The frequency of tusklessness is increasing in the African elephant population because evolition which occurs by means of natural selection selects elephants that are tuskless for survival.
What is natural selection?Natural selection is a process by which organisms with featuresthat make them best suited for survival in their environment are selected for survival.
These traits are present in these organisms as a result of evolution.
The traits that are naturally selected enhances the ability of the organism to survive.
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One simple thing that you can do to help safeguard the environment is to eat a diet consisting only of Group of answer choices secondary consumers. a mix of producers and consumers. producers. primary consumers.
In this case, you might be referring to this full question: 'One simple thing that you can do to help safeguard the environment is to eat a diet consisting only of'
secondary consumersa mix of producers and consumersproducersprimary consumersOne simple thing that you can do to help safeguard the environment is to eat a diet consisting only of a mix of producers and consumers.
What is ecosystem homeostasis?Ecosystem homeostasis refers to the state of ecological equilibrium in a particular ecosystem.
The delicate balance between producers and consumers is fundamental to maintaining the ecosystem's health.
Producers (e.g., plants), primary consumers (e.g. herbivores), and secondary consumers (e.g., carnivores) are single players that need to interact to achieve the overall health of the ecosystem.
Loss of biodiversity due either to the lack of producers or consumers can alter the homeostasis of the ecosystem.
In conclusion, it is not possible to safeguard the environment by eating a diet consisting only of a mix of producers and consumers.
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Solar radiation bounces off of a polar ice cap, then goes into the atmosphere where it remains trapped. Which statement best describes this situation?
The radiation is absorbed by the ice and then reflected by the atmosphere.
The radiation is reflected by the ice and then absorbed by the atmosphere.
The radiation is absorbed by the ice and atmosphere.
The radiation is reflected by the ice and atmosphere.
Answer:
The radiation is reflected by the ice and then absorbed by the the atmosphere
Explanation:
Reflection occurs when incoming solar radiation bounces back on an object that it strikes the atmosphere
Answer: The answer is: The radiation is reflected by the ice and then absorbed by the atmosphere
Explanation: I have my ways ;>
Have a great day!
-Sunny
The line on which an object rotates is defined as
Answer:
An axis is an invisible line about which an object rotates, or spins.
Explanation:
ill give brain thing
Answer:
B
Explanation:
Bacteria are bigger and more complex than viruses, though they can still spread through the air.
A genetic change that occurs in a body cell of a mouse will not contribute to the continued genetic diversity of the species because.
Answer:
The genetic material in the germline cells is passed onto offspring, not somatic cells.
Explanation:
A body cell is another terms for somatic cell. Germline cells refer to cells involved in reproduction, like the egg and sperm. During reproduction, only these cells combine to start creating the new life. Therefore, the genetic changes that occur in body cells have no effect on the offspring because the change is not also found in the germline cells. Should there be genetic changes in the germline cells, then these alterations would be present in the offspring.
Hybrid offspring such as mules and zonkeys that are produced when two different, but similar species mate are not considered a true species because the hybrids are infertile. What type of reproductive isolation does this illustrate?
a. behavioral prezygotic reproductive isolation
b. gametic prezygotic reproductive isolation
c. postzygotic reproductive isolation
Answer:
I'd sat b
Explanation:
is this a question or a test or something
how animal husbandry affects society
Which problem does the Montreal Protocol attempt to remedy?
A.The hole in the ozone layer
B.The use of fossil fuels
C.The carbon market
D.The warming of Earth
Answer:
A.The hole in the ozone layer
Explanation:
• Montreal protocol is an international treaty that was signed to control the use of substances that are resulting in the depletion of the ozone hole.
This treaty was signed in the year 1987 and became effective form 1989.
• Since the time that this treaty has come into force, there has been a significant improvement in the ozone hole that was observed over Antarctic as it's size has decreased.
• This improvement has been possible because the treaty helped to phase out chemicals such as chlorofluorocarbons, carbon tetrachloride, etc. that are responsible for ozone hole depletion.
Which two gases are exchanged in the alveoli
Answer:
oxygen is exchanged with carbon dioxide between the alveoli and the blood in the capillaries.
Explanation:
My hypothesis is that exercise will _________ my heart rate
My hypothesis is that music will __________ my heart rate.
Answer:
Increase
Decrease
Explanation:
My hypothesis is that exercise will increase my heart rate
My hypothesis is that music will decrease my heart rate.
The words may vary, like decrease can be lower/lowered
~rere
For anyone who answers ill give points!
Answer:
B
Explanation:
facilitated diffusion requires an ATP, which means it DOES take up energy
The digestive system includes the esophagus, stomach, large intestine, and small intestine.
