The field of evo-devo proposes that many major morphological changes result from changes in gene expression of regulatory genes.
The premise for this argument is that these changes cause modifications in the expression of downstream target genes, which then lead to alterations in structure and patterning.
Regulatory genes are those that control other genes, and changes in their expression can drastically alter the way in which an organism develops. Such changes can happen through mutations, whereby the regulatory gene acquires a new sequence, or through alterations in the timing and location of the gene’s expression.
For example, a mutation in a regulatory gene could cause the gene to be expressed at a different stage of development, leading to changes in the patterning of the organism’s morphology.
Alternatively, mutations in regulatory genes could cause the gene to be expressed in a different tissue, resulting in modifications of tissue structure. Through these changes in gene expression, major morphological changes can occur, allowing new species to emerge over evolutionary time.
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Explain the difference between afferent and efferent neurons.
will give brainliest
Answer:
Neurons that receive information from our sensory organs (e.g. eye, skin) and transmit this input to the central nervous system are called afferent neurons. Neurons that send impulses from the central nervous system to your limbs and organs are called efferent neurons.Explanation:
Hope this helps you !!nerve impulses from the brain travel down the ____ to relay electric message impulses.
Nerve impulse from the brain travel down the spinal cord to relay electric message impulses.
To transmit electrical signals, nerve impulses from the brain go down the spinal cord. The spinal cord, which runs from the base of the brain down the vertebral column, is a lengthy, cylindrical bundle of nerve fibres. It acts as a channel of communication between the brain and the body as a whole. These nerve impulses go down the spinal cord through a number of descending nerve tracts when the brain delivers signals to begin a voluntary movement or transmit sensory data. These tracts are made up of axons that convey electrical signals from the brain to particular parts of the body, enabling the coordination, sensation, and motor control of bodily operations.
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Coastal wetlands are ecologically important because they do all of which of the following a. reduce the impact of storms coming inland b. harbor a low level of biodiversity c. help to destroy nutrients d. provide important habitats for only terrestrial species e. repel large aquatic reptiles
Answer: The answer is e
Explanation:
Parthenogenesis is:
Select one:
a. Reproduction without fertilization
b. Asexual reproduction
c. Reproduction through spores
d. Reproduction through mitosis
parthenogenesis is the reproduction without fertilization
it is the process by which female produce baby without the involvement of male
which group of genes in drosophila embryos must be mutated if the result is elimination of a significantly sized, contiguous region of segmentation?
The group of genes in Drosophila embryos must be mutated if the result is the elimination of a significantly sized, contiguous region of segmentation is gap genes.
What are gap genes?
Gap genes are a group of genes that are expressed throughout the central region of the Drosophila embryo. Gap genes, along with other segmentation genes, are responsible for establishing the boundaries between segments in the developing Drosophila embryo. Gap genes are classified into three broad categories: anterior, middle, and posterior, based on their expression patterns.
Gap genes in Drosophila are required for correct patterning of the anterior-posterior axis of the embryo. Gap genes are necessary for defining the broad regions of segmentation, which are then subdivided into smaller regions by pair-rule genes. The proper patterning of the Drosophila embryo requires the activity of gap genes.
In contrast to maternal genes, which establish the anterior-posterior axis of the embryo, gap genes define large, contiguous regions of the developing embryo and are necessary for setting up the basic body plan.
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The image shows barrels containing toxic waste that were dumped into a body of water.which is the likely effect of the dumping on this ecosystem?
Answer:
The ecosystem will become sick and die.
Explanation:
The toxic waste can travel to other bodies of water, whether it be a river or waterfall. This can contaminate and poison the water, as well as the organisms living inside it. This will harm fish, birds, plants, animals that drink the water, etc.
What is the natural source of energy in Mars and how is created, fission of fusion?
Answer:
Fission and fusion are two processes that alter the nucleus of an atom. Nuclear fission provides the energy in nuclear power plants and fusion is the source of the sun's energy. The use of fission in power plants can help conserve fossil fuels.
Explanation:
Branches that may occur along an axon are called: A) hillocks. B) collaterals. C) telodendria. D) dendrites.
Answer: An axon typically develops side branches called axon collaterals,
Explanation:
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In order to clone a gene, a gene is inserted into a.
Give an example of carbon atoms getting into the geosphere and one for the atmosphere:
Answer:1) Carbon moves from atmosphere to hydrosphere and biosphere in the process of photosynthesis and to lithosphere by deposition of dead bodies while from hydrosphere and biosphere, carbon can be move in the process of respiration by animals.
2) During respiration process which takes place in plants in which carbondioxide is released and by eating carbon containing food by animals. By decomposing the food, carbon is releases in the form of carbondioxide.
3) Carbon can be used by the marine plants in the process of photosynthesis and during the process of diffusion, carbon is also dissolve in water bodies.
4) When the plants and animals die, the carbon which is present inside their body is buried in the soil present at the bottom of the ocean and the shells and corels of some animals also contain carbon which is soon be the part of the lithosphere when they die.
