This illustration shows a kind of animal that is a free-living organism. What is the common
name of this organism?

planarian

tapeworm

amoeba

fluke

Answer:

This sore is known as a chancre. Because this sore commonly occurs on the vulva, vagina, anus, or penis, syphilis most often is spread through sexual contact. The genital sores caused by syphilis also make it easier to become infected with and transmit HIV.

Explanation:

Genital Herpes and Chancroid are STIs that cause painful blisters or sores on the genitals, with Genital Herpes caused by a herpes virus and Chancroid by Haemophilus ducreyi.

Sexually Transmitted Infections (STIs) can present with various symptoms, including the occurrence of painful blisters. One such STI is Genital Herpes, which is caused by the herpes virus. Individuals with genital herpes experience painful blisters on the genitals that can reappear throughout one's lifetime. These outbreaks can be triggered by factors like stress and illness, and the likelihood of transmission is higher during these times. Another STI that results in genital sores is Chancroid, caused by Haemophilus ducreyi. It is characterized by soft, painful, open sores that may bleed or produce a highly contagious fluid

Answer:

Option (1).

Explanation:

Enzymes are the bio catalyst that increases the rate of biochemical reactions of the body. Enzymes are highly specific in nature and works at optimum temperature and pH conditions.

The enzymes work according to the lock and key mechanism. This mechanism explains that the active of enzyme should fit into the substrate in such a way as the key fits into its lock. Hence, this determines the complementary shapes of the substrate and enzyme.

Thus, the correct answer is option (1).

Answer:

You can check this calculation by setting the masses to 1 Sun and 1 Earth, and the distance to 1 astronomical unit (AU), which is the distance between the Earth and the Sun. You will see an orbital period close to the familiar 1 year.

Explanation:

Answer:

The orbital period of the planet is 6.16 years.

Explanation:

A planet has an average distance to the sun of 3.36 AU i.e. a = 3.36 AU

[tex]1\ AU=1.496\times 10^{11}\ m[/tex]

or [tex]3.36\ AU=3.36\times 1.496\times 10^{11}\ m[/tex]

i.e. average distance, [tex]a=5.02\times 10^{11}\ m[/tex]

If we want to calculate the orbital period of the planet, it can be calculated using Kepler's third law as :

[tex]T^2\propto a^3[/tex]

[tex]T^2=\dfrac{4\pi^2}{GM}a^3[/tex]

Where

M = mass of sun

G = universal gravitational constant

[tex]T^2=\dfrac{4\pi^2}{6.67\times 10^{-11}\times 1.98\times 10^{30}}\times (5.02\times 10^{11})^3[/tex]

[tex]T=\sqrt{(3.78\times 10^{16})}[/tex]

T = 194422220.952 seconds

Since, [tex]1\ Year=3.2\times 10^7\ seconds[/tex]

So, T = 194422220.952 seconds = 6.16 years

Hence, the orbital period of the planet is 6.16 years.

Answer: The role of water in metamorphism is determined by the independent variables rock pressure, temperature, water pressure, and the amount of water present.

Explanation:

Answer:

1) Water pressures lower than the rock pressure cause metamorphic reactions to run at lower temperatures.

2) Water facilitates the transfer of ions between minerals and within minerals, and therefore increases the rates at which metamorphic reactions take place.  So, while the water doesn’t necessarily change the outcome of a metamorphic process, it speeds the process up so metamorphism might take place over a shorter time period, or metamorphic processes that might not otherwise have had time to be completed are completed.

3) Water, especially hot water, can have elevated concentrations of dissolved substances, and therefore it is an important medium for moving certain elements around within the crust. So not only does water facilitate metamorphic reactions on a grain-to-grain basis, it also allows for the transportation of ions from one place to another. This is very important in hydrothermal processes, which are discussed toward the end of this chapter, and in the formation of mineral deposits.

Explanation:

Answer:

D. pseudopodia

Explanation:

The pseudopods are one of the modes of locomotion of unicellular organisms. The amoebas move forming a large pseudopod at the front of the cell, while the cytoplasm retracts from the back and repeats this process, or by extending and contracting several small pseudopods that, in contact with the substrate, allow displacement.

Answer:

Answer is D

Explanation:

I took the test

Since wind turbines take less space than solar panels and may be installed in fields with crops and cattle, a farmer may decide to install wind turbines rather than solar panels. So, the correct option is A.

