Which are examples of steroids? testosterone and trans fats cholesterol and phospholipids cholesterol and vitamin d estrogen and phospholipids description?
Answer:
Option C, cholesterol and vitamin d
Explanation:
Steroids are artificially produced hormone that acts as a natural hormone. These steroids are form of lipids as they are
a) Hydrophobic
b) Insoluble in water
Cholesterol and vitamin D are the most common steroids. Cholesterol is synthesized in the liver and it is precursor to vitamin D and other steroid hormones like estrogen, testosterone, and progesterone.
Thus, option C is correct
The bacteria in some foods are sterilized by placing the food near a source of ionizing radiation does that mean that the food becomes radioactive?
Answer:
No, the radiation energy use to sterilize the food is very low that cannot radioactivate the food.
Explanation:
The radiation that use to sterilize the food is mainly Ultraviolet radiation, it alters the DNA structure of microbes and microbes will die.
To radioactivate the food we need to disturb the nucleus of atoms which needs very high energy radiation like gamma radiation.
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Food irradiation using ionizing radiation such as cobalt-60 or cesium-137 kills harmful bacteria and extends shelf life without making the food itself radioactive. This process is endorsed by international health organizations and poses no measurable short-term risks to consumers.
Explanation:When food is irradiated by sources like cobalt-60 or cesium-137, it is exposed to ionizing radiation to kill harmful bacteria and extend shelf life. However, this does not mean the food becomes radioactive. The process involves ionization that creates free radicals and radiolytic products which disrupt bacterial cell membranes and prevent replication. Though concerns have been raised about the safety of radiolytic products, there have been no measurable short-term negative effects on consumers.
It is important to understand that the irradiated food does not come into direct contact with the radioactive material, thus preventing it from becoming radioactive. The safety of irradiated food is supported by endorsements for the treatment up to a million rad by respected organizations like the World Health Organization and the UN Food and Agricultural Organization. Comparisons of risk should also consider the hazards of traditional insecticides and preservatives.
In conclusion, the radiation method is a safe food preservation practice that does not make the food radioactive, and it should be weighed against the real and present dangers of foodborne illnesses and less desirable preservation practices.
Why is it important for plants and animals to adapt to their environment?
earth has an _______ of about 30 percent, reflecting much of the suns radiation back into space. apex
The correct answer for fill in the blanks is Albedo
The term albedo defines the proportion of radiation or incident ray that is reflected back by the surface. Earth has an albedo of about 30% reflecting back into the space. The rest 70% is absorbed by the earth. The values for albedo is changing as compared to last ice age. It is due the effect of human activities such as global warming, deforestation, pollution, etc.
Some organisms undergo asexual reproduction through mitosis, while others reproduce sexually, and their cells undergo meiosis to produce gametes. If there were drastic changes in temperature in an ecosystem, which process do you predict would be most beneficial to a species?
Answer:
Meiosis
Explanation:
Mitosis results in daughter cells with the same genetic component as the parent. Hence, a drastic change in the environment may wipe out the entire population of organisms that only reproduce by mitosis.
Meiosis results in daughter cells whose genetic components are different from one another and that of their parents. Crossing over and recombination ensures that meiosis increases the genetic variability of a population.
Hence, difference in genetic composition of organisms in a population might help in the survival of some members of the population in case of adverse environmental changes.
The amount of information that a neuron can receive increases with the number of _____ that the neuron has.
Answer:
Dendrites
Explanation:
Dendrites are thin and branched extensions, capable of conducting stimuli from other cells (or from environment) and directing them to the cell body, as if they were transmission cables of nerve impulses.
Dendrites extend together with axons throughout the body, connecting neuronal cell bodies to each other and to sensory, glandular, and muscle cells.
Thus, the greater the number of dendrites, the greater will be the amout of information that the neuron can receive.
Living things are made of six primary elements abbreviated chnops. what are these elements?
In the desert white rabbits are more easily seen by predators than brown rabbits. The difference in color causes white rabbits to be eaten by predators more often than their brown counterparts. This causes white rabbits to have a lower population because they do not survive to reproduce as often as brown rabbits. This scenario is an example of _____________.
a.
variation in traits
c.
genetic drift
b.
heredity
d.
differential reproduction
Final answer:
The correct answer is option d. differential reproduction. The scenario where white rabbits are more visible to predators and thus have a lower survival rate compared to brown rabbits is an example of differential reproduction, a key mechanism of evolution. Genetic drift and diversifying selection are other concepts relevant to changes in population genetics but are distinct from the selective pressure leading to differential reproduction.
