During Pangea, Madagascar and India were one landmass. The species of frogs were homogenous across the landmass. However, after continental drift that began approximately 88 years ago, allopatric speciation occurred to form different species on the two continents.
The dusky salamanders on the two continents that could once reproduce viable offspring 88 years ago, cannot reproduce viably today because they have diverged into two different species now.
The nurse is assisting the client in planning care during exacerbations of ménière's disease. which diet would the nurse identify as appropriate at this time?
Meniere's disease affects the inner ear and causes vertigo and tinnitus in the person suffering. To cure this disease a low sodium diet would be the most appropriate. Thus, option 2 is correct.
What is diet?A diet is a food consumed by the person that includes vegetables, fruits, pulses, animal meat, etc. For a person to be healthy the diet must include food with high nutritional values.
To treat and prevent Meniere's disease, one should consume less sodium in the diet. High sodium in the salt will lead to a high holding of the fluid in the body. This fluid buildup in the ear causes vertigo and tinnitus.
Therefore, a low sodium diet must be consumed to treat Meniere's disease.
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The complete question is attached to the image below.
Two species of ant compete for limited resources in a front yard until only one species is able to remain. this is an example of __________.
Hormones often cause a cell to elicit multiple responses; this is because ________.
In the 1990s, scientists used satellite images to locate a giant asteroid crater in the Gulf of Mexico. The crater, named Chicxulub, was formed about 65 million years ago. After discovering the crater, scientists used computer programs to model the effects of the asteroid's impact on the planet. Why did scientists have to use a model in order to study the asteroid's effects?
Answer:
the event occurred too long to study directly
Explanation:
study island
Which of the following statements illustrates the value of scientific research?
It increases personal knowledge and understanding of the world.
It improves the quality of life for individuals by advancing medicine and science.
It allows scientists to share information, and achieve honor and historical importance.
It strengthens understanding of why people are here on Earth and where they came from.
If a is dominant to a and b is dominant to b, what is the expected phenotypic ratio of the cross aabb × aabb? if a is dominant to a and b is dominant to b, what is the expected phenotypic ratio of the cross aabb × aabb? 9:3:3:1 1:1:1:1 16:0:0:0 8:4:2:2
The cross of two homozygous recessive entities (aabb x aabb) will result in offspring all bearing the 100% recessive traits pattern. The phenotypic ratio would therefore be represented as 1:0:0:0.
Explanation:If we consider that both the 'a' and 'b' traits are homozygous recessive (aabb), the cross of aabb x aabb will result in the offspring also being homozygous recessive (aabb). Since the traits 'a' and 'b' show simple dominance where 'A' and 'B' are dominant to 'a' and 'b', but we only have 'a' and 'b' present, the resulting offspring will only exhibit the recessive traits. Therefore, the phenotypic ratio would be 100% expressing the recessive traits. To put it in terms of ratios like those offered in the question, that would be 1:0:0:0.
Let's elaborate it further. Mendel's third-generation phenotype ratio of 3:1 can be understood in the context of Aa × Aa cross. In these instances, both AA and Aa individuals express the dominant trait and are counted together thereby leading to the typical 3:1 ratio (dominant:recessive). However, with aabb x aabb, all the parents' gametes are recessive and so all the offspring will also be homozygous recessive, deviating from the traditional Mendelian ratio.
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When a drug is fat soluble, sniffing is a rapid and effective way to absorb it?
Unlike skeletal muscle action potentials, cardiac muscle action potentials __________. unlike skeletal muscle action potentials, cardiac muscle action potentials __________. have a short refractory period do not involve repolarization begin with a rapid depolarization phase involve calcium voltage-gated channels
how does DNA evidence support the theory of evolution
The _____ is a reference value for the intake of nutrients used on the food label. adequate intake daily value estimated average requirement recommended dietary allowance
Answer:
The correct answer is the recommended dietary allowance.
Explanation:
The RDA or the recommended dietary allowance refers to the level of the average daily dietary intake, which is adequate to meet the need of nutrients of almost all the healthy individuals in a specific gender and life stage group, the life stage comprises age, and when probable lactation or pregnancy. The setting of the RDA relies upon being able to set the EAR (estimated average requirement).
