Dinoflagellate is a type of neurotoxin which is found in the red-tide algae.
The answer is:
d. people can get paralytic shellfish poisoning during dinoflagellate blooms
Dinoflagellate algal blooms, during red-tide, release strong neurotoxins that can be ingested by shellfish and passed on to humans who eat the infected shellfish. The most significant public health problem that has been known to cause this harmful algae poisoning is: Amnesic Shellfish Poisoning (ASP).
The correct answer is d. People can get paralytic shellfish poisoning during dinoflagellate blooms because dinoflagellate blooms produce toxins that can accumulate in shellfish, leading to paralytic shellfish poisoning in humans.
The correct option is d. People can get paralytic shellfish poisoning during dinoflagellate blooms.
Reasons:
Dinoflagellates produce toxins that can accumulate in shellfish during algal blooms.When humans consume contaminated shellfish, they can suffer from paralytic shellfish poisoning because the toxins attack the nervous system.Symptoms of this poisoning include dizziness, nausea, slurred speech, loss of feeling, and uncoordinated movements, and it can even be fatal.Thus, dinoflagellate blooms are harmful to humans primarily because of the toxins they produce that accumulate in marine life and can cause severe health issues.
Can anyone help me? Make sure that the answer is correct.
i believe its b, dry and sandy
The answer is D.) because it has to be, because if the criniod swept onto shore it has to shallow
Which one of the following accurately describes the Lac operon? A. RNA polymerase is prevented from transcribing the lac genes when lactose is present. B. The repressor protein binds to the operator when lactose is present. C. The repressor is freed from the operator when lactose is present. D. RNA polymerase transcribes the lac genes when lactose isn't present
The correct answer is: C. The repressor is freed from the operator when lactose is present
The lac operon is found in bacteria (E. coli) and it contains genes involved in lactose metabolism which are expressed only when lactose is present and glucose is absent. Lac operon is regulated and can be turned on and off thanks to regulators: lac repressor and catabolite activator protein (CAP).
The lac repressor blocks transcription of the operon when there is no lactose (it binds to operator so RNA polymerase cannot bind to the promoter). When lactose is present, (repressor is a lactose sensor), the repressor is freed from the operator.
CAP, on the other hand, acts as a glucose sensor- activates transcription when glucose levels are low.
How do enzymes influence the amount of activation energy needed?
What your cells have to help overcome a problem of high activation energy are called enzymes. Enzymes are proteins that lower the activation energy of a reaction. In doing this, enzymes increase the rate of a reaction, helping it to occur faster. However, enzymes are not consumed in a reaction; they simply help it to occur.
Enzymes make things easier for your cells to work properly and help chemical reactions occur. There are hundreds of different kinds of enzymes in your cells, which all participate in different types of reactions. Enzymes can break molecules apart, build or add molecules, and even rearrange them.
In lowering the activation energy of a reaction, enzymes decrease the barrier to starting a reaction. It's important to note, however, that the change in energy remains the same between the start and end of a chemical reaction.
Enzymes are catalysts, they decrease activation energy to speed up reactions
4. The medium ground finch and the cactus finch are adapted to consume different types of foods. Can you think of a situation in which the medium ground finches would have a survival advantage over the cactus finches? A disadvantage?
Answer:
Long beaks of medium ground finches allows them to opt for alternate sources of food in times of extremities while this is not the case with the cactus finches.
Explanation:
The medium ground finches have larger beaks and thus apart from small seeds they can also break open the large seed. In case if the small seeds get scarce, a medium ground finch can still survive by taking advantage of feeding on alternate source of food but small beaked birds such as cactus finches shall die out of starvation.
This adaptation of medium ground finches gives it a survival advantage over the cactus finches
Answer:
Large beak size of medium ground finch assists in aiding advantage to survival and reproduction as compared to cactus finch.
Explanation:
The medium ground finch will take the advantage of its peak size and structure over the cactus finch for both its survival and reproduction.
Unlike the cactus finch, the medium finch have large beaks due to which they take advantage of alternate food sources such as large seeds, hard seeds etc.
Beak size also plays an essential role in attracting males with large beak size and hence medium ground finch reproduce easily and frequently as compared to cactus finch
List the five classes artropod with two examples of each and then explain if they can be eaten or not.
