Which process of heat transfer makes milk boil?
Condensation
Convection
Evaporation
Radiation
Why do scientists study index fossils?
Final answer:
Index fossils are crucial for determining the geological age of rock layers and are used by paleontologists for biostratigraphic correlation and understanding evolutionary history.
Explanation:
Scientists study index fossils because they are indicative of specific intervals in geologic time. These fossils, because of their widespread distribution and short lived existence in the geological record, provide key information about the age of the rock layers in which they are found. For instance, Belemnites are cephalopods that lived during the Mesozoic era, and finding a Belemnite fossil can immediately suggest that the surrounding rocks are from the same era. Furthermore, the study of index fossils aids in the field of biostratigraphy, which allows paleontologists to correlate rock layers from different locations and understand the evolution of life through geologic time.
Which of the following describes a role that ribosomes assume in the production of proteins?
A)
Transports nutrients from inside the cell to the cell membrane to be used in making proteins.
B)
Produces energy for the cell to use during protein synthesis.
C)
Translates mRNA into a specific amino acid chain.
D)
Rids the cell of leftover amino acids once the proteins have been synthesized.
Answer:
C)
Translates mRNA into a specific amino acid chain.
Explanation:
which best describes what a refrigeration system would do
A refrigerator works by absorbing heat from its interior and expelling it outside, using a coolant that vaporizes to capture heat and then is compressed to release it. This process requires work, electrical energy, and follows the conservation of energy principle, where the coefficient of performance measures efficiency.
Explanation:A refrigeration system, such as that found in a household refrigerator or freezer, conducts heat transfer by absorbing heat from within its insulated compartment (in this context, referred to as the cold reservoir) and expelling it to the surrounding environment (the hot reservoir). The system operates by using a coolant, which has a boiling point lower than the freezing point of water. This coolant captures heat from the refrigerator's interior during the evaporation process causing it to vaporize. Afterward, it is compressed—which requires work (W)—and transferred through the condenser, where it releases the absorbed heat to the outside air.
The conservation of energy principle is respected throughout this process, as the work done on the coolant (which we observe as electricity usage on our bill) facilitates the transfer of thermal energy against the natural direction of flow (from colder to warmer). The efficiency or coefficient of performance (COP or KR) of a refrigerator evaluates the ratio of the heat removed from the inside to the work input required to accomplish this task.
Overall, for the duration in which the refrigerator door remains closed, the refrigeration system continuously cycles the coolant to maintain a stable low temperature, thus keeping the food within preserved. The transfer and transformation of energy in this form are an intentional exception to the rule of spontaneous heat flow from hotter to cooler areas, being facilitated by external work input.
how can you use food labels and DRIs to make sure you get enough iron
Use food labels to check the percent daily values (% DV) for iron and choose foods that are high in iron or iron-fortified. The DRIs provide age- and gender-specific recommendations for daily iron intake. Consuming vitamin C with iron-rich foods increases absorption.
Explanation:The student has asked how to use food labels and Dietary Reference Intakes (DRIs) to ensure adequate iron intake. Boys and girls aged 9 to 13 require 9 mg of iron daily, girls 14-18 require 15 mg, boys 14-18 require 11 mg, and pregnant women need 27 mg. Food labels and the percent daily values (% DV) help identify the amount of iron in foods. Iron-fortified foods like breakfast cereals contain added iron, often as 'reduced iron' or fine metallic iron powder, which is converted to Fe²+ in the body. Consuming vitamin C alongside iron-rich foods enhances iron absorption. It's important to note that while some protein sources are high in iron, they can also be high in fat.
Why is the Golgi apparatus in the cell?
What are the answers for 21 and 22
6 Which of the following word pairs correctly completes the sentence below? Mechanical waves travel faster through _______ than through _______. A. solids, liquids B. air, liquids C. liquids, solids D. a vacuum, air
Answer:
Solids
Liquids
Explanation:
A mechanical wave is a type of wave that needs a medium to propagate or transfer its energy to.
An example of a mechanical wave is a sound wave.
Sound waves are not capable of going through vacuum.