5) After the decomposition of seashell, carbondioxide is produced because shells are made up of calcium carbonate.
Explanation:
Write three advantages of breathing through the nose than through the mouth
Answer:
reduce exposure to foreign substances. humidify and warm inhaled air. increase air flow to arteries, veins
Although bacteria and other single-celled organisms can produce genetically identical offspring. they sometimes still exchange DNA be passing it from bacteria to bacteria. What might be the advantage of exchanging DNA in this way?
p
Answer:
Bacteria, like all living organisms, have evolved at least one autonomous mechanism, conjugation, for exchanging portions of genetic materials between two related cells. The ecological benefits of conjugation include the expansion of metabolic versatility and resistance to hazardous environmental conditions.
Explanation: Hope this helps
A truck spilled oil due to an accident in a lake inhabited by pink flamingos, algae and shrimps. The oil causes the death of shrimps and algae.... what will be the effect of this on the flamingos?
Answer:
The flamingos will not be able to eat algae and shrimp, thus the food chain will slowly get unbalanced, and then everything will stop
Explanation:
How is a savanna a natural biome?
Answer:
The savanna biome, which is a type of grassland biome, consists of areas of open grassland with very few trees. There are two kinds of savannas: tropical and semi-tropical
Explanation:
According to the environment-industry-organization fit model, cell 2 represents which of these environments?
According to the environment-industry-organization fit model, cell 2 represents the stable environment.
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Calculate the magnification of an object with length 4cm , if the length of the drawing is 40cm
Answer:
-0.33
Explanation:
for this program, you will take an input file that contains a small sequence of dna found in a sample, along with several candidates for matches. (in essence, you are trying to identify, which if any of the candidates has the same dna as found in the sample.)
. The program will analyze the DNA sequences using various algorithms and methods to identify any matches and provide a detailed report of the findings.
for the program, you will need an input file that includes a small sequence of DNA found in a sample, as well as several potential matches. The goal of the program is to determine which, if any, of the candidates have the same DNA as the sample. This process is commonly known as DNA sequencing and is used in a variety of fields such as forensics, medicine, and agriculture. The program will analyze the DNA sequences using various algorithms and methods to identify any matches and provide a detailed report of the findings.
In order to create a program that identifies the matching DNA sequence among several candidates, you will need to perform the following steps:
1. Read the input file containing the DNA sample sequence and the candidate sequences.
2. Compare the sample sequence with each candidate sequence.
3. Identify the candidate(s) with the same DNA sequence as the sample.
4. Output the result.
By implementing these steps, you can successfully determine which candidate(s) share the same DNA sequence as found in the sample.
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Salted meats, jams, and honey discourage microbial growth. These are examples of how can control microbial growth. O osmotic pressure O heat O hydrostatic pressure O isotonic conditions
The control of microbial growth can be achieved through the use of various techniques. Salted meats, jams, and honey are some examples of the methods that can be used to control microbial growth.
The following is a discussion of these methods:
Salted Meats:Salt is used in meats to limit the growth of bacteria. Meat is treated with salt, which draws out the moisture and reduces the water content, which slows down the growth of bacteria. The bacteria require water to survive, and when the moisture level is reduced, they are unable to survive. salting meats is a common way to preserve them.
Jams:Jams are made from sugar, which is a natural preservative. Sugar reduces the water activity of the jam, making it difficult for bacteria to survive. Bacteria require water to survive, and when the water content is low, the bacteria cannot grow. The sugar content of the jam also helps to create an acidic environment, which is another factor that inhibits bacterial growth.
Honey:Honey is an excellent antimicrobial agent due to its high sugar content, low pH, and the presence of hydrogen peroxide. The high sugar content of honey makes it difficult for bacteria to grow, while the low pH of honey creates an acidic environment that inhibits bacterial growth. Additionally, the hydrogen peroxide in honey is a potent antimicrobial agent that can destroy many types of bacteria.They create unfavorable conditions for the growth of microorganisms.
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FORENSIC SCIENCE!! When analyzing a strand of hair, investigators would first try to collect DNA from which general location?
Inside of the hair strand
The medulla
The hair tip/point furthest from the scalp
The point closest to the scalp
Answer:
The correct answer is - The point closest to the scalp.
Explanation:
In order to analyze a strand of hair investigators need to collect the DNA. To analyze a strand of hair the DNA must be nuclear DNA which can be found at the root of the hair near the scalp as the point, hair attached to the scalp there are cells that can provide the nuclear DNA. Any other section or the part of the hair strand does not contain the nuclear DNA so analyze DNA would not be possible.
Of the following plants, which stem has scattered vascular bundles? A. corn B. magnolia C. chrysanthemum D. hibiscus
Of the following plants, a. corn stem has scattered vascular bundles.
How do vascular bundles work?The transport system in vascular plants includes vascular bundles. The actual transport takes place in the stem, which comes in the xylem and phloem forms. A vascular bundle, which also contains supporting and protecting tissues, contains both of these tissues. The Cambium, a tissue, is also present between the xylem and the phloem.