Look at the two images of cells. mc020-1.jpg Which of the following statements best describes what can be seen in the images? Image A represents a peptide hormone that interacts with a receptor, and image B represents a steroid hormone that interacts with the cell’s DNA. Image A represents a steroid hormone that interacts with the cell’s DNA, and image B represents a peptide hormone that interacts with a receptor. Image A represents an endocrine hormone that interacts with a receptor, and image B represents an exocrine hormone that interacts with the cell’s DNA. Image A represents an exocrine hormone that interacts with the cell’s DNA, and image B represents an endocrine hormone that interacts with a receptor.
The statement which best describes what can be seen in the images is: Option A.
What is an endocrine system?An endocrine system refers to series of ductless glands and organs found in the body of a living organism and they are saddled with the responsiblity of producting and secreting hormones, especially for the performance of various life functions such as:
GrowthReproductionMetabolismMoodSleepBased on the image, we can deduce that image A illustrates a peptide hormone that is interacting with a receptor while image B shows a steroid hormone that interacts with the cell's deoxyribonucleic acid (DNA).
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Jillian has a condition called agenesis of the uterus. A women with that his condition is born without a uterus. What type of infertility treatment will suit Jillian
The hydrolysis of atp on the na+/ k+ pump results in
How can limiting nonpoint sources of oil pollution help to keep the oceans clean?
Since the early 1990s, geneticists have produced ____________ crops that yield fruits and vegetables commonly found in U.S. supermarkets.
The answer is genetically modified.
Substances that plug up an enzyme's active site are ________.
You are infected with an antibiotic-resistant strain of klebsiella pneumoniae. where did you most likely contract it?
Smoke from the lit end of a cigarette has ____ concentrations of carcinogens and nicotine compared to cigarette smoke exhaled from the lungs of a smoker.
Your ems team is performing cpr on a 60-year-old male in cardiac arrest. you connect the aed, push the analyze button, and receive a "no shock advised" message. you should:
A researcher has discovered a new species of bacteria that is remarkably similar to
e. coli in its morphology and rrna sequences. how should the bacteria be classified?
What gene are we going to attempt to introduce into our bacterial strain?
Which classification of bone has two thin layers of compact bone surrounded by a layer of spongy bone?
Final answer:
Flat bones have two layers of compact bone surrounding a layer of spongy bone, offering protection and a surface for muscle attachment while maintaining a lightweight structure.
Explanation:
The classification of bone that has two thin layers of compact bone surrounded by a layer of spongy bone is known as a flat bone. Flat bones, such as the bones of the skull, ribs, and sternum, are constructed in such a way as to provide protection to internal organs and to offer broad surfaces for muscle attachment. These bones consist of a layer of spongy bone, also known as diploë, which is lined on either side by a layer of denser compact bone. This arrangement facilitates strength and resilience while minimizing weight.
The classification of bone that has two thin layers of compact bone surrounding a layer of spongy bone is known as flat bone. Flat bones are typically thin, flattened, and often curved. Examples of flat bones include the bones of the skull (such as the parietal and frontal bones) and the ribs. The two outer layers of compact bone provide strength and protection, while the inner layer of spongy bone helps to reduce the bone's weight without compromising its strength.
The diversity of human eye color can be explained by understanding
Final answer:
The diversity in human eye color is due to complex, non-Mendelian inheritance patterns, specifically polygenic inheritance. Multiple genes contribute to the amount of melanin produced, which determines the eye color variety. Environmental factors also play a role in this phenotypic diversity.
Explanation:
Understanding the Diversity of Human Eye Color
The diversity of human eye color such as green, blue, brown, black, hazel, violet, and grey can be linked to complex patterns of inheritance beyond the simple ones Mendel observed. This is due to non-Mendelian inheritance, which refers to genetic principles that cannot be explained by Mendel's laws of inheritance alone. In the case of human eye color, polygenic inheritance is at play, where multiple genes contribute to the resulting phenotype.
Specifically, genetic adaptations and variations in the human genome influence the amount and type of melanin produced, which in turn determines eye color. Genome studies have identified numerous genes related to pigmentation, and the interplay among these genes can create the vast array of eye colors observed. These genes include, but are not limited to, TYR, OCA2/HERC2, TYRP1, SLC45A2, and HPS6i.
