Answer:
double-stranded DNA are tightly looped, coiled, and folded so that they fit easily within the cell. ... In both eukaryotes and prokaryotes, this highly compacted DNA is then arranged into structures called chromosomes.
Explanation:
Which of the following identifies the most important reason why the percentage of deaths due to infectious diseases dropped from 1970 to 2015?
Group of answer choices
A.The number of people living in poverty fell as nations became increasingly more developed.
B.More people moved into urban areas, and fewer people remained in disease-prone rural areas.
C.More children were immunized against the major infectious diseases.
D. The use of pesticides became increasingly effective at killing biological threats.
Answer:
A
Explanation:
I choose A people in one hand really have to come together and make this world a strong, better, and brighter place.
Which human activity is correctly paired with the greenhouse gas that it increases?
rice cultivation and water vapor
landfilling and carbon dioxide
deforestation and methane
sewage treatment and nitrous oxide
Answer:
D: Sewage treatment and nitrous oxide
Explanation:
e2020 :) Good luck! <3
The correct pairing of human activity with the greenhouse gas it increases is: Deforestation and methane.
What is deforestation?Deforestation refers to the deliberate or widespread removal of trees and vegetation from forests or woodland areas, leading to the conversion of forested land into non-forest uses. It involves the permanent destruction or clearance of forests, typically for purposes such as agriculture, logging, urbanization, or infrastructure development.
Deforestation has significant environmental, social, and economic implications. It contributes to habitat loss, biodiversity decline, soil erosion, and climate change. Forests play a crucial role in carbon sequestration, regulating the water cycle, and providing habitats for countless species.
Deforestation disrupts these ecological processes and can lead to the loss of invaluable ecosystem services. Efforts to combat deforestation involve sustainable land management, reforestation initiatives, and the promotion of responsible forestry practices.
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Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows the probability that 100 percent of offspring will have red eyes?
Answer:
Which of the following equations are balanced correctly?
2Ag2O → 4Ag + O2
Zn + HCl → ZnCl2 + H2
Cu + H2O → CuO + H2
2C4H10 + 13O2 → 8CO2 + 10H2O
Explanation:
Answer: it’s A
Explanation:
Approximately how long ago did our current era begin ? O A. 1 million years OB. 4.5 billion years C. 65 million yearsO O 100, 000 years
Answer:
C. 65 million years ago
Explanation:
The current locations of the continents and their modern day inhabitants, including humans, can be traced to this period.
Pls vote brainliest :)
Which role is NOT played by the small intestine?
a
Chemical digestion by enzymes
b
Carbohydrate absorption
c
Propulsion of digested substances
d
Vitamin Production
Answer; d.vitamin production
Explanation: The small intestine absorps carbohydrate
FIRST PERSON TO ANSWER GETS BRANLYSEST After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Insulin helped the sugar move from his blood into cells, so his blood sugar levels decreased. Which statement explains what happened next? Positive feedback caused his pancreas to stop secreting insulin. Negative feedback caused his pancreas to stop secreting insulin. Negative feedback caused his pancreas to produce more insulin. Positive feedback caused his pancreas to produce more insulin.
Answer:
The correct answer B
When the body gets the glucose, the glucose in the blood increase then the hormone insulin is released so that the glucose from the blood can be transferred from blood into the cells of the body.
The release of hormone insulin is a positive feedback.
Once the glucose is transferred into the cells of the body then the negative feedback starts acting that stops the secretion of insulin from the pancreas.
What will happen next is that negative feedback would cause his pancreas to stop secreting insulin.
The maintenance of relatively constant internal body processes depends largely on negative feedback.
Negative feedback mechanisms ensure that setpoints are returned.
Hence, whatever causes setpoints to be breached is reversed or removed totally.
In this case, the continuous secretion of insulin will further lower the blood sugar level and causes the setpoint to be breached further. Thus, the actuator (insulin) has to be removed.
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How does the carbon in grass become part of a lion?
choose:
The lion eats the grass
Carbon from grass doesn't end up in a lion.
The carbon ends up in the lion's food chain.
The lion breathes in carbon given out by the plant
Answer:
The carbon ends up in the lion's food chain
Explanation:
Lions just like humans, depends on oxygen to breathe therefore it is not the last option. Lions also don't eat plants, they are carnivores. Members in a food chain are all connected, the only logical answer would be C
Because the trees that produce the sap to make rubber need to be cut down to make it, rubber is considered a nonrenewable resource.
TRUE
FALSE
Please help me!!
Answer: false
Explanation:
The raw material of making rubber products is the natural latex we collect from the rubber tree. Therefore, the answer is Yes. The rubber is a renewable resource. What's more, most of rubber products are made by reclaimed rubber.Hope this helps!
Compare variation adaptation of organisms in different ecosystems
Answer:
In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. Although scientists discussed adaptation prior to the 1800s, it was not until then that Charles Darwin and Alfred Russel Wallace developed the theory of natural selection.