Tall, tower-like devices called wind turbines are used to transform the kinetic energy of the wind into electrical energy. They typically consist of a nacelle (or housing), a tower, and a rotor (or blades).

A wind turbine is built with blades that are intended to harness wind energy and turn the rotor. The generator in the nacelle is connected to the shaft that the rotor is attached to. The generator is turned as the rotor revolves, transforming kinetic energy into electrical energy. The rotor and nacelle are supported by the tower, which also raises the blades high into the air to catch the wind.

Since wind turbines take less space than solar panels and may be installed in fields with crops and cattle, a farmer may decide to install wind turbines rather than solar panels.

Therefore, the correct option is A.

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Answer:

1.  Ggbb- grey hair, red eyes  ggBB- white hair, black eyes  ggbb- white hair, red eyes  GgBb- grey hair, black eyes

Explanation:

I don't know the rest but that's #1... sorry. That's as much as I can help you :(

This question isn't really finished, but bacterium are unicellular prokaryote.

I hope this helps?.. :S

Answer:

A virus attaches itself to cells and usually reprograms them to reproduce itself. Also, unlike bacteria, most viruses do cause disease. Some virus-caused diseases include the common cold, AIDS, herpes, and chickenpox

Explanation:

Answer:

A virus can not be cured, but it can be treated to be better.

A bacterium can be cured.

Explanation:

HOW DO I EXPLAIN THAT?!

Explanation:

The first part of the stem cell transplant process is called conditioning. During this time, you'll receive chemotherapy and/or radiation therapy to damage and possibly destroy your bone marrow. The stem cell transplant itself replaces the damaged bone marrow with healthy stem cells.

Answer:

when a new creature is made due to the cause of chemicals i believe

Explanation:

Mutations can occur by the cause of natural exposure of an organism to certain environmental factors, such as ultraviolet light and chemical carcinogens.

Explanation:

Bases on the structure of their mouth and the type of the skeleton, scientists have divided the fish into 3 main categories:

Lampreys:

Skates:

Answer:

What question.

Explanation:

You have to write your question for it to be answered

Answer: if I’m correct it’s deletion

Explanation:

Answer:

B. There is no genetic drift.

Explanation:

For a population to be in genetic balance it is necessary that, in this population, no genetic drift occurs. This can be explained through the Hardy-Weinberg balance.

According to the Hardy-Weinberg balance, for a population to reach genetic equilibrium, it is necessary that mutations do not occur in this population, natural selection does not occur, does not occur, does not occur gene flow, occurs random crosses and no genetic drift occurs.

Genetic drift is a term used to describe a suture that causes a strong change in the genotype of a population, resulting in a low genetic variability among individuals that will have to undergo selection pressure.

Answer:

(In genetic terms, a dominant trait is one that is phenotypically expressed in heterozygotes). A dominant trait is opposed to a recessive trait which is expressed only when two copies of the gene are present.

Explanation:

Answer:

Read the link below

Explanation:

Answer:

C) none of the species would survive

Explanation:

clam  only goes down to a pH of 4.5

Answer:

The correct answer is C) none of the species would survive

Explanation:

According to the given data, the minimum pH range in which an organism can survive is 4.5-5.0 and that is for clam and that maximum range an organism can live is between 7.0-9.5 which is for frog.  

Therefore according to data, no organism can live below pH 4.5 and above pH 9.5 or organism can only live between pH 4.5-9.5. So if the pH eastern U.S. lake drops to 4.2 than even clam will not able to survive in that lake.

This means the pH of the lake is too acidic for the survival of any species, therefore, the correct answer is C) None of the species would survive.

Answer:

iiiiiiiiii thank it's E!!!$!!!!!!!!!$$!$

Answer:

The answer is actually C

Explanation:

Just took the test

Answer: I believe it's either continents or sunspots I could be wrong

Explanation:

Answer:

(D). horizontal gene transfer.

Explanation:

HGT (horizontal gene transfer) is a process of lateral gene transfer, which involves transfer of genetic material between organisms other than from parent to offspring.

In prokaryotes, horizontal gene transfer occurs through conjugation, transduction, and transformation.

Thus, the correct answer is option D.

Answer:

D. horizontal gene transfer.

Explanation:

Option D. is the correct answer choice as I completed the same Penn Foster exam with a grade of 100%.