The five major classes of the artropods are:
- Insects;
Ex: ants; locusts;
Can be eaten. They contain lot of protein, and are easy to digest, especially if cooked.
- Crustaceans;
Ex: crabs; shrimps.
Can be eaten. They are a very popular dish around the world. the human body digests them without any problem, and they are very healthy.
- Centipedes;
Ex: scolopendra; stone centipedes;
Can not be eaten. They contain strong toxins and chemicals that the human body can not process.
- Millipedes;
Ex: julida; polydesmida;
Can not be eaten. As the centipedes, they too contain toxins and chemicals that are not good for the human body.
- Arachnids;
Ex: tarantula; wold spider;
Can be eaten. When cooked, they are easy to digest, and in general the human digestive system doesn't have problems with them.
why type of physical weathering is caused by the expansion of water?
Final answer:
Frost wedging, also known as freeze-thaw weathering, is the type of physical weathering caused when water freezes in the cracks of rocks, expanding and breaking the rock apart.
Explanation:
The type of physical weathering caused by the expansion of water is called frost wedging or freeze-thaw weathering. This occurs when water permeates cracks in rock or soil and then freezes, expanding and exerting a force that can fragment the rock. In the broader context of thermal stress, many materials, including water, expand when heated and contract when cooled. Water is unique in that it expands upon freezing, which is essential to the process of freeze-thaw weathering.
Examples of thermal stress impacts include roadways buckling due to a lack of sufficient expansion joints, and biological cells rupturing when foods are frozen. Conversely, large forces can result if materials that tend to expand on heating are restrained, potentially causing them to deform or break their container.
Table salt is the result of a(n) _____. covalent bond ionic bond hydrogen bond
Answer:
Ionic
Explanation:
Answer:
ionic bond
Explanation:
Table salt is also known as common salt with chemical formula NaCl. In this chemical compound the Na represents element sodium while Cl represents element chlorine. Both of these elements are bonded with each other with the help of ionic bond.
An ionic bond is formed when one atom looses its electron to form an ion with positive charge and another atom gains this electron and forms negatively charged ion. Since opposites attract, these two ions interact with each other to form a bond thereby achieving stability.
For example:
Na⁺ + Cl⁻ → NaCl
Here, an electron is being transferred from Na⁺ which is received by Cl⁻ thereby leading to the formation of ionic bond between sodium and chloride ion.
Microscopic thin-walled tubes carrying blood are called
A : Arterioles
B : Capillaries
C : Arteries
the answer is B. please let me know weather its right or wrong
Capillaries are the microscopic thin-walled tubes that carry blood.
Explanation:The correct answer is B: Capillaries. Capillaries are microscopic thin-walled tubes that carry blood between arterioles and venules. They are the smallest blood vessels in the body and play a vital role in the exchange of oxygen, carbon dioxide, nutrients, and waste products between the blood and surrounding tissues.
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Beginning with carbon fixation, arrange the steps of the Calvin cycle in the correct order.
Answer:
1-Carbon dioxide reacts with five carbon compound.
2-Formation of an unstable 6-carbon compound.
3-Formation of a stable 3-carbon compound.
4-Use of ATP to from a high energy 3-carbon compound.
5-Formation of glucose, which leaves the chloroplast.
6-Use of enzyme and ATP to from 5-carbon compound.
Explanation:
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During the gastrula stage of embryo development, the cuplike opening becomes the mouth in _[blank]_.
placental mammals
chordates
deuterostomes
protostomes
Final answer:
During the gastrula stage of embryo development, the opening called the blastopore becomes the mouth in protostomes.
Explanation:
During the gastrula stage of embryo development, the cuplike opening, known as the blastopore, differentiates into either the mouth or anus, depending on the type of organism. In protostomes, this opening develops into the mouth, with the second opening becoming the anus. On the contrary, in deuterostomes, the blastopore becomes the anus, and the mouth develops at the opposite end of the gut. Given these patterns of development, the correct answer to the question, "During the gastrula stage of embryo development, the cuplike opening becomes the mouth in _[blank]_." is protostomes.
Which characteristic is shared by both cnidarians and flatworms?
