Which action is a reflex action? asking for coffee in a cold climate blinking when light is flashed in the eyes drinking water when thirsty swallowing food taking an exam
The correct answer is blinking when light is flashed in the eyes
The blinking of eyes is considered as the reflex action because it is an involuntary closing of eyelids which is elicited by the stimulation of cornea. Any peripheral response can generate blinking of eyes. The purpose of this reflex action is to protect the eyes from foreign stimulus. When a light is flashed on the eyes it served as an external stimulus, as a result of this the eyes blinked to protect the eyes from bright light. It occurs in 0.1 seconds.
Our dependence on fossil fuels is of increasing concern as the petroleum deposits dwindle. Hybrid cars use _________ power as an alternative fuel source.
The answer is Electric.
Answer:
electric
Explanation:
on usa test prep A. ELECTRIC
Rosalind franklin used x-ray diffraction to study wet dna. her data were used by james watson and francis crick to determine the structure of dna. what did her data suggest about the structure of dna?
Final answer:
Rosalind Franklin's X-ray diffraction data provided evidence that DNA has a helical structure with two strands, leading to the double helix model proposed by Watson and Crick. Her critical contributions were recognized posthumously as Nobel Prizes are not awarded posthumously.
Explanation:
The data collected by Rosalind Franklin through X-ray diffraction methods suggested several critical features about the structure of DNA. Most notably, Franklin's photographs indicated that DNA was composed of two strands, forming a helix. Her image known as "Photograph 51" revealed a clear X-shaped pattern pointing to the helical structure of DNA. Franklin also discovered that DNA consisted of two forms: a long, thin fiber when wet (type B) and a short, wide fiber when dry (type A). These observations provided Watson and Crick with the crucial information needed to model DNA as a double helix, determining the size and structure of DNA.
Franklin's contribution to the discovery of DNA's structure was fundamental, yet her work did not receive the same recognition as her male counterparts during her lifetime. Unfortunately, the importance of Franklin's research was fully acknowledged only after her untimely death, as Nobel Prizes are not awarded posthumously. Despite this, her work continues to be celebrated for its invaluable contribution to our understanding of genetics and molecular biology.
He thymus gland is actually composed of lymphoid tissue and is located in the mediastinal cavity, in front of and above the _________.
The thymus gland, an essential part of the human immune system, is located in the mediastinal cavity, in front of and above the heart.
Explanation:The thymus gland is a vital part of the human immune system. The thymus gland, an essential part of the human immune system, is located in the mediastinal cavity, in front of and above the heart. Composed primarily of lymphoid tissue, it is located in the mediastinal cavity. When the question asks what is placed 'in front of and above', it is referring to the heart. This gland is responsible for the production of T-cells, which are fundamental for immune response.
Learn more about Thymus Gland here:https://brainly.com/question/33723146
#SPJ6
In which order do the necessary enzymes act to repair a thymine dimer by nucleotide excision repair?a) nuclease, dna polymerase, rna primaseb) helicase, dna polymerase, dna ligasec) dna ligase, nuclease, helicased) dna polymerase, rna polymerase, dna ligasee) nuclease, dna polymerase, dna liga?
The correct order of enzymes involved in nucleotide excision repair to repair a thymine dimer is: nuclease, DNA polymerase, and DNA ligase, which is in option e. So, option e is the correct answer.
Nucleotide excision repair is a crucial mechanism that cells employ to fix DNA damage, such as thymine dimers. When a thymine dimer occurs, it distorts the DNA structure and disrupts normal base pairing. To rectify this damage, a series of enzymes work together in a coordinated manner. The first step involves a nuclease enzyme that recognizes the thymine dimer and cuts out the damaged portion of DNA. This incision creates a gap in the DNA strand, removing the section that contains the dimer. So, option e is the correct answer.
Learn more about the excision repair here.
https://brainly.com/question/10073513
#SPJ6
What is a the study of chemical reactions in living organisms called?
The process by which non-biodegradable pollutants become more concentrated near the top of a food chain is called _______.
