Answer:The promoter is found in the DNA of the operon, upstream of (before) the genes. ... Some regulatory proteins are repressors that bind to pieces of DNA called operators. When bound to its operator, a repressor reduces transcription (e.g., by blocking RNA polymerase from moving forward on the DNA).
Explanation:
Whales, humans, lizards, and birds each have forelimbs that are adapted for different functions, including swimming, using tools, walking, and flying. While different in function, these forelimbs share a similar skeletal structure of the humerus, radius, and ulna. How does a comparison of the forelimbs of these organisms provide evidence for evolution?
A. These homologous structures indicate that these four organisms all share a common ancestor.
B. These analogous structures indicate that whales are descended from organisms that lived on land.
C. These analogous structures indicate that these four organisms all experienced convergent evolution.
D. These homologous structures indicate that humans, whales, and birds all evolved from a lineage of lizards.
Answer:
A. These homologous structures indicate that these four organisms all share a common ancestor.
Explanation:
Homologous structures mean the organs will have similar structure, but not necessarily function (human arm vs whale's flipper). While analogous structures are similar in function but not structure (wings of an airplane vs wings of a bird). Since the question states that they are similar in skeletal structure, we know they must be homologous structures, thereby eliminating B and C. D is not a choice because the question does not provide anything about the order of evolution. Therefore the answer is A. These homologous structures indicate that these four organisms all share a common ancestor.
GIVING BRAINLIEST!!!
A lake is home to a large number of trout. Identify what is most likely to happen if a chemical is dumped into the lake.
I. The trout will not be affected by the pollution.
II. The number of trout will increase.
III. The trout will suffer from disease.
A) I
B) I and II
C) III
D) II and III
Answer: C
Explanation: The process that occurred in the lake is natural selection. In the presence of an external environmental influence such as pollution, only the trouts that were fit to survive or in other words those that have the alleles that help in adapting to the new conditions live and increased in numbers. In such a case, one can say the fittest of the organisms survived and the corresponding allelic frequency in that population increased over time. The organisms carrying the other alleles died due to pollution and hence the overall frequency of alleles change.
A lake is home to a large number of trout the trout will suffer from disease is most likely to happen if a chemical is dumped into the lake. The correct option is C.
What is chemical pollution?Chemical pollution is the contamination of our environment with chemicals that are not naturally present.
According to scientific evidence, the trout in option will most likely suffer from disease.
Chemical pollution can harm aquatic life, including fish, by lowering oxygen levels, changing the pH balance of the water, and introducing toxins into their food chain.
Exposure to such chemicals can weaken the fish's immune system, making them more vulnerable to disease.
Option B and A is also less likely to be true because the introduction of chemicals into the water can disrupt the ecosystem's balance and affect the availability of food and oxygen, causing the trout population to decline.
Thus, the correct option is C.
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Which do solar flares and coronal mass ejections have in common? Select the two correct responses.
A. They appear as dark spots on the sun's surface.
B. They tend to occur during minimum points in the solar cycle.
C. They are caused by the sun's changing magnetic field.
D. They are explosive events that can affect Earth.
C. They are caused by the sun's changing magnetic field.
D. They are explosive events that can affect Earth.
Explanation:
I'm sorry if it is wrong but I am almost 100% that it is correct!
Have a good one!
The solar flares and coronal mass ejections are caused by the sun's changing magnetic field. Also they are explosive events that can affect Earth. The correct options are C and D.
What is solar flare?A solar flare is a massive explosion on the Sun caused by the sudden release of energy stored in 'twisted' magnetic fields.
However, not all solar flares are safe. While the Earth's magnetic field protects us from solar radiation, the sheer electromagnetic power of a flare disrupts power grids, internet connections, and other communication devices.
Ejections occur at varying rates depending on the phase of the solar cycle, ranging from about 0.2 per day near the solar minimum to 3.5 per day near the solar maximum.
Coronal Mass Ejections are large plasma and magnetic field expulsions from the Sun's corona.
The sun's changing magnetic field causes solar flares and coronal mass ejections. They are also explosive events that can have an impact on Earth.
Thus, the correct options are C and D as per the given scenario.
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To take in matter or energy
collection
liver
composition
absorption
Ok
Karen felt dazed and lightheaded one evening. She then developed a headache, so she took 2 aspirin and went to sleep. When she woke up, she could not move her right arm, she was experiencing tingling sensations in her limbs, and had a hard time with her balance. She called for help and when the ambulance arrived, Karen was confused and unable to form words, but could understand the EMT. Evaluation at the ER determined she had an ischemic stroke
it was bc karen didnt get to yell at any managers, casing her illness
WILL MARL BRAINLIEST IF ANSWERED CORRECTLY. PLEASE HELP!!!!! Which statement describes the differences van Neil discovered between how
purple sulfur bacteria perform photosynthesis and how other organisms
perform photosynthesis?
A. Purple sulfur bacteria use sulfur instead of water, do not require
light, and release hydrogen sulfide.
B. Purple sulfur bacteria use hydrogen sulfide instead of water, do
not produce oxygen, and release sulfur.
