One of the reasons for the success of the smallpox eradication campaign was that
a. smallpox viruses were used in the vaccine.
b. smallpox was not a transmissible disease.
c. smallpox occurred only in humans.
d. smallpox occurred only in south america.
e. smallpox could be treated with antibiotics.
A student is asked to draw a food web in which the same organism is a primary consumer as well as a secondary consumer. how should the organism be represented in the food web?
a. the organism must have an arrow pointing from it to a tertiary consumer and another arrow pointed from it to a decomposer.
b. the organism must have an arrow pointing from it to a secondary consumer and another arrow pointing to it from the top predator.
c. the organism must have an arrow pointing to it from a producer and another arrow pointing to it from a primary consumer.
d. the organism must have an arrow pointing from it to primary consumer and another arrow pointing away from it to a decomposer.
Answer:
C. The organism must have an arrow pointing to it from a producer and another arrow pointing to it from a primary consumer.
Explanation:
Normal fruit flies have brownish-yellow bodies, and this body color is dominant. a mutation in the gene for body color can produce flies with an ebony body color. a homozygous normal fruit fly (e
e. is crossed with a homozygous ebony fruit fly (ee). what is the predicted outcome of this genetic cross
Crossing a homozygous normal brownish-yellow body fruit fly (ee) with a homozygous ebony body fruit fly (ee) will result in all offspring being heterozygous (Ee) with a brownish-yellow body phenotype.
In the genetic cross between a homozygous normal fruit fly with a brownish-yellow body (ee) and a homozygous ebony fruit fly (ee), all offspring will inherit one allele for body color from each parent. Since the brownish-yellow body color is dominant, all the F1 generation will display the dominant phenotype. The predicted genotypic outcome will be 100% heterozygous (Ee) with the ebony body color being masked. Therefore, the phenotypic outcome will be 100% brownish-yellow fruit flies, as the ebony body color is recessive and will not be expressed in the presence of the dominant allele.
Which type of vaccines triggers the recipient's immune system to produce antitoxins?
Select the correct definition about tissue grafts.
a. allografts are between different species.
b. xenografts are between individuals of the same species.
c. isografts are between identical twins.
d. autografts are between two genetically identical individuals.
The different types of tissue grafts are allografts, xenografts, isografts, and autografts.
Explanation:The correct definition about tissue grafts is:
Allografts are tissue grafts between individuals of the same species.Xenografts are tissue grafts between different species.Isografts are tissue grafts between genetically identical individuals, such as identical twins.Autografts are tissue grafts taken from one part of an individual's body and transferred to another part of the same individual.Learn more about tissue grafts here:https://brainly.com/question/31818340
#SPJ6
an energy pyramid illustrates that energy is a form of _____is lost to the surrounding as it is passed from one organism to the next???
The most common visual problems are the results of errors of refraction. examples of refraction errors that affect central visual acuity include ______________.
The most common visual problems that result from errors of refraction and affect central visual acuity include:
Myopia (Nearsightedness)
Hyperopia (Farsightedness)
Presbyopia
Astigmatism
What are the errors of refraction
Myopia (Nearsightedness): This is when you can see near objects clearly, but distant objects are blurry. It's often caused by an elongated eye shape, which causes light to focus in front of the retina instead of directly on it.
Hyperopia (Farsightedness): This is the opposite of myopia. You can see distant objects clearly, but near objects are blurry. It's often caused by a shortened eye shape, which causes light to focus behind the retina.
Astigmatism: This is when the cornea (the front surface of the eye) or lens has an irregular shape, causing light to be focused unevenly on the retina. This can result in blurred vision at all distances.
Presbyopia: This is an age-related condition that affects the eye's ability to focus on near objects. It occurs as the lens of the eye becomes less flexible with age.
Learn more about refraction at
https://brainly.com/question/27932095
#SPJ2
About _______ of all body fluid is within cells and intracellular compartments. A. 1/3 B. 2/3 C. 1/2 D. 1/4
What is the process within a genetic algorithm of randomly trying combinations and evaluating the success (or failure) of the outcome?
What is the leading cause of water pollution in the United States?
Answer:
Industrial cause is the leading cause of water pollution in the United States
Explanation:
Industrial waste is the leading cause in the United States for water pollution.Industries generate large water pollution with their actions. these mainly generate from sulphur.Sulphur is a non-metallic substance that is harmful to marine life and aquatic life.Other causes of water pollution could be household waste and sewage waste.
Todd was startled when the door slammed shut. what part of the brainstem is responsible? todd was startled when the door slammed shut. what part of the brainstem is responsible? thalamus medulla midbrain pons
The part of the brainstem responsible for Todd being startled when the door slammed shut is the midbrain.
When an individual is startled by a sudden and loud noise, such as a door slamming, the midbrain plays a crucial role in the startle reflex. The midbrain is part of the brainstem and is involved in auditory and visual reflexes. It contains the reticular activating system (RAS), which is responsible for regulating arousal and alertness. The RAS also plays a role in the startle reflex by activating the amygdala, which processes emotions, and the hypothalamus, which controls the fight-or-flight response.