Bioaccumulation is the process in which there is increase in the concentration of pollutants in an organism at the top of a food chain. Bioaccumulation occurs when non-biodegradable pollutants such as chemical enter into an organism and the organism is unable to break down or excrete the chemical. The chemical then continues to accumulate until it eventually becomes deadly to the living organism.
How often an allele occurs in the gene pool is _________ __________?
What are the two major organs that occupy the thoracic cavity?
during gastrulation in frogs, a rod of mesoderm under the dorsal surface forms the _____.
Notochord
During gastrulation in frogs, a rod of mesoderm under the dorsal surface develops into the notochord which is the precursor of the backbone. The notochord plays an important structural role by serving as the axial skeleton of the embryo until other elements such as the vertebrae forms.
"emerging adults who manage their sleep patterns, monitor their food intake, and maintain a health weight are using ____________________ skills to promote their own health."
A medical assistant discovers an unidentifiable liquid on the floor of one of the clinic's treatment rooms. which of the rollowing materials should the assistant use to remove and dispose of the liquid
A clean-up kit
A clean-up kit is a set of equipment that is designed for cleaning purposes such as removal of dirts, stains, or impurities. A clean-up kit contains equipment such as gloves, absorbent pads, face shield, shoe covers, trash bags and disposable apron and gown which are required for cleaning. For the question given above, the assistant should use a clean up kit to remove and dispose the liquid.
What part of the cell theory relates to cell division and ferilization?
Oral contraception is not recommended for women with question 5 options:
a.a history of blood clots.
b.a low resting heart rate.
c.an intense exercise regimen.
d.a history of asthma.
Oral contraception is not recommended for women with a low resting heart rate. Thus, the correct option for this question is B.
What is oral contraception?Oral contraception may be characterized as a type of contraceptive method that is utilized in order to prevent the circumstance of pregnancy. This method includes various kinds of pills and other drugs for the successful prevention of pregnancy.
According to the context of this question, the combined oral contraceptive pill is often referred to as the birth control pill. These pills may contain hormones that block the release of eggs from the ovaries. Most oral contraceptives include estrogen and progesterone. This type of contraceptive method is not recommended for women with a low resting heart rate.
Therefore, the correct option for this question is B.
To learn more about Contraceptive methods, refer to the link:
https://brainly.com/question/2296833
#SPJ5
On which cell types do antibodies exist as transmembrane proteins?
Naïve B cell
Naïve B cell is known to be a B cell that is not exposed to an antigen. Thus, once naïve B cell is exposed to an antigen, it becomes a plasma cell or memory B cell that secretes antibodies specific to the antigen that was original bound.
Plasma membranes of adjacent cardiac muscle cells interlock at specialized regions called intercalated disks. what is the significance of this feature of cardiac muscles?
Intercalated disks in cardiac muscles are vital for heart function. They contain gap junctions that facilitate coordinated contraction and desmosomes that provide mechanical strength.
Explanation:The intercalated disks of cardiac muscles are crucial for the heart's functionality. These specialized regions where adjacent cardiac muscle cells interlock are packed with gap junctions and desmosomes. The gap junctions allow for the rapid spread of electric currents, enabling the heart to beat as a coordinated unit. This simultaneous contraction is essential for effective heart function. On the other hand, the desmosomes provide mechanical strength to the heart by holding cardiac muscle cells together during vigorous contraction.
Learn more about Intercalated Disks here:https://brainly.com/question/31668414
#SPJ3
Most often, antigens are composed of __________. view available hint(s) most often, antigens are composed of __________. polysaccharides lipids glycoproteins nucleic acids
Menopause normally occurs between the ages of forty-five to fifty-five, but can be induced prematurely by which procedure?
Menopause normally occurs between the age groups of 45 to 55 years, but it can be induced prematurely by the procedure of surgical removal of ovaries.