C. Purple sulfur bacteria use sulfur instead of water, do not produce
oxygen, and release hydrogen sulfide.
D. Purple sulfur bacteria use hydrogen sulfide instead of water, do
not require light, and release sulfur.
Answer:C
Explanation:
i took the test
Which statements describe the characteristics of an individual protein? Select two options.
It is specific to one biochemical reaction.
It increases the activation energy needed for a reaction.
It can catalyze many different reactions.
It increases the rate of a biochemical reaction.
It slows down the rate of a biochemical reaction.
Answer:
A, D
Explanation:
I just took the test on edge
Answer:
The answer to this car is A.)It is specific to one biochemical reaction, D.)It increases the rate of a biochemical reaction.
Explanation:
Hope this helps :) !!!!!!!!!!!!!!
what came first the egg or the chicken cause if the chicken came first how did the chicken get there same with the egg how did the egg get made im so confused i need answers
Answer: My theory was that they both were created at the same time. So if they both were created at the same time, then I guess that would solve this whole infinite loop thing. If the chicken came first, then it had to have come from an egg. So that means if the egg came first, where did that egg come from? A chicken. So its just a whole infinite loop. So thats what I think.
Explanation: Hope this spiked your interest.
Describe a problem in your life and an invention that would solve that problem.
Answer:
A problem in my life that I have is when I am cooking. When I need to cook something on the stove I use butter on the pan so it won't stick. But getting out that block of butter and trying to cut a perfect slice of butter is always such a freakin hassle. So, a squeezable butter or a butter slicer mechanism that can use would be fantastic.
Or, how about when I use peanut butter. When I use peanut butter for like a PB and J I try to scrape the excess peanut butter back into the jar and whatevers left in the jar but then whats left on the knife is such a pain to wash off. so like a really good scrubber to help wash off peanut butter would be cool.
Explanation:
I have so many life problems
Many discoveries and inventions are required for people's better health or living conditions, such as an inhaler for asthma patients, which helps and allows them to enjoy their lives, or the invention of devices such as computers, etc., which connect people all over the world.
What is the importance of inventions?In general, inventions have the potential to improve people's lives, solve problems, and make tasks easier or more efficient, such as the invention of digital platforms, robots, etc, that help humans in different ways. They can also contribute to the advancement of science and technology and drive economic growth and an invention can have a large impact on society and change people's lifestyles.
As a result, numerous discoveries and inventions are required for people's better health or living conditions, such as an inhaler for asthma patients, which helps and allows them to enjoy their lives, or the invention of devices such as computers, etc., which connect people all over the world.
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Explain the importance of enzymes in a
chemical reaction.
Answer:
Enzymes allow many chemical reactions to occur within the homeostasis constraints of a living system. Enzymes function as organic catalysts. A catalyst is a chemical involved in, but not changed by, a chemical reaction. Many enzymes function by lowering the activation energy of reactions.
Explanation:
- Eijiro <3
Why is Gene Therapy considered an effective (helpful) method to treat genetic disorders?
A) It enables a diseased cell to self-correct and fix its own defective (non-working
gene
B) It increases the likelihood (chance) of passing genetic mutations to offspring
C) It replicates resistance genes in the cells of unhealthy individuals
D) It replaces a defective gene with a healthy gene
Answer:
D) It replaces a defective gene with a healthy gene
Explanation:
Gene therapy is the process of replacing defective genes with healthy ... genes to help the body fight or treat disease, or deactivating problem genes.
What main hormone that is released by the female ovaries is?
A. Estrogen
B. Eggs
C. Oxytocin
D. Testosterone
Answer:A
Explanation:
please help! will give brainlist!
how can you call something “alive“? All living things share certain characteristics.
Part A: List the nine characteristics of life
Part B: choose three of the characteristics of life. Give an example of each that describes how that characteristic contributes to the organism survival.
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life
Explanation:
How do the characteristics of an organism contribute to their survival?
what does a centromere hold together?
Answer:
Structure in a chromosome that holds together the two chromatids
Explanation:
which type of tooth is mainly responsible for mechanical digestion
which substance is the focal point of climate models such as sea ice, heat and salinity exchange, and phase changes?
A. Methane
B. Carbon dioxide
C. Water
D. Nitrogen gas
Carbon dioxide is the focal point of climate models. The correct option is B.
What are climate models?Climate models, also widely recognized as general circulation models, employ mathematical equations to describe how matter and energy interact in various areas of the ocean, atmosphere, and land.
Its focal point is carbon dioxide that can correlate with sea ice, heat and salinity exchange, and phase changes.
Thus, the correct option is B.
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which drug is a depressant?
a) nicotine
b)alcohol
c)caffeine
d)antibiotic
I am made of many cells. My cells have an organized nucleus. I have two parents and eat only meat. Who am I?
Which organelle will you NOT find in an animal cell?
A.ribosome
B.vacuole
C.chloroplast
D.lysosome
Answer:
c
Explanation:
choloroplast because of heterotrophic
What is the role of retina?
