lymphocytes are associated with secreting chemicals that kill invading organisms and infected cells.

B-lymphocytes are also called effectors as they kick out the invaders from the body. These are also known as protective cells, plasma cells, and effector B-cells.

In general, B-lymphocyte cells release chemicals called antibodies which are used as protective shields against harmful invading bacteria.

Their defensive mechanism is based on attachment or binding to the invaders i.e. bacteria and viruses and killing them and eliminating them instantly from the body before they cause any harm.

Moreover, these cells also prevent the proliferation of harmful microbes inside the body.

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Answer:

Here is answer

Explanation:

A root hair cell has a large surface area.

These features maximise absorption of water into the root from the soil.

The leaf cell has chloroplast because of these features the parts of cell can photosynthesis.

Answer:

I think we it has a hair I don't know

Answer: The combination of all of your variants make up the 0.1% difference in your DNA—the part of your DNA that makes you unique from everyone else—and helps give you a unique sequence.

Explanation: The gene copies are different when the nucleotide sequence differs in at least one site. For instance, a gene copy contains the A nucleotide in a specific location, while the other copy has the G nucleotide in the same place. We say that this person has two different alleles in the same location.

People differ in so many ways; in their genetic make-up, sociocultural backgrounds, attitudes, the way they speak, listen, learn, behave, act and react.

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All the true statements are:

This is further explained below.

Generally, The range of living things, including plants, animals, fungi, and even microscopic creatures like bacteria, that are found in a certain place is referred to as that region's biodiversity.

In conclusion, Biodiversity is an essential component of our natural world.

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CQ

Scientists agree that the term biodiversity describes the number and kinds of species in a location on Earth. Scientists have also identified alternate measures of biodiversity, some of which are important for planning how to preserve biodiversity including genetic biodiversity as well as ecosystem biodiversity. Because all life is interconnected and because the biosphere exerts such an influence on our man's presence on Earth, it is so very important that biodiversity be preserved.

Why is biodiversity important to man? Check all the statements that are true.

A) Maintaining genetic biodiversity of wild species of our crops that are related to domesticated species ensures our continued food supply.

B) Most aesthetically pleasing landscapes are poor in the diversity of habitats and species.

C)Antibiotics are derived from bacteria and fungi.

D)Many plants produce secondary plant compounds that are used as medicines.

E)The ability to create new crop varieties relies on the unique properties of just one particular plant rather than a genetic diversity.

F)Undisturbed wild areas are important for all human recreation activities.

Answer: transciped

Explanation: In order for a cell to manufacture these proteins, specific genes within its DNA must first be transcribed into molecules of mRNA; then, these transcripts must be translated into chains of amino acids, which later folded into fully functional proteins.

Answer:

Answer down below!

Explanation:

They need to be transcribed before they can become proteins!

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There are three layers called atmosphere, hydrosphere, and biosphere. The atmosphere is a layer of air. Polar ice reflecting the Sun's light toward space.

There are three layers called atmosphere, hydrosphere, and biosphere. The atmosphere is a layer of air. The hydrosphere is the layer of water. The biosphere is a layer of living organisms.

Polar ice reflects the sunlight. Polar ice will get melts when it will receive sunlight. Atmosphere is the layer around the earth made up of air. Hydrosphere is the layer of water only.

Therefore, There are three layers called atmosphere, hydrosphere, and biosphere. The atmosphere is a layer of air. Polar ice reflecting the Sun's light toward space.

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The two ways in which plant cells use the sugar made in photosynthesis are to supply the plant with energy for life and to make other types of organic molecules. The correct options are c and d.

Photosynthesis is a method that plants and other lifeforms use to transform light energy into chemical energy that can then be released to fuel the organism's activities via cellular respiration.

Plants use their leaves to trap light energy during photosynthesis. Plants use the sun's energy to convert water and carbon dioxide into glucose, a sugar.

Plants use glucose for energy and to make other substances such as cellulose and starch. Cellulose is used to construct cell walls.

Thus, c and d are the correct options.

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Embryos show a reduction and loss of body axis structures when Xenopus laevis eggs are exposed to 1.0 degrees C for 4 minutes or 8000 psi for 5 minutes during a crucial phase before initial cleavage. The deficits develop in a dose-dependent craniocaudal progression.

In the extreme, radial symmetric, completely axis-deficient embryos are produced. The time between pronuclear contact and mitosis, which is roughly when the gray crescent forms, is when the maximum sensitivity to cold and pressure occurs. This time spans from around 0.4 to 0.8. These findings are interpreted as follows: The Xenopus laevis egg contents are reorganized during the 0.4–0.8 phase in a way that is crucial for the development of the embryonic body axis later on.

Cytoskeletal components are involved in the reorganization process; some of these components are D2O-protected and susceptible to UV, pressure, and cold. It is possible to understand rescue by oblique orientation as the outcome of a gravity-driven rearrangement of the egg's contents, replacing the impaired normal mechanochemical reaction in treated Xenopus laevis eggs.

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