Wallace believed that the evolution of organisms was connected in some way with adaptation of organisms to changing environmental conditions. In developing the theory of evolution by natural selection, Wallace and Darwin both went beyond simple adaptation by explaining how organisms adapt and evolve. The idea of natural selection is that traits that can be passed down allow organisms to adapt to the environment better than other organisms of the same species. This enables better survival and reproduction compared with other members of the species, leading to evolution.
Organisms can adapt to an environment in different ways. They can adapt biologically, meaning they alter body functions. An example of biological adaptation can be seen in the bodies of people living at high altitudes, such as Tibet. Tibetans thrive at altitudes where oxygen levels are up to 40 percent lower than at sea level. Breathing air that thin would cause most people to get sick, but Tibetans’ bodies have evolved changes in their body chemistry. Most people can survive at high altitudes for a short time because their bodies raise their levels of hemoglobin, a protein that transports oxygen in the blood. However, continuously high levels of hemoglobin are dangerous, so increased hemoglobin levels are not a good solution to high-altitude survival in the long term. Tibetans seemed to have evolved genetic mutations that allow them to use oxygen far more efficently without the need for extra hemoglobin.
Organisms can also exhibit behavioral adaptation. One example of behavioral adaptation is how emperor penguins in Antarctica crowd together to share their warmth in the middle of winter.
Scientists who studied adaptation prior to the development of evolutionary theory included Georges Louis Leclerc Comte de Buffon. He was a French mathematician who believed that organisms changed over time by adapting to the environments of their geographical locations. Another French thinker, Jean Baptiste Lamarck, proposed that animals could adapt, pass on their adaptations to their offspring, and therefore evolve. The example he gave stated the ancestors of giraffes might have adapted to a shortage of food from short trees by stretching their necks to reach higher branches. In Lamarck’s thinking, the offspring of a giraffe that stretched its neck would then inherit a slightly longer neck. Lamarck theorized that behaviors aquired in a giraffe's lifetime would affect its offspring. However, it was Darwin’s concept of natural selection, wherein favorable traits like a long neck in giraffes survived not because of aquired skills, but because only giraffes that had long enough necks to feed themselves survived long enough to reproduce. Natural selection, then, provides a more compelling mechanism for adaptation and evolution than Lamarck's theories.
Explanation:There you have it!! Hope its good enough for ya!!
Physical or behavioral characteristics that help an organism fit in with its surroundings are called adaptations. Random mutations result in heritable variation. New heritable features are initially caused by random mutations.
What is adaptation?The process by which organisms adapt to their environment in order to increase their chances of surviving in that environment is known as evolutionary adaptation, or simply adaptation.
Animals can defend themselves against predators and extreme weather by adapting.
Numerous birds may conceal themselves under long grass, while weeds, insects, and other creatures can alter their color to blend in. Predators find it challenging to locate them in search of food as a result.
Each biome's native plant and animal species have unique adaptations that enable them to endure the environment there.
Numerous species are endemic to particular biomes, which means they can only be found there. Some species can adapt to a greater range of climatic and geographic factors than others.
Thus, these are the variation adaptation of organisms in different ecosystems.
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why do lichens and mosses get mostly replaced by larger plant species during succession
Answer:
Lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. Also, as lichens die, they provide some organic matter that also contributes to soil. Mosses can then colonize the thin soil; as mosses die, the soil thickens more allowing other hardy species to colonize
Explanation:
The purpose of oxygen in the body is to serve as the
Answer:
We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy.) What happens in the process of respiration? (Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.
Provide one example of an adaption that a herbivore has to prevent itself from being eaten. Use a specific example.
Answer:
horses have long, strong legs that allow them to run from predators.
what air mass carries warm, moist air
Maritime air masses form over water and are humid.
Answer:Maritime air masses form over water and are humid. Continental air masses form over land and are dry. Therefore, an air mass that develops over northern Canada is called a continental polar air mass and is cold and dry. One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.
Explanation:
Tiny structures inside of cells, such as ribosomes or chloroplasts that have specialized roles are called
Answer:
Tiny structures inside cells such as ribosomes or chloroplast that have specialised roles are called
The kingdom Protista contains the greatest variety of organisms, ranging from single-celled creatures to multicellular ones. Some people consider the kingdom Protista to be a
kingdom into which an organism is classified simply because it does not fit anywhere else. What is most likely to happen to this kingdom in the future?
A. This kingdom will likely be changed into a domain
B. This kingdom will likely be further divided into various new kingdoms.
C. This kingdom will disappear.
D. This kingdom will be merged with another one.
Answer:
b
Explanation:
hich of the following organisms receives at least some energy from plants?
A.
coyotes
B.
rabbits
C.
deer
D.
all of these
Answer: B
Explanation: Coyotes and deer dont really eat plants like that but deer do sometimes so my best bet is B or C. I hope this is helpful!!
pleaseeeee helpppppppppp
Answer:
It would seem to be a feedback mechanism from the looks of it.
Explanation:
And pardon me for asking, don't those videos tell you the answer and you just have to select it?
