Answer:
Ernst Ruska
Explanation:
Many different host factors can influence a person’s susceptibility or resistance to infectious disease. Some factors are associated with increased susceptibility, whereas other factors are associated with decreased susceptibility.
Organize the following factors, indicating those that increase and those that decrease host susceptibility to infectious disease.
1. proper nutrition
2. smoking & alcoholism
3. good hygiene
4. being very young or very old
A main difference between organisms with simple body plans and those with complex body plans is that A main difference between organisms with simple body plans and those with complex body plans is that animals with simple body plans have a digestive compartment with one opening, whereas organisms with complex body plans have digestive tubes with two openings. animals with simple body plans have digestive tubes with two openings, whereas organisms with complex body plans have a digestive compartment with one opening. animals with simple body plans can ingest food while earlier meals are still being digested, whereas animals with complex body plans cannot. animals with simple body plans eliminate undigested food via an anus, whereas animals with complex body plans eliminate undigested food via a mouth. animals with simple body plans have digestive tubes with specialized compartments, whereas animals with complex body plans do not.
Final answer:
The main difference between simple and complex organisms in regards to digestion is that simple organisms have a digestive compartment with one opening, while complex organisms have a complete digestive system with separate mouth and anus for higher digestive efficiency.
Explanation:
A main difference between organisms with simple body plans and those with complex body plans is that animals with simple body plans have a digestive compartment with one opening, which serves both as a mouth and an anus, known as a gastrovascular cavity. In contrast, organisms with complex body plans usually have a digestive tube with two openings: a mouth for ingestion and an anus for the elimination of waste. This evolution of a complete digestive system allowed for higher efficiency in digestion, enabling continuous eating, more complex digestion with specialized sections, and more effective waste removal. Animals such as Platyhelminthes, Ctenophora, and Cnidaria have simple body plans with a gastrovascular cavity, while more complex organisms, including vertebrates and certain invertebrates such as roundworms, possess a complete digestive system.
The diploid number of a roundworm species is 4. Assuming there is no crossover, and random segregation of homologs during meiosis, how many different possible combinations of chromosomes might there be in the offspring?
There are 4 possible combinations of chromosomes in the offspring of a roundworm species with a diploid number of 4, assuming no crossover events occur.
To determine the number of possible combinations of chromosomes in the offspring, we need to consider the random segregation of homologous chromosomes during meiosis.
For a diploid organism with 'n' chromosome pairs, the number of possible combinations is given by 2n. In this case, the diploid number of roundworm is 4, which means there are 2 pairs of chromosomes (n = 2).Using the formula:[tex]2^2[/tex] = 4In a cool environment, an ectotherm is more likely to survive an extended period of food deprivation than would an equally sized endotherm because the ectotherm ________. a) maintains a higher basal metabolic rate b) expends more energy per kilogram of body mass than does the endotherm c) invests little energy in temperature regulation d) has greater insulation on its body surface
Answer:
c) Invests little energy in temperature regulation
Explanation:
Ectothermic animals are the organisms which are dependent on the external sources of heat in order to regulate their internal body temperature. In these organisms the mechanism for the regulation of heat through internal physiological process is absent. Due to such feature they don't need to spend energy to maintain the body heat in cool environment and thus they can operate at a very economical metabolic rate. And thus they became enable to survive for longer even in the condition of food deprivation.
Answer:
CExplanation:
1. Ectotherm: Ectotherm are cold-blooded animall whose regulation of body temperature depends on external sources, such as sunlight and many other environmental factors.
2. They do not maintain their body temperature by self, so their body temperature changes externally.
3. They are also known as cold blooded animals.
3.They invests little energy in temperature regulation.
4. Example of ectotherms: include the fishes, amphibians, reptiles, and invertebrates.
A scientific explanation for how scientists use evidence to explain common ancestry and biological evolution
Answer:
Biologists use comparisons of form and function to classify life-forms into a hierarchy of groups.
Organisms group in the Eukarya domain are Plantae, Fungi, Animalia. The three kingdoms are distinguished by their modes of nutrition. Plants produce their own sugars and other food molecules by photosynthesis; fungi absorb dissolved nutrients; and animals obtain food by eating other organisms.
There is unity in diversity. Similarities between organisms are evident at all levels of hierarchy.
Mid-ocean ridges, such as the mid-Atlantic ridge, normally form when tectonic plates are:
1) converging
2) diverging
3) stationary
4) sliding past each other
Answer:
2) diverging
Explanation:
Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
Use what you have read to summarize Jackie Robinson’s story in two or three sentences.