Answer: The correct answer is -

A. It has lost one electron.

Explanation:

NADPH acts as a reducing agent as it can donate electron to get converted to NADP+.

This means that NADP+ due to extra proton in its chemical structure, is an oxidised form of NADPH.

NADP+ is a significant molecule that is used in the movement of high energy electrons in several processes like photosynthesis.

Thus, when NADPH loses one electron, it produces NADP+.

NADPH differs from NADP+ in that it has gained one proton, transforming from its oxidized form (NADP+) to its reduced form (NADPH) through the addition of two electrons and one proton. Hence, the correct option is C.

NADPH differs from NADP+ in that it has gained one proton. This is because the reduction of NADP+ to NADPH involves the addition of two electrons and one proton. This process transforms NADP+, the oxidized form of the molecule, into NADPH, its reduced form. Essentially, NADPH holds more energy than NADP+ due to the gain of electrons and a proton, making it a crucial molecule in the photosynthetic process, where it acts as a carrier of electrons and protons.

1. Adaptive radiation

The adaptive radiation is an evolutionary process in which rapid diversification occurs from a single ancestral species. The reasons for such rapid diversification, thus development of new physical traits, can occur from multiple reasons, such as sudden climate change, change in the food sources, or extinction of other species. Most often it is a response where there are numerous niches in the food chain opened up and free for taking, so the organisms develop new traits quickly in order to take over those niches.

2. It is dated from about 605-600 million years ago

The first multi-cellular organisms have appeared around 600 million years ago, at least from what is known so far from the fossils and the evidence of activities left from the organisms. They were very simple organisms, and the closest we can compare to in the present are the bacteria. In order for these multi-cellular organisms to develop, around 2.9 billion years where needed, as the first single-cellular organisms appeared around 3.5 billion years ago.

Answer:

1. Adaptive radiation

The adaptive radiation is an evolutionary process in which rapid diversification occurs from a single ancestral species. The reasons for such rapid diversification, thus development of new physical traits, can occur from multiple reasons, such as sudden climate change, change in the food sources, or extinction of other species. Most often it is a response where there are numerous niches in the food chain opened up and free for taking, so the organisms develop new traits quickly in order to take over those niches.

2. It is dated from about 605-600 million years ago

The first multi-cellular organisms have appeared around 600 million years ago, at least from what is known so far from the fossils and the evidence of activities left from the organisms. They were very simple organisms, and the closest we can compare to in the present are the bacteria. In order for these multi-cellular organisms to develop, around 2.9 billion years where needed, as the first single-cellular organisms appeared around 3.5 billion years ago

Answer:

       Mutation rate is not a difference between a population showing exponential growth and a population showing logistic growth. Hope this helped :D

Answer:D

Explanation:

Google

Answer:

D) Radiation kills cancer cells and healthy cells

Explanation:

Design and conduct an experiment to investigate water's surface tension.

To investigate water's surface tension, you can design an experiment that involves observing how water behaves with different substances placed on its surface. Start by filling a small container, such as a shallow dish or a petri dish, with water.

Then, carefully place various small objects, such as paperclips, coins, or small pieces of paper, on the surface of the water one at a time and observe what happens. Measure the number of objects that the water's surface can support before they sink. Repeat the experiment with different liquids, such as oil or rubbing alcohol, to compare their surface tension properties with that of water.

The surface tension of water is a result of the cohesive forces between water molecules, which causes them to attract and hold together at the surface. This experiment allows you to observe how surface tension affects the ability of water to support objects on its surface and compare it to other liquids. By understanding surface tension, you gain insight into one of the unique properties of water that plays a crucial role in various natural phenomena, such as the behavior of water striders on the surface of ponds or the formation of droplets on leaves.

Answer:

4.543 billion years

Explanation:

The Earth is around 4.6 billion years old. earth has a slightly squashed sphere, measuring 7,973 miles (12,756 km) in the diameter at the equator.

The most powerful solar storms send coronal mass ejections (CMEs), containing charged particles, into space. If Earth happens to be in the path of a CME, the charged particles can slam into our atmosphere, disrupt satellites in orbit and even cause them to fail, and bathe high-flying airplanes with radiation.

Burning of fossil fuels is a major disruptor of the carbon cycle.

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Wild boars have established successfully in areas with warm climates.

Answer is third choice