Explanation:
The scenario described in the question, where white rabbits are more easily seen by predators than brown rabbits, leading to white rabbits having a lower survival rate and a lower chance to reproduce, is an example of differential reproduction. Differential reproduction is a key mechanism of evolution, where individuals with traits that are better suited to their environment tend to survive and reproduce more than those with less favorable traits. As a result, the traits that enhance survival and reproduction become more common in the population over time.
Genetic drift can also play a role in changing allele frequencies in a population, but it is a random process that is not directly related to a trait's influence on an organism's ability to survive and reproduce. Genetic drift can occur due to random sampling effects, such as when a few individuals colonize a new area (founder effect) or when a population size is drastically reduced (bottleneck effect), leading to a random shift in allele frequencies.
what is movement in biology for cells
Final answer:
Movement in biology refers to the ways cells move, which includes diffusion, mass flow, and movement as a result of chemical interactions.
Explanation:
Movement in biology refers to the various ways in which cells move. There are three basic ways in which materials are moved in organisms: diffusion, mass flow, and movement as a result of chemical interactions. Diffusion occurs when molecules move randomly due to their thermal energy. Mass flow refers to the movement of fluid materials like gases and liquids from areas of high pressure to low pressure. Lastly, movement as a result of chemical interactions involves forces developed by biological entities, such as motor proteins, which use chemical energy to do physical work.
A victim with a foreign-body airway obstruction becomes unresponsive. what is your first course of action
When a victim with a foreign-body airway obstruction becomes unresponsive, begin CPR starting with chest compressions and then call emergency services.
Explanation:In the case where a victim with a foreign-body airway obstruction becomes unresponsive, the first course of action that should be taken is to initiate the Cardiopulmonary Resuscitation (CPR) process, starting with chest compressions. The chest compressions can help to remove the obstruction and also start the circulation of blood that could have been discontinued as a result of the obstruction. Follow the standard process for CPR: Compressions, Airway, Breathing (CAB). This should be followed by calling emergency services immediately.
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An 8-year-old boy's foster mother is concerned about three recent cavities found in his permanent teeth and reports the child eats a nutritional diet, doesn't eat junk food, and the town water supply is fluoridated. which suggestion should the nurse prioritize to this mother in regard to the child's dental health?
how fast does sperm regenerate?
Which of these planes would show the heart, lungs, and liver in the same section?
To help you steady a rifle when you're ready to shoot draw a deep breath and
Yellow bananas are called triploid organisms. Why do you think this is?
yea...what the other guy said lol
A _____ is responsible for assessing where patients go once they are discharged from a medical setting.
Name four macromolecules present in all living things and identify what they have in common.
Water would be an example of __________, whereas the water cycle would be an example of __________
Water is a flow resource integral to life and a natural resource; the water cycle represents an ecosystem service that cycles water through the environment, supporting various services essential for human well-being and environmental health.
Water is a flow resource that is vital to all forms of life and is categorized as a natural resource. The water cycle, also known as the hydrologic cycle, is a crucial ecosystem service that describes the continuous distribution and movement of water in various forms throughout our planet. This cycle includes the evaporation of water, its transport across the atmosphere, and precipitation back to the earth's surface. The water cycle is driven by solar energy, ensuring the constant movement of water as long as the sun shines.
This natural process not only provides freshwater resources but is integral to other ecosystem services such as climate regulation, nutrient cycling, and flood control. Ecosystem services like the water cycle contribute directly and indirectly to human well-being by providing essential resources like fresh water and by maintaining the health of the ecosystems we rely on for food, fuel, and recreation.
It's essential to understand the interplay between abiotic factors, such as the atmosphere and water bodies, and biotic components, including plants and animals, in maintaining the balance and sustainability of these natural cycles. The soil productivity, which depends on the availability of water among other factors, showcases how these ecosystem services are of immense importance to agricultural production and to the overall health of our natural environment.
Therefore, Water would be an example of a resource, whereas the water cycle would be an example of an ecosystem service.
All the internal structures are suspended (floating) in what substance
A lily plant on a pond is an example of which food chain level? A. primary consumer B. decomposer C. producer D. 3rd tier consumer
The part of the neuron that receives messages from other neurons is called the
The dendrites are the structures on a neuron that receive messages from other neurons.
