Answer:
This is an example of natural selection in action.
Explanation:
The action of natural selection consists in selecting individuals more adapted to a given ecological condition, eliminating those disadvantaged for that same condition. The most appropriate expression refers to the greater probability of a given individual surviving and leaving descendants in a given environment.
Which of these is not a way that large molecules, like glucose, can enter a cell?
a.diffusion through the cell membrane.
b.facilitated diffusion through protein channels in the cell membrane.
c.endocytosis, when the cell engulfs the particles with pseudopods.
d.active transport, when the cell pumps large molecules in through the membrane?
Answer: Diffusion
Explanation:
Diffusion can be defined as the movement of particles or substance which travels from a region of their higher concentration to an area where it has a low concentration.
It does not requires energy it is a passive process. It is used by smaller particles or gaseous particles.
It cannot be used for larger and heavier molecules like carbohydrates, fats and proteins as they are large and require energy for its transport.
Is the digestive system of flukes complete or incomplete?
He movement of which kind of molecules is controlled by osmosis?
In pea plants, the allele for yellow seeds is dominant to the allele for green seeds. Predict the genotypic ratio of offspring produced by crossing two parents heterozygous for this trait.
Yy x Yy yields 25%YY; 50% Yy and 25% yy where the ratio is 1:2:1 (YY:Yy:yy).
What is Genotype?An organism's genotype defines its complete set of genetic material which can also be used to refer to alleles or variants that occur in a particular gene or genetic locus.
A genotype is described as a scoring of the type of variant present at a given locus which is a location in the genome that can be represented by symbols. For example, YY, Yy, yy can be used to represent a given variant in a gene.
For above given example, the parents heterozygous for this trait is Yy and Yy which is crossed, 25%YY; 50% Yy and 25% yy where the ratio is 1:2:1 (YY:Yy:yy).
Thus, Yy x Yy yields 25%YY; 50% Yy and 25% yy where the ratio is 1:2:1 (YY:Yy:yy).
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Describe and name what the form of dna is in the nucleus during interphase.
Which human activity does not affect the Earth system? (1) disposing of toxic wastes (2) converting solar energy (3) clearing land for farming (4)
burning natural gas and coal
Which vector would be the best choice for cystic fibrosis gene therapy and why?
The vector that would be the best choice for cystic fibrosis gene therapy is adeno-associated virus for it has valuable reasons. First, it is huge enough to carry the gene, second, it will infect the right type of tissue, third, it will not cause an immune response and lastly, it infects the particular cells that divide irregularly. Therefore, this vector will definitely treat cystic fibrosis for it can target affected cells, which is a great help in the normal functioning of an organ.
Beavers kill trees by cutting them down. They then use these trees to dam streams. They also help in creating ponds. This increases the biodiversity of the place because it modifies the distribution and population of many plants and animals. Which type of species are beavers?
Answer:
Engineers
Explanation:
Beavers are called ecosystem engineers by ecologists because the change their ecosystem by cutting trees present in their ecosystem and make dams over the river by these trees, dig channels and build lodges.
These dams alter the river flow and results in the formation of a lake which have still water. Over time many still water-loving animals and plants occupy the ponds and make a new ecosystem in that area. So by making dams beavers helps in increasing the biodiversity of the place.
So due to the capability of beavers to bring change in its ecosystem, they are called ecosystem engineers.
Which plane shows brain structures as they would be seen from the front?
The plane that shows brain structures as seen from the front is the frontal or coronal plane. This vertical plane divides the brain into front and back regions. It runs parallel to the eyes or ears.
The vertical plane that shows brain structures as they would be seen from the front is called the frontal or coronal plane. This plane runs parallel to the eyes or ears and divides the brain into front (anterior) and back (posterior) regions. For example, a slice of the brain taken along the coronal plane would look similar to slicing a loaf of bread with the eyes at the front, allowing you to see both the left and right side structures positioned frontally.
How do worms reproduce?
a. only sexually.
b. only asexually.
c. both sexually and asexually.
d. none of the above?
Worms, depending on the species, can reproduce option c. both sexually and asexually. Annelids, like earthworms, can reproduce in both ways, whereas flatworms generally reproduce sexually.
They fertilize their own eggs after exchanging sperm with another worm during sexual reproduction. They can also reproduce asexually by budding or fission, for example.
Flatworms, on the other hand, typically reproduce sexually. After fertilization, a single flatworm produces both eggs and sperm, and the eggs turn into larvae outside the adult flatworm's body.
Nematodes, like C. elegans, also use a variety of reproductive methods. Depending on the species, these may include dioecious reproduction, monoecious reproduction, self-fertilizing hermaphrodites, or even asexual reproduction through parthenogenesis.
