Biology College

Microorganisms that cause disease are classified as _____.
A.pathogens
B.inorganic materials
C.thermal pollutants
D.organic materials

Answers

Answer 1
C is the answer, I believe 
Answer 2

Answer:

pathogens

Explanation:

Related Questions

What term is used to describe the biomechanical principle that allows an object to stay in motion?
a) inertia
b) speed
c) force
d) priory

Answers

c)force_________
_________

Predict the most likely outcome of culturing transformed e coli in the presence of tetracycline answer

Answers

E. coli are a species of bacteria. Like all bacteria, they have a round piece of DNA that contains most of their genetic information, but also plasmids, that contain some more. Plasmid can be passed on from bacterium to bacterium and they contain information for fighting antibiotics. Tetracycline is such an antibiotic. The process of putting a plasmid inside a bacterium is called transformation. So what the above sentence really says, is that a bacterium just got a plasmid that is probably holding the genetic information to produce proteins that fight antibiotics like tetracycline. While regular strains of E. coli might not be able to deal with tetracycline, transformed strains will probably be able to survive it. Hence, the culture will have live bacteria and the bacteria that have a plasmid against tetracycline will be favored and survive.

The transformed E. coli cell will grow even in the presence of tetracycline.

Recombination:

It is the process by which a DNA of interest is inserted into an organism.

To insure that cell  transformed or not, scientist put put an antibiotic resistance gene.This give transformed cell an ability to grow in a medium that contain antibiotics.Non - transformed cells will die.

Therefore, the transformed E. coli cell will grow even in the presence of tetracycline.

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A theoretical protein, blue2, is coded for by the blu2 gene. This protein codes for a blue pigment used by the organism to protect it from damaging UV rays from sunlight. The enzyme alterase binding to the blu2 operator halts transcription of blue2. A blu2 operator mutation causes a conformational change that does not allow alterase to bind to operator.

Answers

The question is:
What may be observed as a result of the described mutation in an individual? 

1) Skin cancer due to UV rays 
2) Darker blue pigmentation 
3) A lack of alterase for other functions it may serve 
4) The release of a different pigment color

The correct answer is B.
In this theoretical molecular cascade, we have three key parts, the blue2 gene, the blue2 operator and the enzyme alterase.
The enzyme alterase stops the expression of the blue2 gene by binding  to its operator, and therefore the blue pigment protein.
The blue2 operator has a specific binding spot for alterase. If this binding spot is changed due to a conformational change, the alterase would not be able to bind to the operator and the blue2 gene could express undisturbedly, resulting in increased concentration of the blue pigment protein.

The parents of a 6-year-old tell the school nurse that they are worried that their child will fall behind other children academically because they are not able to afford expensive toys like computer games and handheld electronic devices. which are acceptable responses by the nurse? select all that apply.

Answers

"I understand how this can be frustrating, but rest assured this does not place your child at a disadvantage academically."

"All of these expensive toys that are advertised and purchased by some people are not necessary for preschoolers. Simple toys like chalk and Legos are great."
"Do you play with your child and provide means of play through things like dolls, puzzles, crayons, and Play-Doh? These are the types of toys suggested for preschoolers."

Expensive and elaborate toys do not place a child at an academic or developmental advantage. Simple toys that require interactive rather than passive play, and that may include the involvement of the parent, are recommended to foster development.

Answer:

The nurse should say that expensive toys are not a factor responsible for the good academic development of preschoolers. She should also mention that there are simple and inexpensive toys that are perfect for children at this age. Lastly, the nurse should indicate which toys parents could buy for this child such as dolls, puzzles, crayons and Play-Doh.

Explanation:

Some educational toys help stimulate the senses and develop children's skills, for example by getting them to come to conclusions on their own. They can (and should) begin to be used even at preschool age as it is during this time that little ones begin to develop cognitive, physical and social aspects. These toys, however, need not be expensive and far-fetched. Simple toys like lego, puzzle, color pencils are great options for this.

Many of the drugs of abuse share the tendency to increase levels of which neurotransmitter in the brain?​

Answers

Drugs of abuse such as methamphetamine and morphine increase the levels of dopamine in the central nervous system. Dopamine has a variety of functions but functions mainly in motivation and reward mechanism. People doing drugs of abuse create a pleasurable sensation in which there is a dopamine surge every time they use drugs. In the absence of drugs, the body "looks" for the pleasure thereby causing the person to be drug-dependent and addicted.