Environmental factors also contribute to phenotypic diversity. Adaptations to ultraviolet (UV) radiation levels across different geographical regions have influenced melanin production over time. However, eye color variation remains notably subject to a range of genetic combinations due to its polygenic nature, leading to the vast spectrum we see in human populations.
The property of water that accounts for the ability of liquid water to absorb large amounts of heat and change relatively little in temperature is called
A drop of whiskey on your tongue can be detected in your arm in:
Answer:
The correct answer is seven seconds.
Explanation:
When an individual consumes an alcoholic beverage, about twenty percent of the alcohol gets captivated in the stomach and the rest eighty percent get absorbed in the small intestine. The rate of the absorption of alcohol relies upon many things, that is, the concentration of the alcohol in the beverage, the kind of drink, and that whether the stomach is full or empty as food slows down the absorption of alcohol.
After getting absorbed, the alcohol moves into the bloodstream and gets dissolved in the water of the blood. The blood mediates alcohol all through the body. From the blood, the alcohol then enters and gets dissolved in the water within each and every tissue of the body.
If one takes a whiskey shot and holds it on the tongue than that whiskey moves through the walls of the tongue, the esophagus and then eventually the stomach. However, a shot of whiskey can be detected in the arms when is consumed on an empty stomach, and It touches every prime section of the body within 2 minutes.
How are Protista different from bacteria?
A) Protista reproduce asexually and bacteria do not.
B) Protista are heterotrophic and bacteria are not.
C) Protista have cilia and bacteria do not.
D) Protista have nuclei and bacteria do not.
Protists (algae) are single-celled eukaryotes. They are different from bacteria as they have nuclei in their cells, but bacteria lack distinct nuclei. Thus, option D is correct.
What are protists and bacteria?Protists are the algae that belong to the eukaryotes and have a distinct nucleus or nucleus enclosed in the nuclear membrane. The nuclear membrane protects the nuclei from enzymes.
Bacteria are prokaryotic organisms that are single-celled and do not have a distinct nuclei and rather the genetic material lies in the cytoplasm in the free state.
Therefore, the protists have a defined nucleus.
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What it called when daughter cells get an exact copy of dna from the parent cell
Sara and juan conducted an experiment to test which soil would be best for growing plants. they planted bean seeds in four pots and placed the pots in the sunlight. each pot had a different type of soil. they used all three types of soil seen in the jar: sand, silt, and clay. they also made a mixture of soil using equal parts of sand, silt, and clay. once the seeds were planted, the watered the pots every day and tracked the seed germination and plant growth. what was the dependent variable in the experiment
The dependent variable in the Sara and Juan experiment was seed germination and therefore plant growth.
What is the dependent variable?The dependent variable is the experimental variable we need to measure in the experiment.
The independent variable does not change along with the experimental conditions.In conclusion, the dependent variable in the Sara and Juan experiment was seed germination and therefore plant growth.
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Which structures regulate water loss and gas exchange in the leaves of plants
Final answer:
Stomata and guard cells are the primary structures in leaves that regulate water loss and gas exchange, with the waxy cuticle and trichomes providing additional support in minimizing transpiration and protecting the leaf.
Explanation:
The structures that regulate water loss and gas exchange in the leaves of plants are known as stomata and guard cells. The stomata are small openings primarily located on the underside of the leaf to minimize water loss. These stomata enable the exchange of gases, allowing carbon dioxide in and letting oxygen out for the process of photosynthesis. Guard cells flank each stoma and are responsible for their opening and closing. They react to various environmental cues like light intensity, leaf water status, and carbon dioxide concentrations, helping to maintain a balance between efficient photosynthesis and conservation of water.
In addition to stomata and guard cells, the leaves are covered by a waxy cuticle which also serves to prevent water loss. Other structures like trichomes, which are hair-like structures on the epidermal surface of the leaf, contribute to reducing water loss through transpiration, increasing solar reflectance, and storing compounds that fend off herbivores.
Small, oddly shaped bones that fill gaps between bones of the skull are called