Answer: Branch Rickey was searching for the right man to become the first African American player in Major League Baseball. Rickey explained the challenges to player Jackie Robinson. He would face racism and require a unique type of courage to succeed, but if he did succeed, he could make the box score the only thing that mattered.
Explanation: It's the sample response
Jackie Robinson was key in desegregating professional sports in the U.S., being the first African American to play in the National League. He also played an active role in the civil rights movement and contributed towards supporting African-American businesses.
Explanation:Jackie Robinson was an influential figure in the history of desegregation in the United States, particularly in professional sports. On April 15, 1947, Robinson started for the Brooklyn Dodgers, becoming the first African American to break the color barrier in the National League. Beyond his baseball career, he was an active participant in the civil rights movement, served on the board of directors for the NAACP, and assisted in the foundation of an African American-owned bank.
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Which organ systems are used to help the body shiver
Answer:
nervous, muscular
Explanation:
Farmers may use windmills for electricity and pumping water.
True
False
Answer:
THE ANSWER IS TRUE
Explanation:
: )
The appearance of fireflies at dusk is an example of a circadian rhythm because it
Answer:
happens daily
Explanation:
Answer:
Explanation:
1.- C: Happens Dailey
2.- A: seasonal movement
3.-D: offer greater protection....
4.-C: ensure that the meaning....
5.-D: visual signing
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The layer of blood vessels innervated by sympathetic vasomotor fibers is called the
Answer:
Tunica Media I hope this helps
Explanation:
Help please! Fill in the blanks using the word bank, I’ll mark the answer brainliest and 10+ points!!
Answer:
The answer to your question is below
Explanation:
Glucose it is a sugar and then a biomolecule. It is necessary in the
cellular respiration because it helps in the production of
ATP.
Small 90% of the absorption of the nutrients is in the Small
intestine.
H₂O water is a very useful molecule that is necessary in most of
the chemical reactions.
Small I was doubting between small and large intestine, I finally
decided by small intestine because it absorbs 90% of all
the water.
Though the variety of leavening agents have different ways of achieving this, what is the basic way they all achieve their purpose?
0 points
a) They create bubbles
b) They cause the flour in the dough to enlarge in size
c) they kill microbes in the batter
d) They react with proteins in the flour to create Gluten
Answer:
Though the variety of leavening agents have different ways of achieving this, what is the basic way they all achieve their purpose?
They cause the flour in the dough to enlarge in size
Explanation:
Why can’t a virus reproduce on its own?
will give Brainliest
Answer:
Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own. ... They are similar to obligate intracellular parasites as they lack the means for self-reproduction outside a host cell, but unlike parasites, viruses are generally not considered to be true living organisms.
Explanation:
: )
Explanation:
Viruses rely on the cells of other organisms to survive and reproduce, because they can’t capture or store energy themselves. In other words they cannot function outside a host organism, which is why they are often regarded as non-living
Jamie is reviewing a new diet plan that involves purchasing pre-packaged meals and taking a patented energy supplement. In an ad explaining how it works, Jamie reads about a study cited as evidence supporting the effectiveness of the plan. In the study, two groups were followed: one following the plan and another following a simple low-carbohydrate diet. What should Jamie look for in the study to have full confidence in its scientific reliability?
Answer:
Jamie should look at the difference in results in the two groups of people.
Explanation:
According to the question, two groups are being studied in which the one group is taking the food according to the new diet plan and the other group is taking a simple low-carbohydrate diet. So, for having full confidence in its scientific reliability, Jamie should look that the people taking pre-packaged meals as per the new diet plan are getting better results or not than the people who are taking low carbohydrate diet. If she gets a result in which it is found that new diet plan is giving a positive health benefit to the people then this new plan is scientifically reliable.
Answer:
C. Details on the number of studies conducted and the results of each trial!
Explanation:
i got it right on the test
Choose the accurate statements about how communication by the nervous and endocrine systems differs. Check all that apply. Check All That Apply The nervous system releases neurotransmitters at synapses at specific target cells.The nervous system releases neurotransmitters at synapses at specific target cells. The nervous system adapts relatively slowly and may respond for days to weeks.The nervous system adapts relatively slowly and may respond for days to weeks. The endocrine system reacts more slowly to stimuli, often taking seconds to days.The endocrine system reacts more slowly to stimuli, often taking seconds to days. The endocrine system stops quickly when stimulus stops.