What is Menopause?Menopause is the time in the lifecycle of a female which marks the end of the menstrual cycles and also reproduction. It is diagnosed after a person has undergone 12 months without a single menstrual period. Menopause can happen in the age of 40s or 50s, but the average age of menopause in the United States is found to be 51. Menopause is a biological process but it can be induced by several procedures.
Menopause that happens between the age of 41 and 45 years of age is called as the early menopause. In some cases, early or premature menopause is brought upon by the surgical removal of the ovaries, or by the medical treatments including radiation therapy and chemotherapy.
Learn more about Menopause here:
https://brainly.com/question/3256449
#SPJ6
How would you classify the relationship between the butterfly fish and the coral polyps?
What physical feature serves as a "safety-valve" overflow basin for flooding?
Answer and Explanation:
The Tonle Sap lake serves as a "safety-valve" overflow basin for flooding. It is located in Camboya. Its extension varies according to the season. The lake might occupy 2500 km² during the dry season but can reach up to 16000 km² during the wet season.
The Tonle Sap lake is fed by numerous rivers from different latitudes and altitudes, and it is tributary of the Sap river that flows towards the southeast and joins the Mekong river, conforming together the Basac river.
The Tonle Sap river is reversible, also according to the season. When the Monzon rains enhance the Mekong river´s level, the curse of water of the Tonle Sap river inverts flowing towards back the northeast. The Tonle Sap river stops providing water to the Mekong and begins to provide water to the Tonle Sap Lake. This last one sharply elevates its level.
Once the wet season is over, the Tonle Sap river redirects its water back to its original direction.
The Tonle Sap lake acts as a regulator of the Mekong Lake´s course.
This lake is very rich in resources, especially fishes that live in these waters, and are the feeding source of most Vietnamese.
People who cross over or occupy an intermediate position in the binary male-female gender construction are called transsexuals. intersexuals. transgenders. eunuchs. third genders.
Over 90% of all parasympathetic fibers are derived from cranial nerves ________. v (trigeminal) vii (facial) x (vagus) xii (hypoglossal)
Forms when entire organisms or parts of organisms are prevented from decaying by being trapped in rock, ice, tar, or amber.
The benefits of spines on a cactus are similar to the benefits of the ?.
If RNA extracted from a virus was injected into a host cell, the cell will not begin to make new viruses. TRUE FALSE
nevermind the answer is true
Answer:
False
Explanation:
The genetic material of a virus cannot replicate on its own , therefore it needs a host cell. Now, when the RNA of the virus is introduced into the host cell, the processes such as uncoating, replication, and assembly causes incorporation of genetic material of virus into the genetic material host cell, thereby causing replication of viral genome. Replication of viral genome is equivalent to formation of new viruses.
Hence, If RNA extracted from a virus was injected into a host cell, the cell will begin to make new viruses.
Therefore, the given statement is false
Which halogen is a fatal poisonous gas, but is put in drinking water and swimming pools to prevent serious diseases?
Describe the intracellular events that occur when a population of wild type ( lac+) escherichia coliis transferred from a medium with glucose as the sole nutrient source to a medium with lactose as the sole nutrient source.
The lac repressor protein is bound to the operator region of the lac operon when there is no lactose in the medium. When introduced in lactose, it binds to an allosteric site on the repressor causing its to change conformation and release from the operator. This allows the polymerase that is bound to the promoter region to proceed transcription of the lac operon genes (LacZ, Lac A, and Lac Y). Translation of these genes forms enzymes that enable the organism to break down lactose for energy.
Which symbol on a regulatory marker indicates hazards such as rocks or stumps? green square?
The symbol on a regulatory marker that indicates hazards such as rocks or stumps is an Orange Diamond. Regulatory markers are types of non-lateral markers such as white and orange markings that are used as navigation aids that give directions, warn of dangers and marks controlled locations. Orange diamond shapes warns of dangers such as rocks, stumps or construction.
What is the minimum number of daily kcals necessary to ensure nutritional adequacy in an eating plan for reducing weight?
How can the fossil record provide evidence for evolutionary relationships?