A) dorsoventrally flattened bodies
B) flame cells
C) radial symmetry
D) a digestive system with a single opening
E) both A and D
Answer: The answer is D: a digestive system with a single opening.
Cnidarians and flatworms have a digestive system with a single opening.
Explanation: Cnidarians are species of aquatic animals. They are mostly marine organisms that live in both marine and freshwater where they get food. Their respiration and digestion takes place through one orifice and a body cavity.
Flatworms are simple soft-bodied invertebrate animals. Their bodies are not divided into segments. Flatworms depend on a large surface in order to allow oxygen and nutrition to diffuse into their bodies. They have a digestive system with a single opening. Their habitation are in marine, freshwater, and damp terrestrial environments.
Flatworms and cnidarians both have a digestive system with a single opening, hence option D is correct.
Aquatic animal species include cnidarians. They are mostly marine species that feed on both freshwater and saltwater. Through one orifice and a bodily cavity, they breathe and digest food.
Simple soft-bodied invertebrates with flat bodies are flatworms. There are no separate parts to their bodies. For oxygen and food to permeate into the bodies of flatworms, a sizable surface is necessary.
They have a single entrance in their digestive system. They live in areas with saltwater, freshwater, and moist land.
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The enzyme dna _______ chemically bonds together two dna strands and removes nicks in a dna duplex.
The enzyme DNA ligase chemically bonds together two DNA strands and removes nicks in a DNA duplex.
This enzyme is catalyzer for the formation of a phosphodiester bonds. Three major processes in which DNA ligases are involved are:
• DNA replication- after the RNA primers are removed, the remained nicks are replaced by the enzyme DNA ligase
• DNA repair-usually single-strand breaks are repaired by DNA ligase and complementary strand of the double helix is used as a template
• Recombination of DNA in experiments- in gene cloning, DNA ligase joins DNA molecules together to form recombinant DNA.
As the distance between a satellite in a circular orbit and the central object increases the period of the satellite
The period is the time it takes the satellite to make a complete orbit around the central object. As the distance increases, so does the period because the orbit becomes longer because the radius increases.
Hope this helps!!
Explanation:
Kepler has given its three laws. The third law of Kepler gives the relationship between the orbital period and the distance between the satellite and the center of orbit. Mathematically, it is given by :
[tex]T^2\propto a^3[/tex]
or
[tex]\dfrac{T^2}{a^3}=constant[/tex]
It is clear from above formula, that as the distance between a satellite in a circular orbit and the central object increases, the period of the satellite also increases.
Why do insectivorous plants trap insect while they also prepare carbohydrate by photosynthesis
But carnivorous plants often live in "awful", nutrient-poor places. In other words, very nutrient scarce environments where they're very boggy, so most of the nutrients have probably been leached away by water. As a result, the soil is so poor that many of those trace elements that keep plants growing normally, just aren't available in appreciable amounts. So the plants need to look to the air to obtain that nutrition and they do it by catching insects because if they catch an insect, insects have got lots of iron, they've got lots of proteins, they've got lots of other micronutrients in them that the plants have adapted and evolved to make use of, and to supplement the poor source of things that are coming in through the soil.
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Which of the following statements about transmembrane proteins is correct?-They are always inserted with the amino terminus on the lumenal side and the carboxyl terminus in the cytosol.-They are always inserted with the carboxyl terminus on the lumenal side and the amino terminus in the cytosol.-The signal sequences are always cleaved off.-They usually have one or more helical regions spanning the membrane bilayer.-They can cross the membrane only once.
Answer:
They usually have one or more helical regions spanning the membrane bilayer
Explanation:
Transmembrane proteins are type of integral proteins meaning that they are permanently attached to biological membrane. Transmembrane proteins span through the plasma membrane so most of their structure is hydrophobic.
The major role of these proteins is transport role: they act as a channels that undergo conformational change in order to move a substance through the membrane.
Classified by their structure they can be put into two types: alpha helical and beta barrels.
External fertilization occurs mostly in _____.