Answer:
It is where images are formed.
Explanation:
The retina has two light sensitive cells;
rods- responsible for dim light.
cones- responsible for bright light
I need help with this question, thankss
Answer:
The Moon moves around Earth until the Moon is between the Sun and Earth.
Explanation:
* Which proces best explains how antibiotic resistance in bacteria can occur?
pls help
Answer:
Antibiotic resistance is a consequence of evolution via natural selection.
Explanation:
The antibiotic action is an environmental pressure; those bacteria which have a mutation allowing them to survive will live on to reproduce. They will then pass this traits to their offspring which will be fully resistant generation
Which of the following statements about energy producing technologies is true?
A. Some currently used energy producing technologies have no disadvantages
B. Alternatives to non-renewable energy sources can be as effective
C. Air pollution is common to all energy producing technologies
D. Alternatives to non-renewable energy sources are typically more damaging to the environment
Answer:
b. Alternatives to nonrenewable energy sources can be as effective.
Explanation:
Answer: b. alternatives to non-renewable energy sources can be as effective
hope this helps :)
Explanation:
i just took the test
3. How would the bat population influence the number of cactus fruit that develop?
!!!!!!!!!!!!!!!!!!!!!!!!!
As the months pass, the table shows that the number of bats also causes an increase in the number of cactus flowers and fruit.
The cactus fruit don't seem to form in large number until the cactus flowers are also going up more in number. This is because pollination is necessary to form the fruit.
Based on this information:
The more bats in the population, the more pollination takes place, and the more cactus fruit is available as a result.
However, if the bats hit carrying capacity, they will be at a population number that is now bad for the number of cactus fruit, since there won't be enough food to feed the population- as more bats eat more fruit, the cactus isn't able to keep up with growing enough fruit to feed the bats at carrying capacity.
plsss help!!!
Which of the following images show high air pressure? (2 points)
A and B
A and D
B and C
C and D
the answer is A and D
Answer:
creo que es la c
Environmentalists are monitoring an area of tropical forest that is being
deforested because of human activities. The graph here shows the scientists'
predictions based on the data they have collected.
Tropical Forest Deforestation
100
100
80
80
70
60
53
Percentage of
Trees Remaining
40
20
10
0
2010
2015
2020
2025
2030
2035
Year
How is the ecosystem likely to change as a result? Select the two correct
answers.
Answer:
its 100
Explanation:
The ecosystem is likely to change as a result of Loss of habitat and Decrease in biodiversity. The correct options are C and D.
What is the meaning of ecosystem?It is biological system is a geographical region in which plants, animals, and other organic entities, as well as climate and environment, work together to form an air pocket of life.
As a result of deforestation, the ecosystem is likely to change in the following ways:
Loss of habitat: Deforestation is the destruction of forests, which results in the extinction of many forest-dwelling species.Reduced biodiversity: Deforestation reduces biodiversity in the ecosystem because many forest species are unable to adapt to the new conditions and may become extinct.Thus, the correct options are C and D.
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HELP!!! 50PTS!!!!!!
Recent research investigating variation in human height has found that a variety of genes at different loci, as well as early nutrition, influence height, especially the nutrition of a mother during gestation (the period of time during development of a fetus) and of a child during childhood years,. Given this information, which of the following is correct? (3 points)
For human height, the environment is more influential than inheritance of particular alleles.
One phenotypic trait is usually related to one gene.
Phenotypes are directly linked to genotypes and not influenced externally.
Phenotypes are usually the result of a combination of genes and influence of the environment. I think is D
Answer:
It's the fourth one:
Phenotypes are usually the result of a combination of genes and influence of the environment.
Explanation:
Genes and the environment both affect phenotype.
Phenotypes are usually the result of a combination of genes and the influence of the environment.
What is genes?
In biology, a gene is a basic unit of heredity and a sequence of nucleotides in DNA that encodes the synthesis of a gene product, either RNA or protein.
During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes (many different genes) as well as gene–environment interactions. Some genetic traits are instantly visible, such as eye color or the number of limbs, and some are not, such as blood type, the risk for specific diseases, or the thousands of basic biochemical processes that constitute life.
Genes can acquire mutations in their sequence, leading to different variants, known as alleles, in the population. These alleles encode slightly different versions of a protein, which cause different phenotypical traits. Usage of the term "having a gene" (e.g., "good genes," "hair color gene") typically refers to containing a different allele of the same, shared gene.Genes evolve due to natural selection / survival of the fittest and genetic drift of the alleles.
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Dan Perkins was a policeman who was able to run a short distance in a very short time in order to escape the danger of a fire. What molecule allowed him to have a burst of instant energy to make that sprint?
Answer:
Adrenaline
Explanation:
The is the burst of energy caused by enzymes that send messages to the brain.Thus,resulting in Flight or Fight mechanism.
The heart is the most
important organ in the
circulatory system. What is
the main function of the
circulatory system?
Answer:
The main function of the circulatory (or cardiovascular) system is to deliver oxygen to the body tissues, whilst simultaneously removing carbon dioxide produced by metabolism.