The other options listed have different functions:
- The thalamus, often considered part of the limbic system, serves as a relay station for sensory and motor signals to the cerebral cortex, but it is not part of the brainstem.
- The medulla is responsible for autonomic control of vital functions such as heart rate, breathing, and blood pressure.
- The pons is involved in sleep regulation and the transmission of sensory information, but it is not the primary region responsible for the startle reflex.
Therefore, the midbrain is the part of the brainstem most directly involved in the startle reflex when Todd was startled by the door slamming shut.
What is the location of the sensory structures that translate things you see into nerve impulses?
A. On the retina
B. On the cornea
C. In the cochlea
D. In the olfactory bulb
A large explosion that takes place at the end of a star’s life cycle is called a ____________.
big bang
supernova
nebula
nuclear reaction
What does the presence of similar genes in very dissimilar organisms imply? a the organisms do not share a common ancestor. b the genes became identical through mutation. c they must be in the same family. d the organisms share a common ancestor?
A 20-year-old male is hospitalized with a 4-day history of cough and a temperature of 41°c. chest sounds are dull to percussion. a sputum gram stain is non-diagnostic. a blood culture is positive for gram-positive cocci in pairs. the recommended treatment is with __________.
John went to a picnic. he took home some leftover chicken and rice, heated it on the stove, ate it, and got sick two hours later. john thought the heating made his food safe because it would have killed any bacteria present. he didn't know that __________ produces a heat-stable toxin. view available hint(s)
Staphylococcus aureus
Staphylococcus aureus is bacterial that causes staphylococcal food poisoning which is one of the most common food-borne diseases. This food poisoning is caused by the ingestion of foods contaminated with enterotoxins produced by staphylococcus aureus. The enterotoxins produced by this organism are able to survive in stomach acids, drying and extreme temperature which makes them heat stable.
Flexor and extensor muscles work _______ to operate the joint.
In an aquatic habitat, an example of organisms from the pioneer community would be - f water reeds g algae h water lilies j grass
Answer: Algae
Explanation: Just took the test
Definition: this is the process of organisms adapting to their environments over time.
Producers release carbon dioxide into the atmosphere during the process of photosynthesis. select one:
a. True
b. False
The dorsal fin of a shark is _____ to the dorsal fin of a dolphin. this anatomical feature is the result of convergent evolution (i.e., adaptation to similar environmental pressures).
If a space in the structure is filled with minerals and then the original animal or plant part dissolves it called
how can the processes of parasitism and predation be different if they both harm organsims?
"tobacco smoke is responsible for what percentage of lung cancer deaths?"
Explain why lightning strikes can be dangerous even when an individual is not directly struck
Lightning poses threats beyond direct strikes due to three primary reasons: ground currents, side flashes, and the concussive force generated by the sudden expansion of superheated air.
Explanation:Even if you are not directly struck by lightning, it still poses several dangers. One such danger is the ground current generated. When lightning hits the ground, the electrical charge spreads outwards through the ground. If you are standing in the area where the charge is spreading, you could potentially get a severe electric shock.
Secondly, lightning can cause side flashes. This happens when the lightning strikes a taller object and a portion of the current jumps from the object to a nearby person. Thirdly, concussive force can be created in the seconds following a lightning strike. A strike can superheat the air around it, causing a strong shock wave that can cause injuries to the ear or even physical displacement.
Learn more about Lightning Strikes here:https://brainly.com/question/33975524
#SPJ12
How can you determine if your cardiovascular system is becoming more fit?
Science Help >~>~>~
A volcanic eruption adds carbon dioxide to the air. This is an example of interactions between the
1)
atmosphere and geosphere
2)
hydrosphere and geosphere
3)
hydrosphere and biosphere
4)
geosphere and biosphere
Which of these organizations acknowledges that the threat to wildlife and biodiversity is greater today than ever before ?
A. Convention on biological diversity
B. The fans at convention
C. World trade organization
D. Convention on international trade in endangered species
The organization that acknowledges that the threat to wildlife and biodiversity is greater today than ever before is the Convention on Biological Diversity which is in option A.
what is Convention on Biological Diversity ?The Convention on Biological Diversity (CBD) acknowledges that the threat to wildlife and biodiversity is greater today than ever before. The CBD is an international treaty signed by 196 countries, which aims to conserve biodiversity, promote sustainable use of its components, and share benefits from genetic resources in a fair and equitable way. The CBD recognizes that human activities such as deforestation, climate change, pollution, and overfishing have a significant impact on the natural world and threaten the survival of many species.
Hence, the organization that acknowledges that the threat to wildlife and biodiversity is greater today than ever before is the Convention on Biological Diversity which is in option A
Learn more about the Convention on Biological Diversity here
https://brainly.com/question/14321006
#SPJ2
Species are disappearing almost a thousand times faster than they are forming. What is the main cause?
Human Impact is the answer
Name the muscular contractions that force the food downwards