A.) aquatic animals
B.) insects
C.) animals that reproduce asexually
D.) land animals
E.) mammals
A) Aquatic Animals
That should help you hope I helped
You just discovered a new organism while walking through the woods. Upon observation, you begin to determine this creature is a primary consumer. Which of these observation would prove your theory correct? Question 3 options: A. Your new organism feasted on a mushroom, but was then eaten by a hawk. B. Your new organism was eating the remains of a deceased bird. C. Your new organism at a succulent mouse who was nibbling on some grass. D. Your new organism was rooted in the ground and its petals point towards the sunlight.
Answer: C. Your new organism at a succulent mouse who was nibbling on some grass.
A food chain can be defined as a linear sequence in which one organism is consumed by another organism so as to sustain it's life. A primary consumer can be defined as the organism which is typically a herbivore which feeds upon the primary producers like plants and other autotrophs.
According to the situation given, a succulent mouse can be considered as primary consumer who was nibbling on some grass.
Definition: This is a type of reproduction where there is a exchange of genetic information in order to create new individuals.
The answer is sexual. hope it helps
According to the nebular hypothesis, when did nuclear fusion begin?
After the planets formed.
When the sun was 5 billion years old.
When the nebula first exploded outward into space.
When particles were pulled together so tightly they combined.
When particles were pulled together so tightly they combined.
Explanation;The solar nebular hypothesis describes the formation of our solar system from a nebula cloud made from a collection of dust and gas.It is believed that the sun, planets, moons, and asteroids were formed around the same time around 4.5 billion years ago from a nebula.According to this theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust.Answer:
The correct answer is "When particles were pulled together so tightly they combined".
Explanation:
The nebular hypothesis is the most accepted hypothesis about how the Solar System was created. According to this hypothesis a nebula collapsed and created the particles that later formed the Solar System. First the gravitation force put the particles close to each other. Later, nuclear fusion began when particles were pulled together so tightly they combined and sufficient temperature and pressure was achieved.
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From the list below, select four types of agricultural research that could lead to more sustainable farming.
the improvement of nutritional quality
the storage of crops
economic resources
farming without funding
the building of tractor parts
the study of ancient tools
the use of pesticides
the production of crops
the marketing of crops
The improvement of nutritional quality, economic resources, the production of crops, and the marketing of crops.
The improvement of nutritional quality will help make better crops so that they turn out beautiful.
Economic resources helps make the crops so that you have a ton of crops.
The production of crops will help with more sustainable farming.
The marketing of crops will help you with getting money and to afford for making more crops next year.
The four types of agricultural research that could lead to more sustainable farming are given below:
The improvement of nutritional quality.Economic resources. The production of crops. The marketing of crops. What is sustainable farming?Sustainable farming may be defined as a methodology that strives to support farmers, resources, and communities by encouraging farming approaches and strategies that are beneficial, environmentally valuable, and adequate for communities.
Therefore, it is well described above.
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Which of the following does NOT describe a basic regulator of digestive control?-Short reflexes act locally in the GI tract.-pH, stretch, and osmolarity are some of the inputs that can initiate digestive responses.-conscious neural control-Digestive effectors are smooth muscle and glands.
Answer:
conscious neural control
Explanation:
Neural control of digestive tract is unconscious achieved via the autonomic nervous system.
Local nervous system of the digestive system is called the enteric or intrinsic nervous system. The major components of this nervous system are two networks or plexuses of neurons:
• The myenteric plexus – controls digestive tract motility
• The submucous plexus - regulates gastrointestinal blood flow and controls epithelial cell function.
A hunter tells his doctor that he's been feeling fatigue, headaches, and dizziness for the past two weeks. upon examination, the doctor notices the man has a red rash on his leg that has a red center surrounded by rings of lighter red. which disease does the doctor suspect?
That would be Lyme Disease
Which of these accurately describes Newton’s third law?
A. The relationship among mass, acceleration and net force.
B. The stronger the net force acting upon an object, the greater the acceleration of the object.
C. An object in motion stays in motion, and an object at rest stays at rest, unless an unbalanced force acts upon it.
D. For every action force, there is an equal and opposite reaction force.
The answer is d I hope this helps
Newton's third law is accurately described by 'For every action force, there is an equal and opposite reaction force,' illustrating the mutual interaction between two objects where forces are applied.