Answer:

Dopamine

Explanation:

Drugs of abuse that are commonly abused by people are alcohol, cocaine, MA, heroin, marijuana, nicotine.Most of these drugs increase the level of dopamine in the brain.Dopamine is an amine neurotransmitter which generates feelings of pleasure and thus creates a sense of euphoria.Further, this neurotransmitter is also responsible for reward behavior and thus generates a feeling of satisfaction in the abuser.

What would happen if the membrane of a nucleus became permeable to most substances?

Answers

The nucleus would be damaged.

Hope this helps!
~~Layshia!<3!

the nucleus would be damaged

Including all of the relevant anatomical structures (and ending with the activation of the cranial nerve), explain how we sense spinning in a chair. what happens when the chair is suddenly stopped

Answers

There are three semicircular canals filled with fluid in the inner ear at right angles to each other. Each senses the movement of your head along a different axis. Using all three, the brain is able to orient your body in 3D space. Tiny hairs lining the canals (hair cells) sense motion by sloshing of the water in the canals. Information from the hair cells are relayed to the brain as an interpretation of movement of the head.
During spinning in a circle, the fluid in the canals initially slosh in the direction opposite to your head's motion. However, the jelly-like material in which the hair cells are imbedded, the endolymph, adjusts to the movement of your head,causing the hair cells to straighten, and your brain no longer receives the message that you're spinning. In effect, your brain thinks that you are standing still while the the world is rotating around you. 
When you suddenly stop spinning, because of inertia, the endolymph keeps spinning. The fluid in your ear moves again in the direction in which you were spinning before, and a signal of movement is transmitted to the brain. You sense that you are moving, but you're not.  

An aneurysm is a traveling blood clot that becomes lodged in the brain. an aneurysm is a traveling blood clot that becomes lodged in the brain.
a. True
b. False

Answers

A blood clot is typically an embolism of some type. What happens is often plaque or some matter will build up in an area of your body, often the femoral artery in your thigh. This plaque will dislodge and travel through your blood until it becomes lodged somewhere else, often in the small veins and capillaries within the brain. This will cause typically one of three things to happen. The clot will cause reduced blood flow to a certain area causing an ischemic infarction or ischemic stroke. Depending on the area this can cause paralysis, slurred speech, blindness, deafness... etc. Another thing that can happen is it can cause a hemorrhagic stroke or bleeding out. It literally rips the vein causing blood to burst into the surrounding tissue causing much damage. These are typically much worse then ischemic attacks. The third thing is the aneurysm. The clot will lodge and cause the smooth muscle tissue of the vein to balloon out in the particular area. Nearly always, if not discovered, this ballooning will burst and cause hemorrhagic damage to surrounding tissue.

The clot can also be a large group of platelets that coagulated to repair a damaged area and dislodged and become lodged in the brain. Hence blood 'clot'. 

In short, it's true.
Final answer:

An aneurysm is not a traveling blood clot that becomes lodged in the brain, but rather a bulge resulting from a weakness in the wall of a blood vessel. If a blood clot travels to the brain, this condition is generally referred to as a cerebrovascular accident, or stroke.

Explanation:

False, an aneurysm is not a traveling blood clot that becomes lodged in the brain. An aneurysm is actually a bulge or ballooning in a blood vessel, usually an artery, caused by a weakness in the blood vessel wall. This can happen in any blood vessel, including the brain, but it's often in the aorta or the brain.

On the other hand, a traveling clot that travels to the brain is referred to as a cerebrovascular accident, or stroke, and can cause serious damage or death. It's important to note that while an aneurysm can lead to a stroke if it bursts, the two are not the same thing.

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which part of the flower you eat when you eat an apple?

Answers

when you eat a apple your eating the hypanthium tissue it could also be the core but i dont know anyone who enjoys eating the core.

A series of measurements were made on four skulls (descriptions of the measurements can be found in the student exploration sheet). which is most likely a modern human skull?

Answers

This question is incomplete. The question gives a choice between four skulls: A, B, C and D. The skulls are compared in a table for: Cranium/face area ratio, face angle and foramen magnum ratio.

The cranium/face area ratio relates to the size of the cranium relative to the rest of the skull, and we would expect this ratio to be fairly large for a human. The face angle relates to human faces in relation to primate faces, which are less protruded forwards (i.e., we have relatively flat faces), and the foramen magnum is the hole in the base of the skull through which the spinal column connects to the skull. In bipeds, we would expect this hole to be fairly equally distant from the back of the skull to the front of the skull, so this ratio would be closer to 1. Based on this information and the ratios given in the table, I would say that skull B is most likely a human skull.