Mechanical waves travel faster through solids than liquids because they move with the oscillations of the particles they go through and solid particles are denser and have stronger bonding forces, the mechanical waves pass through quicker than liquids that have weaker bonding forces.
Choose all the answers that apply.
Sound _____.
travels in longitudinal waves
can travel through a vacuum
travels most slowly through a gas
speeds up when temperature is increased
is caused by vibration
Answer: your answers are A,D,And E
Explanation:
Which part of photosynthesis is affected by excluding co2 from the plants environment?
Answer: Plants would not be able to synthesize glucose.
Explanation:
The photosynthesis requires carbon dioxide, water in the presence of sunlight to converted into glucose and release oxygen into the environment.
The If carbon dioxide would not be available during this process then the glucose would not be synthesized.
If there will be no glucose in the plants then the plants would die without food. The other organism would also die because the plant provide food to them.
what are the two major types of cells found on earth
Which protein serves as a chemical messenger
Draw Conclusions Why is it important for a doctor to ask a patient questions in addition to doing a physical exam
Which of the following statements is true?
The human eye can perceive a wide range of electromagnetic radiation wavelengths.
In bright light, the iris of an eye will dilate the pupil.
Light is created by vibrations in electric and magnetic fields.
All of the above.
Answer:
C
Explanation:
The answer is Light is created by vibrations in electric and magnetic fields. I chose this & got correct on test
in what way can runoff be a problem
Excessive runoff can be problematic as it can lead to soil erosion, water pollution, and flooding. It can carry pollutants from farmland and urban areas into water bodies, damaging aquatic ecosystems and causing health problems for humans. Also, it can cause flooding and damage properties and endanger lives.
Explanation:Runoff, particularly when it becomes excessive, can cause several problems. For instance, it can lead to soil erosion, which degrades arable land, reducing its agricultural productivity.
Runoff can also carry pollutants (like pesticides and fertilizers from farmland and waste materials in cities) which end up contaminating water bodies such as rivers, streams, and eventually, oceans. This phenomenon, known as water pollution, can have detrimental effects on aquatic ecosystems and human health.
Additionally, excessive runoff can cause flooding, a serious risk to both property and lives in areas prone to this kind of event.
Learn more about Runoff here:https://brainly.com/question/31953611
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Compare and contrast cell communication by nerve signal and communication across plasmodesmata.
PLEASE HELP!!!!! 30 points
if a sample of dna contains 36% thymine, how much guanine would you find?
I WILL GIVE 20 POINTS!!! Multicellular organisms have five levels of organization ranging from simplest to most complex. The simplest level is the cellular level. You are the most complex level: you are an organism. List the five levels of organization, from simplest to most complex. Describe each level with one or two sentences. Give an example at each level.
Some cells produce and secrete high levels of digestive proteins. Which organelles would you expect to be abundant in those cells and why?
Final answer:
Cells that produce and secrete digestive proteins have an abundance of Golgi apparatus and rough endoplasmic reticulum, which are involved in the synthesis, processing, and secretion of proteins.
Explanation:
Cells that produce and secrete high levels of digestive proteins are expected to have an abundance of certain organelles that facilitate this process. Specifically, Golgi apparatus (GA) and rough endoplasmic reticulum (RER) are highly abundant in such cells. The RER is involved in the synthesis and modification of proteins. After synthesis, these proteins are transported to the GA, where they are further processed, sorted, and packaged into secretory vesicles. These vesicles are then transported to the cell surface and release their contents, such as digestive enzymes, via the process of exocytosis. This efficient cellular machinery is evident in cells like exocrine cells of the pancreas or cells of the salivary glands.
Which best shows a harmful effect of a mutation?
Answer:
The correct answer will be option in which mutation is observed in the legs of the frog.
Explanation:
The mutation is a change which takes place in the sequence of DNA. When it takes place in the segment of DNA which can code the trait, it is expressed in the trait.
These mutation can prove beneficial to the organisms but can also become lethal to the organisms like the one with a mutation in legs of the frog as the legs of the frog helps provide the ability to move as well to swim in the water. if the legs will show a trait of mutation, the frog will not be able to swim and move properly.