The correct answer that accurately describes Newton's third law is D: For every action force, there is an equal and opposite reaction force. This law highlights the interaction between two objects: when one object exerts a force on a second object, the second object simultaneously exerts a force back on the first object of equal magnitude but in the opposite direction.
Newton's third law can be observed in various everyday scenarios, such as when you push against a wall, the wall pushes back against you with the same force. This law is an essential principle in understanding the nature of forces and how they interact to produce motion or maintain the status quo.
Hanges of motion are caused by A) all forces. B) strong forces. C) balanced forces. D) unbalanced forces.
D. unbalanced forces
Answer:
D. Unbalanced forces
Explanation:
Say you have a Box sitting on the ground. If you have two people pushing the box with the same amount of force, its not going to go anywhere. But if you have two people pushing it with unequal amounts of force, the box will go towards the person with the weaker side because there is more force going against it.
Which of the following correctly identifies body structures made of a collection of tissues?
organs
organ systems
super tissues
cells
Tissues make up organs
Answer: organs
Explanation: If we take into consideration the structure of the human body we can say that the cells are the smallest biological units. A combination of cells form tissue. The different organs of the body are made of tissue and a group of organs is an organ system. So, a structure made up by a combination of tissues is an organ.
The dermis is the _[blank]_ of the skin.
thinner outer layer
thicker outer layer
thinner inner layer
thicker inner layer
Thinner outer layer
Answer:
thicker inner layer
Explanation:
The dermis is the thickest layer of the skin that is found below the epidermis and above the hypodermis and it gives strength to the skin. Also, it provides protection against trauma. According to this, the answer is that the dermis is the thicker inner layer of the skin.
the part of your brain that is responsible for answering this question is the?
The neocortex, responsible for higher-order cognition, is the part of the brain that enables you to answer questions. It handles complex behavior, language, and spatial reasoning.
The part of the brain responsible for answering this question is the neocortex. The neocortex is the newest part of the brain in evolutionary terms and is responsible for higher-order cognition, such as thinking, understanding, and decision-making. It encompasses the functions of complex behavior, language, and spatial reasoning, all of which are essential for processing and formulating an answer to a question.How do cells maintain water balance through osmosis?
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A device used to clean exhaust gasses before they exit the cars tailpipe is called?
The catalytic converter
Catalytic converters, preheated to maximize their efficiency, are the devices used to clean exhaust gases in cars by converting carbon compounds to carbon dioxide and reducing nitrogen oxides.
Explanation:The device used to clean exhaust gases before they exit the car's tailpipe is called a catalytic converter. Catalytic converters are used in automobiles to reduce the amount of toxic emissions produced by burning gasoline in internal combustion engines.
They work by utilizing a carefully selected blend of catalytically active metals to effect complete combustion of all carbon-containing compounds to carbon dioxide while also reducing the output of nitrogen oxides. This is achieved through two processes, one that involves adding more oxygen to the molecule and the other that removes it.
To maximize efficiency, most catalytic converters are preheated by an electric heater even before the automobile exhaust is hot enough, ensuring that the metals in the catalyst are fully active and able to perform the necessary reactions.
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Using what you learned about ecological interactions think of an example of each interaction in which humans are involved
a. Competition: Humans compete with all organisms for space.
b. Parasitism: Humans have many parasites: head lice, ticks, tapeworms, etc.
c. Mutualism: We have mutualistic relationships with all domesticated plants/animals.
d. Commensalism: Pigeons thrive in metropolitan ecosystems without really
affecting humans (except for being mildly disgusting).
Humans partake in various ecological interactions such as predation when hunting, competition for resources like land, mutualism through agriculture, and parasitism under sickness.
Explanation:In regard to ecological interactions, humans are intricately involved in different ways. For example, in predation, humans serve as predators when they hunt animals and fish for food. This is an interaction where one organism (the predator) kills and eats another (the prey).
Regarding competition, humans compete with other species for resources such as land, which many other species are also reliant on for their habitats. In the context of mutualism, humans cultivate plants and gain food in return, such as in the case of fruit trees where humans take care of the trees, and in return, these trees provide fruits that humans consume.
For parasitism, an example can be seen in the relationship between humans and various harmful viruses and bacteria, as these microbes use human bodies to breed and nourish themselves, often causing illness in their human hosts.
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