~~8. a horticulturist has a purple plant and a white plant. the horticulturist knows that purple is dominant over white. when they are bred, all of the resulting offspring are purple. what is the most likely genotype of the parent or original purple plant

Answers

the purple allele(P) - dominant
white allele (p) - recessive 
for the recessive allele to be expressed, both alleles should be recessive. The white plant therefore should have both p alleles. Genotype of white plant is pp.

the other parent is a purple plant. For the dominant allele to be expressed, at least one of the alleles should be P. Therefore genotype of the purple plant should have one P allele. the other allele needs to be determined.

For all the offspring, they receive one p allele from the white plant, since they are purple the other allele should be P.Genotypes of offspring should be Pp. For all the offspring to receive P from purple plant then purple plant should be homozygous PP, to give only P alleles.


Therefore genotype of parent purple plant is PP. 

What controls the timing of gene expression?
a. the regulatory sequence for a gene
b. the nucleotides that dictate the sequence of amino acids in the protein
c. the coding sequence for a gene
d. the alleles for a gene
e. the transgenic portion of a gene?

Answers

The regulatory sequence for a gene controls the timing of gene expression.

Density differences in ocean water are responsible for deep ocean circulation. a. true b. false

Answers

the answer bnb is true becuase without desity in anything nothing would circulate

Which of the following best describes how a cell’s DNA can change through mutations?
DNA segments from broken-down prokaryotic cells are taken in and incorporated into the DNA of living cells.
A virus takes in a segment of DNA from one bacterial cell and inserts it into another bacterial cell.




A bridgelike connection forms between two prokaryotic cells, through which genetic information is transferred.
Changes in a cell’s DNA sequences occur during replication, and those changes are passed on to daughter cells.

Answers

Changes in a cell’s DNA sequences occur during replication, and those changes are passed on to daughter cells. 

Changes in a cell’s DNA sequences so the answer is D

what are the differences between protists and fungi

Answers

I hope this help you.
Final answer:

Protists and fungi are both eukaryotic, but they differ in cell wall composition and motility. Fungus-like protists have cellulose cell walls and can be motile, unlike fungi which have chitin cell walls and are mainly non-motile.

Explanation:

The differences between protists and fungi are found in their cellular structures and modes of nutrition. Both are eukaryotic organisms, which means they have a true nucleus. Fungus-like protists, such as slime molds and water molds, share some similarities with fungi; for instance, they are heterotrophic, have cell walls, and reproduce through spores. However, their cell walls are composed of cellulose, unlike the chitin found in fungal cell walls. Furthermore, while fungi are strictly heterotrophic and mainly non-motile, fungus-like protists can be motile during certain life stages and have more complex life cycles, which include both asexual and sexual reproduction.

The cranial remains from dmanisi bear some similarities to early homo specimens from africa but also bear some similarities to homo erectus specimens.
a. True
b. False

Answers

This is false.
The fossil remains from Dmanisi bear some similarities to early Homo specimens from Africa only.

"dormant phase, triggering phase, execution phase and __________ phase."

Answers

Answer:

A man is exposed to a high amount of ultraviolet light. The light causes DNA in the cells of his eyes to suffer many mutations. His doctor claims that the mutations will not be passed to any future offspring. Which argument BEST describes the doctor's claim?

Explanation:

Which of these belongs to the class of drugs called ampakines? g?

Answers

If your choices are the following:
A)Adderall
B)Chantix
C)Ritalin
D)Modafini

The answer is Chantix. It is a prescription medication used to treat nicotine addiction.

Answering the question, Modafinil belongs to the class of drugs called ampakines

Ampakines are categories of drugs developed by RespireRx. These drugs regulate neurotransmitters in the brain. It is used to treat different type of illness which includes Alzheimer's disease, Parkinson's disease, and many others.

Further Explanation

Modafinil is the type of drug that is used for people that has a sleep disorder known as Hypersomnia.  

Hypersomnia is also known as excessive sleepiness. A person that is experiencing hypersomnia would find it difficult to cope with their daily activities because they can fall asleep anywhere and anytime, they can fall asleep while driving or at work.

However, Modafinil is meant to improve sleeplessness in people that are experiencing excessive sleepiness. Modafinil can only reduce patient sleepiness; it cannot completely cure it.

This drug is administered orally and has some side effects.