Answer:
The nervous system releases neurotransmitters at synapses at specific target cells & The endocrine system reacts more slowly to stimuli, often taking seconds to days.
Explanation:
The nervous system is very specific with where the neurotransmitters go so they will affect target cells. The endocrine system is slower than the nervous system because the hormones travel through the blood so it takes much longer to reach the designated area.
Neurotransmitters are released by the nervous system at synapses with certain target cells.
How nervous system works?The endocrine system responds to stimuli more slowly, frequently taking minutes to days.
The fact that the nervous system utilizes electrical impulses to convey signals through neurons while the endocrine system uses hormones to deliver instructions to the target cells through circulation is one of the most important distinctions between the two systems.
Neurons interact with one another throughout the nervous system through electrical and chemical signals.
Therefore nervous system utilizes electrical impulses to convey signals through neurotransmitters.
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What do paleontologists use to define the boundaries between geologic time intervals?
Answer:
Explanation:
The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.
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One type of fiber that is not digested as it travels through the digestive system is __________________.
Answer:
Fermentable Fiber
Explanation:resistant to digestion and absorption
why is stem cell research gaining importance?
Answer:
Why are stem cell research important? Stem cells represent an exciting area in medicine because of their potential to regenerate and repair damaged tissue. Some current therapies, such as bone marrow transplantation, already make use of stem cells and their potential for regeneration of damaged tissues.
Explanation:
Do you think humans exhibit traits of r- or K-selection? Explain your reasoning.
Answer:
Humans definitely show characteristics of K-selection. Humans have a longer life span than many organisms. They also have few offspring. On average, humans take 12 to 15 years to reach sexual maturity. Humans also care for their young until they’re mature enough to live on their own
Explanation:
Edmentum's sample answer
K and r selection are the part of the Darwinian fitness that depicts the lifespan and the number of offspring. Humans exhibit traits of K-selection as they have a longer lifespan.
What is r- or K-selection?r- or K-selection is the factor of the fitness and survival possessed by the organisms. r-selected species are small in size and are used generally for reproduction. Though the species is smaller in size with a short lifespan that produces a large number of offspring.
On the other hand, K-selected organisms are large and have a longer life span. K refers to the carrying capacity of the species. The organisms tend to give birth to fewer offsprings that undergo maturity and many phases that takes years.
Therefore, humans possess K selection.
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Pigments define the plant's:
Smell
Taste
Shape
Color
Texture
Answer:
The answer is Colour.
Explanation:
Pigments are found in chlorophyll of a plant cell which is green in colour.
In what sense is influenza a zoonotic disease? A. It has animal reservoirs, especially birds and swine. B. It is transmitted by "stealth" arthropods. C. It is transmitted frequently by contact with wool. D. The main reservoir is wild carnivores. E. None of the above.
Answer:
A. It has animal reservoirs especially birds and swine
Explanation:
A zoonotic disease is something that normally exists in animals as in animal resevoirs like birds and swine, but can be transmitted to humans. When this happens our body does not have the proper antibodies prepared to combat the infection as it is foreign to us.
Influenza is a zoonotic disease because it can be transmitted from animal reservoirs, like birds and swine, to humans. The Influenza A virus is especially known for being transmitted from these animals to humans, and such transmissions can lead to widespread human outbreaks.
Explanation:In what sense is influenza a zoonotic disease? The answer is A. It has animal reservoirs, especially birds and swine. Influenza is considered a zoonotic disease because it is caused by pathogens that can be passed from animals, particularly birds and swine, to humans. Influenza A virus can be transmitted from these animal reservoirs to humans through direct contact or exposure to contaminated environments. The flu virus is highly contagious among humans through respiratory secretions and can cause significant outbreaks and pandemics.
Furthermore, a pathogen may have more than one living reservoir. These animal carriers may also be asymptomatic, harboring the virus without showing any signs of the disease themselves. The zoonotic nature of influenza emphasizes the importance of monitoring animal populations for signs of the virus to prevent transmission to humans.
Which of the following releases energy? (4 points)
A)Nutrients entering a cell through the cell membrane
B)Removing a phosphate group from an ATP molecule
C)Building sugar or starch molecules for long-term energy storage
D)Adding an additional phosphate group to an ADP molecule
Answer:
B
Explanation:
Answer:
Which of the following releases energy?