Shoots of growing plants show positive phototropism as they bend towards the light. This bending happens because cells on the shaded side of the shoot grow faster than cells on the lit side of the shoot. Which hormone stimulates cell growth on the shaded side of shoot resulting in its bending towards light? *
• auxin
• cytokins
• gibbereslins
Answer:
auxin
Explanation:plzz mark me brainliest
this is the correct answer cuz im in 10th grade and i know it
Many fish in the lake die due to an increase in water temperature. What Limiting Factor is this an
example of? *
A. Competition
B. Predation
C. Temperature
D.Natural Disaster
Answer:
C, Temperature
Explanation:
Increase in water heat, changes the temperature levels for the water itself, and including that it may be even warmer towards the bottom of the lake.
1pt Which of the following cells would be produced by meiosis?
A. a heart cell
B. an eye cell
C. a sperm cell
D. a skin cell
Answer: c
Explanation:
because meiosis produces our sex cells
What is the purpose of the vomerine teeth?
Answer:The function of the vomerine teeth is prey-oriented
Explanation: specifically to grip onto food in conjunction with their tongues. Frogs' tongues and vomerine teeth operate as a team to stop prey animals from being able to flee.
5. In a food web in a freshwater ecosystem, shrimp
and mayflies eat water plants. Leeches eat
shrimp. Trout eat mayflies. Which organism is a
producer?
Answer:
The water plants
Explanation:
Key word, PLANT. All producers take energy from the sun through photosynthesis, only producers can do this.
Humans rely on the ocean for a wide variety of resources. However, many human activities impact
ocean ecosystems. Although some of these impacts have positive consequences, many lead to
negative consequences. Below is a list of human activities and a list of some consequences of
those activities, Match each activity with the consequences it can cause. Keep in mind that human
activities may have several consequences.
Answer:
c
Explanation:
The oak and the maple are two different species of trees that also belong to different genera. However, these oak and maples do share many characteristics. Based on their similarities, which levels of classification would they share?
Answer:
Maple and oak trees are both deciduous angiosperms, so the wood each produces is classified as a hardwood. However, the difference between maple and oak wood is significant, and it would be difficult to mistake one for the other. All species of oak display a distinctive well-defined grain pattern whereas the maple wood grain tends to be creamy white with little visible grain. The differences don't stop there, but to really appreciate them, it's important to realize that within the broad category defined by oak is a subset of species that differ significantly from each other. The same is true for maple
Am I right?? I am not sure ... just tryna help
Chargaffs rule states
Answer:
Isn't the Chargaffs a DNA of a rule state that have to be 1/1 ratio.
Explanation:
Brad steps onto a bathroom scale, exerting a downward push of 150 pounds. What force doel the scale exert onto Brad?
Answer:
normal force
Explanation:
Birds, lizards, and amphibians are very different groups of animals. However, these groups share some qualities that help them survive. Which of the following is an example of such a quality? A. Birds, lizards, and amphibians have fur to keep their bodies warm. B. Birds, lizards, and amphibians produce milk to feed their young. C. Birds, lizards, and amphibians reproduce by laying eggs. D. all of these
Answer:
The answer is C
Explanation:
Brainliest?
Answer:
C.
Most mammals don't lay eggs, but platypuses do
A. Only mammals have fur
B. Mammals produce milk
D. The first two were wrong
Explanation:
Write about the following words using the format provided ( state if term is know by another name or expression; state its composition; state its function; state its location; state its significance )
Example: Cell membrane - ( Plasma Membrane; Phospholipid bilayer...... )
Words: Cell membrane, nucleus, chromatin, nuclear envelope, nuclear pore, nucleolus, cytoplasm, mitochondrion, ribosome, endoplasmic reticulum, golgi complex, vacuole, lysosome, centriol, cell wall, plastid, chloroplast, chromoplast, leucoplast
sorry :(
Explanation:
(A) Which parts of an ecosystem perform cellular respiration? Choose all the answers you think are correct.
producers
primary consumers
secondary consumers
decomposers
dead matter
(B.) Does the amount of sunlight affect which parts of an ecosystem perform cellular respiration?
yes
no
Answer: (A) Cellular Respiration takes place in producers,Primary Consumer, and Secondary Consumers.
(B) No
Explanation:
Producers, primary consumers and secondary consumers which form part of an ecosystem perform cellular respiration.
What is cellular respiration?It is a set of reactions by which certain organic compounds are degraded by oxidation, until they become inorganic substances and energy that can be used by the cell.
Most living organisms that are part of an ecosystem carry out cellular respiration, in plants, animals, fungi and protozoa it is carried out in the mitochondria and the cytoplasm.
Therefore, we can conclude that producers, primary consumers and secondary consumers which form part of an ecosystem perform cellular respiration.
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The
sperm
is the male sex cell.
The
egg
is the female sex cell.
A
forms as a result of fertilization.
Answer:
hi buddy, here's your answer
fertilization results in the formation of zygote.
Answer:
zygote
Explanation:
Zygote, fertilized egg cell that results from the union of a female gamete (egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.