Phloem is often found farther from the axis than the xylem, which is typically adaxial (abaxial). This indicates that in a stem or root, the xylem is closer to the interior while the phloem is closer to the exterior. The upper side of a leaf is typically the adaxial surface, and the bottom side is the abaxial surface.
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What is the term for term for existing in or produced by the sea ?
Answer:
See synonyms for: marine / marines on Thesaurus.com. Elementary Level. adjective. of or relating to the sea; existing in or produced by the sea: marine vegetation. pertaining to navigation or shipping; nautical; naval; maritime.
where are mitochondrial proteins translated? question 4 options: in the cytosol in the mitochondria on the endoplasmic reticulum in both the cytosol and the mitochondria
Mitochondrial proteins translated in mitochondrial ribosomes.
Does mitochondrial translation of proteins occur?Specialized MIT ribosomes in mitochondria carry out translation. A large component (39S) and a small subunit make up mammalian mitochondrial ribosomes (28S). A 16S rRNA and 48 proteins make up the large subunit, whereas a 12S rRNA and 30 proteins make up the small subunit.
All MIT ribosomal proteins in humans are produced in the cytosol after being created in the cell nucleus and then transported into the mitochondria.
Translation is carried out by mitochondrial ribosomes that are attached to membranes and are also partially built in RNA granules (22, 23). However, it is unclear precisely where protein synthesis takes place in human mitochondria—whether at the CM, CJ, or IBM, within, beside, or distant from the RNA granules.
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Why is the thermosphere so hot?
Answer:
Because Solar Radiation
Explanation:
I remember learning this in class. Thermosphere temperature increase because it absorbs solar radiation from the sun.
You have come into possession of a plant with lavender flowers. Knowing that the plant is self-pollinating, you harvest its seeds and plant them. Of the 106 plants that grow from these seeds, 31 have white flowers. Using a Punnett square, draw conclusions about the nature of the allele of lavender flowers.
Answer:
The correct answer is - heterozygous for lavender flowers (Ll)
Explanation:
As it is given that out of the 106 plants, 31 had white flowers which are approximately 3:1 or one-fourth, of the plants. It suggests that white flowers have recessive alleles (ll).
So, the color flower would be dominant for both allele LL or heterzygous Ll and the Punnett square should show the self-pollination
L l
L LL Ll
l Ll ll
It shows that the ratio of 3:1 is possible when there is a heterozygous condition of the flower allele present.
2. Sam and Jerry are having a discussion in their Environmental Science lass. Sam
says that abiotic factors determine what biotic factors can be in an ecosystem. Jerry
says that biotic factors determine what abiotic factors can be in an ecosystem. Who
is correct? Use an example to support your answer. (2 points)
Answer:
Jerry is right.
Explanation:
Abiotic factors can kill biotic factors, so technically Jerry is correct, just think of it as a TDI game, let's say Chris is an Abiotic factor, and the campers are biotic factors, Chris chooses weather or not they stay.
Which is required for both anaerobic respiration and aerobic respiration?
O oxygen
water
O mitochondria
O glucose
which pathogen by being the smallest is able to spread and infect the greatest number of hosts
Answer:
bacteria is the pathogen
Answer:
Virus
Explanation:
A virus is the smallest pathogen and can spread easily.
Define translation (adding for extra letters cuz it had to be 20 characters long so ignore this)
Some form of early Homo is estimated to have evolved into Homo erectus around: O 5-7.5 million years ago
O 1.7-2 million years ago O 10,000-40,000 years ago O 50,000-70,000 years ago t
Some form of early Homo is estimated to have evolved into Homo erectus around 1.7-2 million years ago, option B is correct.
Homo erectus is believed to have evolved around 1.7-2 million years ago based on fossil evidence and dating methods. Fossil discoveries, such as the famous Nariokotome Boy skeleton found in Kenya, provide crucial insights into the anatomy and characteristics of Homo erectus. These fossils, along with other archaeological and genetic evidence, suggest that Homo erectus was the first hominin species to exhibit significant anatomical and behavioral differences from earlier hominins.
The emergence of Homo erectus marked a significant milestone in human evolution, as this species had a larger brain size, more advanced tool-making abilities, and potentially even the ability to control fire. These developments laid the foundation for the subsequent evolution of Homo sapiens, option B is correct.
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The complete question is:
Some form of early Homo is estimated to have evolved into Homo erectus around:
A) 5-7.5 million years ago
B) 1.7-2 million years ago
C) 10,000-40,000 years ago
D) 50,000-70,000 years ago
According to fossil records, the horses that lived 50 million years ago were much smaller, weaker and slower than modern horses. Which process is most likely responsible for the changes that have led to the increased size, strength, and speed in horses?Immersive Reader (1 Point) commensalism inbreeding migration evolution by natural selection
Evolution by natural selection.
survival of the fittest=natural selection