Removing a phosphate group from an ATP molecule
Explanation:
Catabolism describes this as it involves breaking down of molecules and energy is being released
The sarcomere shortens when the myosin heads of the thick filaments
Answer:
The sacromere shorten when
When the myosin heads of the thick filaments in a cocked direction, form cross bridges with actin molecule in the thin filament.
Explanation:
Sacromere is the functional unit of straited muscle and muscle contractions. It initiate involuntary movement.
The sacromere shorten when
When the myosin heads of the thick filaments in a cocked direction, form cross bridges with actin molecule in the thin filament. It cause the sacromere in the muscle fibre to shorten and skeletal muscles to contract
Answer:
The correct answer is: form cross bridges with the actin molecules of the thin filaments.
Explanation:
The sarcomere makes up the unit of the striated muscle tissue, and is the structure responsible for the contractility of this tissue. Sarcomeres are composed of two types of filaments: thick filaments formed by myosin molecules, and thin filaments that are formed by actin molecules. In order to contraction to happen, the thin and the thick filaments move between one another in a coordinated manner to shorten the sarcomere and produce muscle contraction.
For muscle contraction to happen, myosin heads bind to the actin molecule by forming a cross-bridge with it -this happens when the actin-binding site that is commonly hidden by the proteins troponin and tropomyosin, is uncovered thanks to the arrival of calcium ions-. This binding allows the sliding mechanism that will end up shortening the sarcomere.
While hiking in the forest Karl walked past a y'all tree with cones hanging from branches it is the tallest tree in the forest to which phylum does this plant belong
Answer: Conifers
Explanation:I did the test
Answer:
D. Confiers
Explanation:
i did the test!
Which of the following would be selective against the tubercle bacillus? Group of answer choices streptogramin – inhibits protein synthesis vancomycin – inhibits peptidoglycan synthesis ethambutol – inhibits mycolic acid synthesis streptomycin – inhibits protein synthesis bacitracin – inhibits peptidoglycan synthesis
Answer:
C) ethambutol inhibits mycolic acid synthesis
Explanation:
Ethambutol is an antimycobacterial agent which is used in the treatment of tuberculosis. However, Ethambutol is to be given in combination with some other drug.
It inhibits the tubercle bacillus and synthesis of spermidine in mycobacteria by inhibiting the transfer of mycolic acids into the cell wall which further stimulates the synthesis of trehalose dimycolates This is bactericidal and may produce lethal effect if it penetrates into the human cell.
Option C is the right choice of answer
Ethambutol is the antibiotic that selectively targets and inhibits mycolic acid synthesis, making it effective against the tubercle bacillus.
Explanation:The tubercle bacillus, which causes tuberculosis, has a unique cell wall that includes a waxy substance called mycolic acid. This substance is essential for the survival of the bacteria, and its synthesis can be targeted by certain antibiotics for selective toxicity.
Of the antibiotics listed, ethambutol is the one that inhibits mycolic acid synthesis, making it selectively active against the tubercle bacillus. While other antibiotics listed, such as streptomycin and vancomycin, are effective against various bacteria by inhibiting protein synthesis or peptidoglycan synthesis, they do not offer the same targeted action against mycolic acid synthesis as ethambutol.
Coral bleaching can be hazardous to some fish species because
Coral bleaching can be hazardous to fish species due to the disruption of the coral reef ecosystem.
Explanation:Coral bleaching can be hazardous to some fish species because it disrupts the delicate balance of the coral reef ecosystem. Coral reefs provide shelter, food, and breeding grounds for many fish species. When corals bleach, they lose their vibrant color and become weak, making them more susceptible to disease and death. This, in turn, affects the fish species that rely on the coral reef for their survival.
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Explain the main differences between muscular strength and endurance
Answer:
Muscle strength is the ability to exert a maximal amount of force for a short period of time.
Muscle endurance is the ability to do something over and over for an extended period of time without getting tired.
Explanation:
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The endocrine gland called the ____________________ gland communicates with the hypothalamus to control many body activities. a. cortex c. pituitary b. pancreas d. hippocampus
Answer:
pituitary
Explanation:
The hypothalamus works with the pituitary gland, which makes and sends other important hormones around the body. Together, the hypothalamus and pituitary gland control many of the glands that produce hormones of the body, called the endocrine system.
Which activity is a function of blood?
Answer:
blood carries oxygen to difreent parts of the body
Explanation:this is why you have a heart so you can pump oygenated blood throughouut your body hope this helps god bless
Answer:
deliver oxygen and nutrients to and remove wastes from body cells.
Explanation: