Answer:
The correct answer is Melanocyte.
Explanation:
Took the test:)
Which of the following is a correct example of short-loop negative feedback?
A) Thyroid hormones inhibit the release of TRH.
B) Thyroid hormones inhibit the release of TSH.
C) TRH stimulates the release of thyroid hormones.
D) TSH inhibits the release of TRH.
E) TRH inhibits the release of TSH.
The following is a suitable illustration of brief negative feedback where TSH limits TRH release.
Does TSH interfere with TRH?The pituitary gland's TSH induces thyroid hormone release, which is triggered by the thyroid-releasing hormone TRH produced by the hypothalamus. Thyroid epithelial cells shut down as thyroid hormone blood concentrations rise because they suppress both TSH and TRH.
What stops the TRH from being released?Energy-demanding conditions, such as coldness and exercise, and the HPT axis are stimulated, but the axis is suppressed by conditions that disrupt the energy balance, such as fasting, inflammation, or long-term stress.
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What causes increase in rate of cell growth and size?
Cells can grow by increasing the overall rate of cellular biogenesis such that biomolecule production exceeds the overall rate of cellular degradation of biomolecules by proteasomes, lysosomes, or autophagy.
In a typical mammalian dividing cell, proliferation occurs in her G1 phase of the cell cycle and is closely coupled with the S phase (DNA synthesis) and M phase (mitosis). The combined effects of growth factors, hormones, and nutrient availability provide external signals for cell growth.
Cell growth, proliferation and differentiation are primarily controlled by selective transcriptional regulation of gene expression in response to extracellular stimuli. Much of this transcriptional regulation is regulated by the action of sequence-specific transcription factors.
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Which of the following parts of a plant remains on the plant even after several years of growth?
A) Primary xylem B) Primary phloem C) Epidermis D) Cortex
The basic xylem still seems to be present close to the pith even when the plant has grown for a considerable amount of time.
What is the term for a plant's longer growth?Because they permit primary growth, also known as height and height expansion, these three forms of rosette are referred to as primary meristems. With more meristems, broadleaf weeds have the potential to grow larger. Secondary growth does not occur in herbaceous plants.
What is the name of the sprout that lengthens stems and roots?Meristems affect primary, secondary, and tertiary growth. The medial meristems, also known as the vascular system, govern secondary growth whereas root organizational meristems that continue to shoot apical cell structures regulate primary growth.
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What has occurred in both cells immediately before this process?
A. A cell nucleus has divided by mitosis.
B. Two cells have migrated to join together.
O
C. A cell wall has increased in size.
D. A cell has grown larger, without mitosis occurring.
E. The cytoplasm has gradually solidified.
Answer:
Option A is the correct one.
Explanation:
A cell nucleus has divided by mitosis. ... During the cell cycle, compounds called cyclins increase and decrease in a regular pattern.
Answer:
A. A cell nucleus has divided by mitosis.
this is your answer
hope it is helpful to you
Which type of weathering involves the outer layers of rock peeling off due 1
to the rock expanding as it is heated and contracting as it cools?
Hydration
Exfoliation
Oxidation
Tree Root Action
Answer:
Exfoliation
Explanation:
it peels of my teacher said it like an onion
Answer:
Insolation weatheringExplanation:
Expansion of rock surface when heated by the Sun followed by contraction as the temperature falls can allegedly weaken bonds along grain boundaries and cause subsequent flaking off of rock fragments or dislodging of mineral grains. This is called insolation weathering.
12. Atoms can have different numbers of which of the following?
a. electrons
C. neutrons
b. protons
d. all of the above
Answer:
A. Electrons.
Explanation:
Atoms and elements in the periodic table are numbered based on the number of electrons it has.
The exchange of segments of DNA between the members of a pair of
chromosomes
1. acts as a source of variations within a species.
2. is called crossing
3. ensures that variations within a species never occur.
4. always produces genetic disorders.
Please help I’ll give brainly
Answer:
The exchange of segments of DNA between the members of a pair of is called crossing
hope it is helpful to you
The exchange of segments of DNA between the members of a pair of chromosomes acts as a source of variations within a species. Therefore, the correct option is A.
Genetic recombination, also called crossing over, occurs when DNA segments from one chromosome are exchanged for those of another. This process has several important implications for genetics. It serves as the primary source of genetic diversity within a species. New allelic combinations arise as a result of the exchange of DNA segments between homologous chromosomes during crossing over.
Therefore, the correct option is A.