Some of the side effects of Modafinil include:

It can cause shortness of breath It can cause fever and skin rash It can cause difficulties in swallowing It can also cause dizziness and stuffy nose

This drug is not advisable to be used in place of getting enough sleep and can only be taken once in a day.

Therefore, Modafinil belongs to the class of drugs called ampakines

LEARN MORE:

Which of these belongs to the class of drugs called ampakines? https://brainly.com/question/9038548If the FDA enacts more stringent pharmaceutical drug tests, two costs of this policy would be: https://brainly.com/question/13294633

KEYWORDS:

ampakinesdrugsbrainmodafinilrespirerx

is a banana more closely related to a lemon or an onion

Answers

Onion 

hope this helps
A banana is more closely related to an onion actually.

Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. mc003-1.jpg Which is the most likely cause of the observed variation? differences in the climate among the islands competition among individuals for available food sources competition among individuals for desirable mates differences in egg size among the populations

Answers

Competition among individuals for available food sources

The answer is;   competition among individuals for available food sources

Due to competition among the finch birds, individual were forced to move to different islands that make up the Galapagos and develop a niche. The finches that became adapted to eating larger fruits developed larger beaks over time while those that eat small fruits retained smaller beaks.  


Which best describes the reticular formation of the brain? it is primarily responsible for learning and emotional experience it integrates information from all regions of the cns and supports consciousness it is the primary synaptic relay station for sensory information entering the cns it is mainly involved in motor coordination and balance?

Answers

The reticular formation is a group of neuronal cell bodies or nuclei in the brainstem. The main function of the reticular formation is to form wakefulness and arousability which is defined by the ascending reticular activating system (ARAS); and along with the cerebral cortex, will produce consciousness. Since it is a collection of neuronal cell bodies, it also functions to integrate information from all regions of the CNS, along with the thalamus. Hence the correct answer is it integrates information from all regions of the CNS and supports consciousness.

Using technology, scientists are now able to use genetic information to classify new species. What is the likely impact of this advancement on the classification system?
The existing classification system may change to accommodate the new information.
The existing classification system will be replaced completely.
Organisms would be classified based only on their mode of nutrition.
Organisms would be classified based only on physical characteristics.

Answers

Answer:

A

Explanation:

The likely impact of this advancement on the classification system is the existing classification system may change to accommodate the new information. Thus, option A is correct.

What is the problem in the Linnaean taxonomy?

Linnaean category has been old primarily based totally on our modern know how of the evolution of lifestyles. It has a way of classifying organisms primarily based totally on tendencies and traits of them that we discover important; it is totally subjective.

The three-domain system has the organic category added via way of means of Carl Woese et al. in 1990 that divides cell lifestyles paperwork into archaea, bacteria, and eukaryote domains. The key distinction from in advance classifications is the splitting of archaea from bacteria.

Therefore, The likely impact of this advancement on the classification system is the existing classification system may change to accommodate the new information. Thus, option A is correct.

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Would you expect the salinity of the ocean to be high or low in a rainy region near the mouth of a river?

Answers

I would expect the salinity to be low. The rainy regions will feed a lot of fresh water to the river that drains into the ocean. This water will dilute the salty waters at the mouth of the river. This is one of the reasons why the salinity of brackish water varies over seasons influenced by the amount of fresh water brought in by the inland river.






What are the differences between the three basic cell types: prokaryote, animal, and plant?

Answers

Prokaryotes don’t have organelles (which are the cell’s ‘organs’ that carry out the cells functions).
Plant cells and animal cells are eukaryotes because they have organelles.
Plant cells are kind of stiff because of their structure. They have a cell wall, which is really tough. Also, plant cells perform photosynthesis, using an organelle called a chloroplast. Finally, plant cells have a large vacuole that stores the cells waste.
Animal cells, unlike plant cells, lack a cell wall. That means they’re free to wiggle if they wanted to. Animal cells have lysosomes that assist in reproduction.

prokaryotic cell does not have true nucleus and other organelle while animal and plant cell are eukaryotic cell which shows true nucleus and other organelle.

what are the characteristic features of prokaryotic cell ?

Prokaryotic cells are single-celled microorganisms which include Bacteria and Archaea while other photosynthetic prokaryotes are cyanobacteria perform photosynthesis.

A prokaryotic cell has single membrane and  all the metabolic reactions occur within the cytoplasm,  free-living or parasites in nature, lack nuclear membrane.