How can pools of blood aid in reconstructing a crime scene?
what are spores and would they be located on the fruiting body
A client spends several minutes making negative comments to the nurse about numerous aspects of the hospital stay. what is the nurse's best initial response?
Answer:
The nurse should inform you that there is no reason to be so negative about hospitalization, because it is only performed in situations of need, where the patient needs professional monitoring constantly.
Explanation:
The act of hospitalization is a complex procedure that should receive all due attention and care. It is important to clarify to the patient that he is in no way being “placed”, “dropped” or “locked up” in a hospital, but that he is starting a treatment of great value to his life and his loved ones. This treatment is necessary because the patient will need to be constantly monitored by healthcare professionals so that the patient's problem is resolved efficiently and as quickly as possible.
What about the structure of atp makes it useful as the energy currency of cells?
Acetylcholine helps ______ muscle contraction in the peripheral nervous system (pns), whereas it acts to ______ muscle contraction in the central nervous system (cns).
In the domain system of classification, prokaryotes are divided into two domains: Bacteria and Archaea. The two domains differ in all BUT one feature. That is, both
That is, both have prokaryotic cells
The two prokaryotic domains differ greatly but all organisms in these domains have prokaryotic cells. Members of the domain Archaea live in extreme environments, including anaerobic conditions. Also, the Archaea have cell walls that are different from the Bacteria as their walls do not contain peptidoglycan. Some scientists believe the Archaea to be more closely related to the eukaryote.
A cell is placed in a water solution with the same salt concentration as the cell. The cell is placed in a _____.
hypotonic solution
hypertonic solution
isotonic solution
The answer is isotonic solution.
Which component of peanut butter rutf supplies essential amino acids?
Peanut butter contains amino acids such as isoleucine and methionine.
What is peanut butter?About 61.6 grams of protein are found in one cup of peanut butter. Additionally, peanut butter is only sufficiently rich in 4 of the 9 necessary amino acids, including isoleucine, lysine, methionine, threonine, and valine.
To complement the protein profile, combine peanut butter with carrots, pumpkin seeds, hedge mustard seeds, crimini mushrooms, or lotus seeds.
Peanut butter does contain abundant amounts of 4 out of the nine essential amino acids. However, peanut butter is a little short on isoleucine, lysine, methionine, threonine and valine.
Therefore, Peanut butter contains amino acids such as isoleucine and methionine.
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What is the safest way to carry a microscope? One student should hold onto the base and one student shouldWhat is the safest way to carry a microscope? One student should hold onto the base and one student should grasp the arm. Two students should hold opposite sides of the microscope base. Place one hand under the base and grasp the arm with the other hand. Place both hands securely around the base of the microscope. grasp the arm. Two students should hold opposite sides of the microscope base. Place one hand under the base and grasp the arm with the other hand. Place both hands securely around the base of the microscope.
Answer: Place one hand under the base and grasp the arm with the other hand.
A microscope is a device that is used to magnify and observe small living and non-living entities. These microscopes are expensive instruments and need to be handle carefully. The correct way to handle a microscope is to place the hand under the base of the microscope, this provides support to the instrument. The other hand should be used to grasp the arm, this provides a hold over the instrument. This is the safest way that assures proper handling and transfer of microscope from one place to another manually.
40 Points!!
If the frequency of p2 equals 0.49, what is the value of q
A. 0.3
B. 0.7
C. 1
D. 0.009
The answer would be 0.3 A
In starfish, pink boy color(P) is dominant to orange(p) , and thick eyebrows(T) are dominant over thin(t) ones. Patrick , who is heterozygous for body color but purebred for thick eyebrows , has met Patti , who is recessive for both traits.
What's patti's phenotype?
Is it possible for the new couple to have offspring that resmeble their mother? explain?
Sometimes genes, for no known reason(s), change their form in a process called
Which shows the pathway of the egg through the reproductive system?
A. ovary → fallopian tube → vagina → uterus
B. vagina → uterus → fallopian tube → ovary
C. fallopian tube → ovary → uterus → vagina
D. ovary → fallopian tube → uterus → vagina
Answer:
D. ovary → fallopian tube → uterus → vagina
Explanation:
The egg/ovum develops in ovary. Ovary is a specialized organ in female reproductive system which is meant for the production and development of ovum. The ovum lies with in the follicle present inside ovary. The follicles mature from primordial follicle to primary follicle which then matures into secondary follicle, secondary follicle in turn matures into tertiary follicle and eventually it forms graafian follicle within the ovary. During the development of ovum, these follicles undergo several physiological changes. On the day of ovulation, graafian follicle ovulates its egg into the fallopian tube which is a part of female reproductive system. The fallopian tube has finger like projections named fimbriae which act as the receptor of the ovum. After that comes uterus which is also known as womb where embryo gets implanted. The uterus ends in vagina which is a part of birth canal.