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match the plant structures and functions they perform with the process that they are supporting for the plant
1. The stamen relates to _____ by producing pollen/ sperm
2. The stomata relate to _____ by allowing oxygen to enter the plant
3. The leaf relates to _____ because its cells are numerous in chloroplasts
4. The root relates to _____ by forming the first parts of the plant
5. The leaf relates to _____ because its surfaces are covered in a waxy cuticle
Word bank:
Cellular respiration
Reproduction
Growth
Transpiration
Photosynthesis
Answer:
Reproduction
Transpiration
Photosynthesis
Growth
Cellular respiration
Explanation:
Which is most likely to change with new discoveries and technologies?
classification of organisms
kingdom of an organism
order of the taxonomic levels
use of binomial nomenclature
Answer:
Option A is the correct one
Explanation:
When scientist find new species that may have to change classification systems in order to accommodate them. DNA sequencing has also let us find out more about evolutionary relationships. ... The more recent the common ancestor, the more closely related the two species are.
Answer:
classification of organisms is most likely to change with new discoveries and technologies .
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A researcher discovers a mysterious unknown multicellular eukaryotic organism. She would be confident that it is an animal if she observed that it ____
A researcher discovers a mysterious unknown multicellular eukaryotic organism. She would be confident that it is an animal if she observed that it has specialized organs, such as eyes, ears, or a heart, or if it moved in response to its environment.
Animals are a distinct group of multicellular eukaryotes, and they are characterized by the presence of specialized organs that aid in the collection of energy and nutrients, as well as providing a means for locomotion. These organs can be as simple as a single cell like the cilium on a paramecium, or as complex as the human brain. Additionally, animals usually respond to their environment in some way, such as locomotion or behavioral responses.
The researcher's observation of specialized organs and movement in response to its environment would be a strong indication that the organism is an animal. By looking at the size, shape, and organization of the cells under a microscope, the researcher could further confirm the identity of the organism. For instance, the presence of cilia or flagella would suggest that the organism is a protozoan, while the presence of an organized nervous system could indicate that it is a more complex organism, such as an arthropod or a vertebrate.
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-would you expect someone with emphysema to have a greater or lesser vital capacity than someone without the disease ? why?
It is expected someone with emphysema has a lesser vital capacity than someone without the disease simply because it decreases the ability to recover air during the process of breathing.
What is an emphysema medical condition?An emphysema medical condition may be considered as a health problem that decreased the ability of the lungs to take air due to impairment in the process of exhalation, which causes shortness of breathing responses in the individual affected by this problem. Emphysema is caused by injuries that are able to affect the air sacs present in the lung tissues, which decrease the ability to interchange gases (oxygen and carbon dioxide) during respiration.
Therefore, with this data, we can see that emphysema is a medical condition that decreases the ability to breathe and thus also it is detrimental to the vital capacity of the lungs.
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A community is different from a population because
Answer:
A population is different from a community because population means a group of individuals of the same species and community means any and all living creatures
Why is firewood considered a limited resource ?
A. People are not practicing sustainable wood harvesting
B. Wood is used in place of money to trade for food
C. Fuelwood allows people to purify their water by boiling it
D. Fuelwood allows people to cook their food .
An increase in water-borne diseases could possibly be alleviated by.
A. Adequate sewage treatment facilities for growing populations.
B. Very rapid growth of large cities.
C. Sufficient fuelwood
D. Both A and D.
Which of the following would not be a characteristic of a country on the least developed countries list ?
A. Extremely poor nutrition, health, and education
B. Extremely high poverty levels- making about $2.00 per day .
C. Distinct developmental progress
D. Aided by the UN finically
Most countries are tending towards replacement level fertility rates by 2050. What does this mean for world population growth in the future past 2050?
A. Population growth will become population loss
B. Population growth will eventually stop
C. The population will continue to grow
D. None of the above .
I know for the last question the answer isn’t A .
I know question three isn’t answer B.
I know question 1 isn’t answer C.
Answer: A- People are not practicing sustainable wood harvesting
A- Adequate sewage treatment facilities for growing populations.
C- Distinct developmental progress
D. None of the above .
Explanation:
Why are there typically fewer organisms at the top of an energy pyramid?
Select the three hypotheses.
Grass prevents erosion when planted on a hillside.
Eating sweets may affect weight gain in children.
Brand X battery maintains a charge longer than brand Y.
Hummingbirds are aggressive animals.
A child will catch a cold if she plays in the rain.
If a plant receives fertilizer, it will grow at a faster rate.
Answer:
Eating sweets may affect weight gain in children.
A child will catch a cold if she plays in the rain.
If a plant receives fertilizer, it will grow at a faster rate.
Hypothesis is an educated guess. It is necessary to have a Hypothesis before performing an experiment. There are also other steps or requirements you need before conducting experiments. A Hypothesis usually has what is known as an if-then statement. Example: If do da do, then this will occur. "IF" is the first part, "THEN" is the second part of the statement.