In prokaryotes Mitochondria, Golgi bodies, chloroplast, and lysosomes are absent, whereas genetic material is present as a single chromosome;

As eukaryotic chromosome have histone protein, prokaryotic chromosome does not have it,  cell wall is composed of carbohydrates and amino acids, plasma membrane carrying respiratory enzymes like mitochondrial membrane.

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Which summarizes the products of glycolysis? ATP, NADH, and pyruvic acid ATP, CO2, and pyruvic acid glucose, ATP, and NADH NAD+, NADH, and ADP

Answers

ATP, NADH, and pyruvic acid are the correct

The formula of glycosis is glucose + 2 NAD+ + 2 ADP + 2 Pi --> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O.

What is glycolysis?

The process by which glucose is broken down into energy is called glycolysis. It produces two atoms of pyruvate, ATP, NADH, and water. Oxygen is not required for the process, which takes place in the cytoplasm of a cell. Both aerobic and anaerobic organisms are affected.

In all organisms, glycolysis is the first step in cellular respiration. The Krebs cycle follows glycolysis during aerobic respiration. Without even a trace of oxygen, the cells make limited quantities of ATP as glycolysis is trailed by maturation.

Therefore, glycolysis is the cellular respiration process that helps in generating ATP also called body currency.

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The characteristic "rotten egg" smell of many active volcanoes is derived from ________.

Answers

hydrogen sulfide gas

Volcanic gases are gases from volcanoes. These are gases trapped in the spaces between volcanic rocks. The sources of this gases are the recycled constituents of the earth mantle, assimilated constituent of earth crust and groundwater, earth atmosphere. The principal component of volcanic gases are water vapor, carbon dioxide, sulfur dioxide , hydrogen sulfide. Gases varies depending on the volcano, water vapor is the most common among the gases.


Which of the following statements is true about isotopes?

Answers

Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots isos and topos, meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table.
Final answer:

Isotopes are different forms of an element with the same number of protons but different numbers of neutrons. They may have different atomic masses but exhibit the same chemistry.

Explanation:

Isotopes are different forms of an element that have the same number of protons but a different number of neutrons. For example, carbon-12 and carbon-14 are isotopes of carbon. Carbon-12 has 6 protons and 6 neutrons, while carbon-14 has 6 protons and 8 neutrons. Isotopes can have different atomic masses but exhibit the same chemical properties because the number of protons and electrons remain the same.

1 identify and describe the six major processes involved in gastrointestinal activity.

Answers

These are the 6 major processes involved in the gastro intestinal tract:
1. Ingestion: this starts one food is placed on mouth. This occurs in the oral cavity where the food is chewed and mixed with saliva. 

2. Propulsion: this is the movement of the food from one area to the next area in the gastrointestinal tract. This is primarily done by peristaltic movement, where muscle of the esophagus contracts and relaxes to move the food.

3. Digestion: this occurs not only in the stomach. Before food reached the stomach it is mechanically digested in the mouth.

4. Chemical digestion is done by  stomach by using enzymes and acids to breakdown food.

5.Absorption: Transport of digested products from the lumen of GIT to the bloodstream.

6. Defecation. This is the excretion of undigested food particle and considered as the waste product of the process.




Which of the following groups includes only fungus-like protists?

Answers

cellular slime molds, acellular slime molds, water molds.

Hope this helps!

-Payshence xoxo

Johnny is growing "tomatoes" in a light chamber in his dorm closet. some are given red light, some are given green light, and some are given blue light. under which color light will johnny's "tomatoes" show the greatest rate of growth?

Answers

I did this one before it will be Blue

Tomato plants grown under blue light will exhibit the greatest growth due to better absorption by chlorophyll used in photosynthesis, with red light being the second best for promoting growth and flowering, and green light the least effective for growth.

Chlorophyll a and b, which are found in tomato plants, absorb light most efficiently in the blue and red portions of the spectrum, with blue light being particularly good for promoting leafy growth. Green light, on the other hand, is less efficient for photosynthesis since it is reflected by the plants rather than absorbed.

Therefore, in Johnny's experiment with growing tomatoes under different colored lights, the plants grown under blue light (Plant A) would likely show the greatest rate of growth, followed by those grown under red light (not mentioned in the original question but generally known to promote growth and flowering), and finally those grown under green light (Plant B), which will show the least growth. Plant C, which is grown under orange light, may experience some growth due to the presence of red wavelengths in orange light, but likely less than plants under blue light. In summary, the predicted order from most growth to least growth would be blue light, red/orange light, then green light.

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