What part of the digestive system receives secretions from the pancreas and liver?
Dna is wrapped around proteins called _____ to form a chromosome.
Final answer:
DNA in eukaryotic cells is wrapped around histone proteins to form nucleosomes, which create the 'beads on a string' structure. These are further compacted to form chromosomes, especially during cell division.
Explanation:
DNA is wrapped around proteins called histones to form a chromosome. Eukaryotic DNA, which is negatively charged due to phosphate groups, is tightly wound around these positively charged histone proteins. The formation begins with DNA winding around an octamer of histones to create a structure known as the nucleosome. This structure resembles "beads on a string", with each "bead" representing a nucleosome and the string being the linker DNA.
The arrangement is then coiled into a 30 nm fiber and, during cell division, becomes even more densely packed into chromosomes by additional scaffold proteins. This packaging method is central for fitting DNA into the nucleus of eukaryotic cells and for the regulation of gene expression.
15 POINTS Two puppies are born in the same litter.One has blue eyes and the other has brown eyes.Develop a hypothesis as to why the puppies have different eye color.Justify your hypothesis in two or more complete sentences
Tundra means “treeless land.”
True or False
The statement that 'Tundra' means 'treeless land' is true. Tundra is a term used to describe the barren landscapes in extreme latitudes of the Earth where trees can't grow due to harsh conditions.
Explanation:The statement is indeed true. 'Tundra' is a term used in physical geography that really means 'treeless land'. This term is generally used to describe the cold and often barren landscapes found in the extreme northern or southern latitudes of the Earth, where the harsh climate conditions make it difficult for trees to grow. In a tundra biome, most of the vegetation consists of grasses, mosses, and lichens, all of which are better adapted to the cold temperatures and short growing seasons.
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Approximately 40 of fatal highway crashes are alcohol-related.
a.true
b.false
What does the atomic number of an element represent?
a. the number of electron shells in an atom of the element
b. the number of nuclei in an atom of the element
c. the number of neutrons in an atom of the element
d.the number of protons in an atom of the element
D. The number of protons in an atom of the element
(The atomic number of a chemical element is the number of protons found in the nucleus of an atom)
hope this helps
The atomic number of an element denoted as the number of protons in its nucleus and uniquely identifies each element on the periodic table.
Explanation:The atomic number of an element represents d. the number of protons in an atom of the element. It is a fundamental property that defines the identity of an element. Each element on the periodic table has a unique atomic number, which corresponds to the number of protons in its nucleus. For example, carbon has an atomic number of 6, which means it has 6 protons. Increase or decrease in the atomic number changes the element itself.
The atomic number is a fundamental characteristic as it dictates the element's chemical properties and its place in the periodic table. Any alteration in the number of protons, reflected by changes in the atomic number, results in the creation of a different element, showcasing the direct relationship between atomic number and elemental identity.
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A nurse is providing discharge instructions for a client with a diagnosis of gastroesophageal reflux disease (gerd). what should the nurse advise the client to do to limit symptoms of gerd
To manage GERD symptoms, avoid heavy lifting and drinking alcohol, eat small, frequent meals, and stay upright after eating. Additionally, avoid certain foods and consider weight loss, smoking cessation, and loose clothing. Medical treatment options are available if lifestyle changes are insufficient. Option a, c, d are correct.
The nurse would provide the following recommendations to a client with Gastroesophageal Reflux Disease (GERD) to limit symptoms:
Avoid heavy lifting: This helps reduce abdominal pressure, which can exacerbate reflux symptoms.Avoid drinking alcohol: Alcohol can weaken the lower esophageal sphincter and increase acid production.Eat small, frequent meals: This can help prevent the stomach from becoming too full and reduce reflux.Remain upright for at least three hours after eating: Lying down after eating can cause acid to move up into the esophagus.Avoid foods that worsen GERD symptoms, such as fatty foods, peppermint, chocolate, coffee, and spicy foods.In addition, weight loss for those who are overweight, quitting smoking, and avoiding tight-fitting clothing can also help manage GERD symptoms. If lifestyle modifications are not effective, medications or surgery may be necessary.
Complete question as follows:
The nurse is providing discharge instructions for a client with a diagnosis of gastroesophageal reflux disease (GERD). Which recommendations would the nurse give to the client to limit symptoms of GERD?
a. Avoid heavy lifting
b. Lie down after eating
c. Avoid drinking alcohol
d. Eat small, frequent meals
e. Increase fluid intake with meals
f. Wear an abdominal binder/girdle