Thus, option in which mutation is observed in the legs of the frog is the correct answer.
ways to organize data
Ovarian follicles cells produce estrogen, which is a steroid. What organelle will be present in abundance so that the follicles cells might perform this function
The steroids are produced by the Smooth endoplasmic reticulum.
The cells, which are involved in the secretion of the steroid molecules have an abundant number of the smooth endoplasmic reticulum, which is abbrevated as SER.
The cells present in the ovary and the testis have a large number of smooth endoplasmic reticulum. The abundant number of smoothe endoplasmic reticulum allow them to produce a large amount of steroid molecule to produce the steroid hormones estrogen and testosterone.
Hence, in this case, the ovarian cells would have a large number of SER.
Fill in the blank help please
Your teacher has asked you to complete labeling this plant cell. You know that plant cells have a nucleus. What two organelles should be labeled that WOULD NOT be found in an animal cell?
(30 Points for answering)
A) cytoplasm and cell wall
B) membrane and chloroplasts
C) cell wall and chloroplasts
D) cytoplasm and chloroplasts
Answer:
c
Explanation:
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Which of these is [not] a property of a mineral
Magnetism
Color
Reflection
Cleavage
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all eukaryotic cells have mitochondria but only plants and some photosynthesis process of chloroplast? what can be inferred?
Cystic fibrosis is an inherited genetic disorder caused by two copies of a defective recessive gene that causes
A) senility at around age fifty and slow nervous system damage.
B) the buildup of fluid in the lungs, and complications from pneumonia.
C) a form of mental impairment, along with heart defects, and a webbed neck.
D) the inability of the blood to clot properly, resulting in organ damage and easy bruising.
What’s is the best description of osmosis?
if you found piophila casei and bone eating beetles on a body, what could you say about the time of death
The presence of Piophila casei and bone-eating beetles on a body could indicate a post-mortem interval of several days to weeks, as these are species associated with later stages of decomposition. By examining the specific insect species and their stages of development, forensic entomologists can more accurately estimate the time of death.
If one found Piophila casei (cheese skipper flies) and bone-eating beetles on a body, it could suggest a specific timeframe since the individual's time of death. Piophila casei is known to be involved in the latter stages of decomposition, and the presence of bone-eating beetles, which tends to indicate a period of weeks into the decomposition process, can help to narrow down the timeline even further. Forensic entomology is the field that studies how insects can help in determining the post-mortem interval (PMI), which is the time elapsed since a person has died.
Flies, such as those in the Calliphoridae family, are usually the first to arrive at a decomposing carcass and lay eggs, often within minutes or hours after death. Over time, these eggs hatch into larvae and grow at a steady pace, and the development stage of these larvae can provide a minimum PMI. Beetles, with their longer life cycles, can cross-validate this evidence and expand the time frame to span over several weeks of decomposition.
The ecological succession of insects on a carcass starts with initial colonizers like blow flies and progresses through a predictable sequence that includes various beetle families. Over time, the body will attract different insect species according to the stage of decomposition, which is known to forensic scientists as 'ecological succession'. By analyzing this succession and the specific stages of insect development, a more accurate estimation of the time of death can be achieved.
What best explains the relationship between structure and function of the cell membrane? (2 points)
The single layer membrane surrounding the outside of the cell allows for the easy removal of waste.
The lipids and proteins that make up the membrane allow it to be selective about what enters and leaves the cell.
The fluid inside the membrane buffers the chemical reactions taking place inside the cell.
The lipids forming the membrane provide energy for protein synthesis.
Answer:
The lipids and proteins that make up the membrane allow it to be selective about what enters and leaves the cell.
Explanation:
The cell membrane is double membranous which is a phospholipid bilayer. It is selectively permeable to only few substances because of the presence of lipids and integral proteins present in it. While lipid bilayer allows direct entry of only fat soluble substances like steroid hormones, fat soluble vitamins etc., the integral/embedded proteins present in the bilayer in the form of receptors, channels and pumps allow the entry of nutrients, ions, wastes etc. But, entry of some substances like water, glucose etc. hardly pass through the cell membrane.