All of these parts are made up of cells.
Which of the following is true about the cells in the digestive system?
Choose 1 answer:
(A) cells in the stomach and large intestine have the same structure, but different functions.
(B) each cell in the stomach and large intestine is a unique type of cell.
(C) cells in the stomach and large intestine have different, specialized structures and functions.
Answer:
C is the correct answer of this question
The statement which is true about the cells in the digestive system is that the cells in the stomach and large intestine have different, specialized structures and functions. Thus, the correct option for this question is C.
What is the digestive system?The digestive system may be defined as a type of body system that significantly contains organs that take in food and liquids and break them down into substances that the body can use for energy, growth, and tissue repair. This system actively breaks down food components into simpler substances.
Each organ of the body system is composed of a collection of tissues that ultimately derive from cells. Although, the function and structure of each cell are very distinctive when it comes to playing a specific role in complex living organisms, especially human beings.
Therefore, cells in the stomach and large intestine have different, specialized structures and functions is the statement that is true about the cells in the digestive system. Thus, the correct option for this question is C.
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bacterial lipopolysaccharide causes which type of reaction?
:
Lipopolysaccharides (LPS) are one of the main causes of systemic, low-grade inflammation!
!
Bacterial lipopolysaccharide (LPS) can cause an inflammatory reaction.
LPS is a component found in the outer membrane of Gram-negative bacteria. When released or exposed to the immune system, LPS can trigger a strong immune response and induce inflammation.
LPS activates the innate immune system through the recognition of specific structures within LPS by immune cells, particularly toll-like receptor 4 (TLR4).
Activation of TLR4 initiates a signaling cascade that leads to the production and release of various pro-inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-alpha), interleukin-1 (IL-1), and interleukin-6 (IL-6). These cytokines contribute to the initiation and amplification of the inflammatory response.
The inflammatory reaction caused by LPS can result in symptoms such as fever, increased vascular permeability, activation of immune cells, and the release of other inflammatory mediators. In severe cases, excessive or uncontrolled immune response to LPS can lead to systemic inflammatory response syndrome (SIRS) or sepsis, a life-threatening condition.
In summary, bacterial lipopolysaccharide (LPS) causes an inflammatory reaction by activating the immune system and triggering the release of pro-inflammatory cytokines, leading to inflammation and associated symptoms.
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A plant TT for tall height is crossed with a plant tt for short heightThe offspring have the genotype What is the phenotype of the plant?
Explanation:
Here is the answer...hope it helps:)
Which of the following hereditary conditions is characterized by excessive sebum production?
Answer:
a.c.n.e (join the letters together without full stops. i need to type like this as brainly does not allow me to type that word)
Explanation:
An excess of sebum combined with dead skin cells can block pores and cause blemishes such as blackheads and pimples.
both 10 and 11 please i need the answers thankyou
Answer:
10. Amoeba, Paramecium and Algae all contain storage vacuoles.
11. Water and food sources
Hope this help
what are two resources Amoeba and Paramecium need from their environment
Answer:
they are unicellular organisms
What is a pathogen?………..
Answer:
A pathogen is defined as an organism causing disease to its host, with the severity of the disease symptoms referred to as virulence. Pathogens are taxonomically widely diverse and comprise viruses and bacteria as well as unicellular and multicellular eukaryotes.
A pathogen is an organism that causes disease.
Explanation:
A pathogen is usually defined as a microorganism that causes, or can cause, disease. We have defined a pathogen as a microbe that can cause damage in a host.
How does meiosis reduce the number of chromosomes contained in a cell?
A. The cell divides once without replicating first.
B. Meiosis is a two-step process, and the cell divides twice.
C. Half the chromosomes are destroyed when the cell divides.
Answer:
A
cell division makes the number of chromosomes get reduced to only a half of the original
Answer:
B Meiosis is a two-step process, and the cells divide twice
Explanation:
Tried A on my test and was wrong. B was correct
When you're old enough to vote, will you be influenced by celebrity endorsements ? Why or why not?
Celebrity endorsers can influence the portion of the public (increasingly small) who otherwise do not have strong candidate preferences and pay so much attention to politics. If the celebrity has huge interest and knowledge of politics so i may get influenced.
When was celebrity endorsement started in United states?Celebrity endorsements in the U.S. were started in 1920, precisely a hundred years ago, with film stars publicly supporting candidate Warren G. Harding in the presidential election. From then on, many other celebrities raised their political opinions among their fanbase for electoral candidate.
Celebrities themselves, by making an endorsement may risk losing a share of their audience and inviting public joke and anger.