Explanation:The part of the neuron that receives messages from other neurons is called the dendrite. Dendrites are tree-like structures extending away from the neuron's cell body. Their primary function is to receive electrical signals at specialized junctions known as synapses, where contact is made with the axon terminals of other neurons. With their branched form, dendrites increase the surface area for receiving these signals, sometimes connecting a single neuron to thousands of others, facilitating complex neural communication.
Starch and cellulose _____. are structural components of the plant cell wall are used for energy storage in plants are cis-trans isomers of each other are polymers of glucose
Final answer:
The correct option is: are polymers of glucose. Starch is used for energy storage in plants, while cellulose is a structural component of the plant cell wall, both are polymers of glucose but with distinct structures and functions, and are not cis-trans isomers.
Explanation:
Starch and cellulose are both polymers of glucose. However, their functions and structures are distinct. Starch is primarily used for energy storage in plants and consists of two types of glucose polymers: linear amylose and branched amylopectin. In contrast, cellulose functions as a structural component of the plant cell wall and is a linear polymer with glucose units linked by ß-1,4-glycosidic bonds. They are not cis-trans isomers of each other since starch and cellulose have different glycosidic linkage orientations.
Mercury is an element that is toxic to humans in high doses. How can humans reduce their risk of ingesting this element in harmful amounts?
A.) Humans could avoid eating animals at high trophic levels, as their bodies contain more mercury than those at lower trophic levels.
B.) Humans could avoid eating herbivores, such as plant-eating fish, as their bodies contain relatively high amounts of mercury compared with other animals.
C.) Humans could avoid eating animals at all trophic levels, which all have equal risk of containing mercury, while consuming only plants.
D.) Humans could avoid eating plants, as these contain especially high levels of mercury.
Answer: B.) Humans could avoid eating herbivores, such as plant-eating fish, as their bodies contain relatively high amounts of mercury compared with other animals.
Explanation:
The mercury is a metallic poison which is used in chemicals production in the industries. The mercury along with other residues are left in the water bodies where this is consumed by the aquatic animals like herbivorous fishes. These fishes are consumed by human beings they become susceptible to the toxic effects of the mercury. A disease called as minamata is associated with the mercury consumption. It is associated with muscle weakness, numbness, hearing and speech damage.
The development period when the brain experiences the most growth and maturity is the:
The organelles that are the protein factories for the cell are the:
How does alcohol affect academic performance? select all that apply?
Which of the following would be used to control mice and rats?
insecticide
herbicide
fungicide
rodenticide
A patient is prescribed an opioid analgesic for chronic pain. which information should the nurse discuss with the patient to minimize the gi adverse effects
For lunch, you eat French fries at a new restaurant. Later that day you get the stomach flu and are vomiting all night. The next day, your friend offers you some French fries and you immediate feel nauseous. What component of classical conditioning does feeling nauseous represent?
A. conditioned response
B. conditioned stimulus
C. unconditioned response
D. unconditioned stimulus
Answer:
A. conditioned response
Explanation:
A classical conditioning reflex occurs when an association is established between normal response or normal body function and a new stimulus. In the given example, the physiologically meaningful stimulus is eating French fries at a new restaurant and represents the unconditioned stimulus. French fries offered by friends was conditioned stimulus that replaced the unconditioned stimulus. Vomiting at new restaurant as it occurred in response to unconditioned stimulus was an unconditioned response. However, feeling nauseous in response to conditioned stimulus represents the conditioned response.
A pet lizard and its shelter must be kept warm. What type of electromagnetic waves would most likely be used? gamma rays infrared light ultraviolet light microwaves
Answer:
Option B, Infrared Light
Explanation:
Infrared light is a long wavelength light with wavelength ranging from 700 nm to 1 mm. Being a long wavelength light, it is mostly responsible for making a surrounding warm just like the sun (which also emits infrared radiation). Thus, out of the given four options it is the infrared light which is capable to make the habitat of pet lizard warm.
Hence, the correct answer is option B
The type of electromagnetic wave that would most likely be used to keep the pet lizard and its shelter warm is infrared light.
What is electromagnetic wave?Electromagnetic waves are waves created as a result of vibrations between electric and magnetic field.
The type of electromagnetic waves we have are as follows:
radio wavesmicrowavesinfrared lightvisible lightultraviolet radiationX-raysgamma raysAmong these electromagnetic waves, infrared light provides warmth, hence, would most likely be used to keep the pet lizard and its shelter warm.
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