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In many tropical rainforests, people clear land by cutting down trees and burning them. After a few years, the soil runs out of nutrients and cannot be farmed any longer. How does this practice of “slash and burn agriculture” affect Earth’s atmosphere?
Answer:
The polution from burning the trees. Also, the loss of oxygen from the loss of trees.
Explanation:
hope this helps a little
How does drilling for oil negatively impact the environment?
Answer:
Oil and gas drilling is a dirty business
Explanation:
Oil and gas drilling has a serious impact on our wildlands and communities. Drilling projects operate around the clock generating pollution, fueling climate change, disrupting wildlife and damaging public lands that were set aside to benefit all people
Select the correct answer from each drop-down menu. complete the paragraph based on this food chain: polar bears feed on seals. so, polar bears and seals share a . climate change has caused ice caps to melt in colder regions where polar bears live. this change has made it harder for polar bears to successfully hunt seals. this situation will lead to .
Extinction occurs due to the climate change in the polar regions of the earth.
What is the effect of climate change on polar regions?Climate change causes melting of ice caps in colder regions where polar bears live. This change has made it harder for polar bears to successfully hunt seals. This situation will lead to extinction of polar bears in this location because they can't get their food which leads to their death.
So we can conclude that extinction occurs due to the climate change in the polar regions of the earth.
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Answer:
- prey-predator relationship
- increased biomass in the quaternary level
Explanation:
:)
Rivers and streams are biodiverse ecosystems that are sensitive to change. please select the best answer from the choices provided t f
It is true that rivers and streams are biodiverse ecosystems that are sensitive to change. Details about rivers and streams can be found below.
What is river and stream?A river is a large and often winding stream which drains a land mass, carrying water down from higher areas to a lower point, oftentimes ending in another body of water, such as an ocean or in an inland sea.
On the other hand, a stream is a small river or a body of moving water confined by banks.
Rivers and streams are both freshwater ecosystems, hence, tend to respond to changes in their environment caused by anthropogenic activities.
Therefore, it is true that rivers and streams are biodiverse ecosystems that are sensitive to change.
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Answer:
True
Explanation:
What type of plant is this?
I believe that is a rubber plant
Hope this helps!
What are the 3 layers within this organ?
Answer:
the epidermis, dermis, and the hypodermis
Explanation:
Select the correct answer from each drop-down menu. some vitamins are mostly found in animal-based foods, while some vitamins are abundant in plant-based foods. the best source of vitamin c is , while is naturally rich in vitamin b12.
The best source of vitamin c is strawberries.
Fish is naturally rich in vitamin b12.
What is vitamin?Vitamins are essential substance and mostly plant base substances that needed in small quantities and are consumed by man to improve the healthy wellbeing.
Vitamins can be water soluble or fat soluble.
Therefore, The best source of vitamin c is strawberries.
Fish is naturally rich in vitamin b12.
The question is incomplete as the options are not given, below are the options below.
cheddar cheese, strawberries, lentils Second blank: fish, broccoli, peanut butter
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Homeostasis is the condition the body is in when all substances or variables in the body are at an ideal state. If necessary, feedback mechanisms kick in to maintain homeostasis by producing hormones. The pancreas is a gland that produces the hormones insulin and glucagon. How do the hormones of the pancreas maintain homeostasis?
Together the insulin and glucagon help maintain a state is known as homeostasis in which conditions inside the body remain steady.
What is homeostasis?Homeostasis refers to the mechanism of the body to maintain a stable internal environment instead of changes taking place in the external environment.
When blood sugar is too high, the pancreas secretes more insulin. When blood sugar levels drop, the pancreas releases glucagon to raise them.
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What changes occur in the gastric chyme(mixture of food inside stomach) when it passes to duodenum?
Answer:
Explanation:
Chyme passes from the stomach into the duodenum. There it mixes with bile and pancreatic juices that further break down nutrients. Finger-like projections called villi line the interior wall of the small intestine and absorb most of the nutrients.
How can reduced precipitation lead to limited water availability? a. reduced precipitation leads to overuse. b. precipitation is a nonrenewable resource. c. reduced precipitation is a global event. d. reduced precipitation may lead to drought. please select the best answer from the choices provided a b c d
Reduced precipitation lead to limited water availability in such a way that (D). reduced precipitation may lead to drought.
Meaning of PrecipitationPrecipitation can be defined as any form of water either liquid or solid that is formed in the atmosphere and falls down to the earth as rain, snow, hail and sleet.
Precipitation is one of the major part in the global water cycle.
Precipitation is so important because it tends to determine the amount of water that is on earth and in the atmosphere.
In conclusion, Reduced precipitation lead to limited water availability in such a way that reduced precipitation may lead to drought.
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