Who are the most prone of premarital sex?
Young people, particularly those in their late teens and early twenties, are more likely to engage in premarital sex due to various factors such as cultural and religious beliefs, education, and access to contraception.
It is difficult to make generalizations about who is most prone to engage in premarital sex, as sexual behavior can be influenced by a variety of factors such as cultural and religious beliefs, education, and access to contraception.
However, studies have shown that young people, particularly those in their late teens and early twenties, are more likely to engage in premarital sex than older individuals. Additionally, those who have a higher level of education, greater access to contraception, and more liberal attitudes toward sex may be more likely to engage in premarital sex.
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A large population of rock pocket mice with various fur colors lives in a designated area. Several generations after a volcanic eruption, the frequency of the different colors within the population has changed. What color of rock pocket mice would be most prevalent in the population and why?
The most prevalent color of the rock pocket mice would be sandy-colored fur, because of the light color of the desert rocks and sand on which they live.
What are rock pocket mice?The two varieties are light brown and dark brown-black (ancestral variation). Rock pocket mice of a dark tint can be found in environments with a lot of black lava rock.
Mice with light skin tones can be found in environments with sand and light-colored rocks.
Therefore, due to the light hue of the desert rocks and sand where they live, the rock pocket mice' fur would typically be sandy in color.
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How many is bicameral?
It is a two-house bicameral legislative body. India is however one instance, where each of its 28 states and the union both have two houses.
There are six states in India that have a bicameral legislature (Andhra Pradesh, Maharashtra, Karnataka, Orissa, Telangana, Bihar, and Uttar Pradesh). currently, 6 states in india have bicameral legislatures. previously, there were 7 states, but 6 states now exist as a result of jammu and kashmir being a union territory. in a bicameral legislature, there are two houses that make up the legislature. A legislature having two houses is referred to as bicameral. The Lok Sabha & Rajya Sabha are the two houses of the Indian Parliament. There are just a few states in India that also have a bicameral legislature made up of the Vidhan Sabha & Vidhan Parishad, whereas most only have the Vidhan Sabha.
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If otters that are brown & white combine to make a new 3rd phenotype, a tan otter,
what type of dominance is being exhibited?
-Partial Dominance
-Incomplete Dominance
-Codominance
-Mendelian
Answer:
Incomplete Dominance
Explanation:
Several inheritance patterns exist which do not follow Mendel's inheritance pattern called NON-MENDELIAN INHERITANCE. Some of them are incomplete dominance, co-dominance etc.
Incomplete dominance is a situation whereby two alleles of a gene are neither dominant nor recessive over one another, hence, they combine in an heterozygous state to form an intermediate third phenotype that is different from both parent's phenotypes.
This is the case in this otters that have brown and white phenotypes (colour). However, they combine to make a new 3rd phenotype.
Answer:-Incomplete Dominance
Explanation:
Runoff from farms that use fertilizers is entering a small lake. This will most directly affect the lake by causing
A the lake to dry up.
Balgae to grow in the lake.
water in the lake to become solid.
D
the lake to become deeper.
Answer:
B. algae to grow in the lake.
Explanation:
Because it is the "Correct Answer"
The leaves of which plant below show the best structural adaptation for protecting the plant from predators?
Answer
F
G
H
J
Answer:
the cactus
Explanation:
it has spikes that can harm the predator
Which of the following management practices attempts to minimize ecological impact by allowing some trees in a forest to grow to maturity
Getting unevenly aged stands through a selection process. Compared to even cutting, this uneven growth and trimming would boost biodiversity.
Tree stands that are uniform in age are all the same age. These trees are all of the same type and are planted at the same time. Therefore, setting up a biosphere reserve is the most efficient strategy to preserve a region's plant diversity. Ex-situ methods of conservation, such as seed banks, botanical gardens, and tissue culture, involve removing organisms from their natural habitat. By sucking carbon dioxide out of the atmosphere and storing it, forests aid in reducing the rate of climate change. Since the excess of carbon dioxide in the atmosphere is the main cause of climate change, this is a direct consequence.
The complete question is - Which management practices attempts to minimize ecological impact by allowing some trees in a forest to grow to maturity?
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What happens when genetic diversity decreases?
Species can go extinct and be lost forever when genetic diversity decreases.
This is a result of despair brought on by inbreeding paired with a lack of ability to adjust to change. New alleles can be introduced in these situations to save the population. For a population to adapt to changing circumstances, genetic diversity is essential.
Genetic drift is a result of sampling error because individuals are randomly chosen when a population is sampled. A random selection is one in which each member of the population has an equal chance of being chosen.
The variety of various inherited features within a species is referred to as genetic diversity. There would be many people with a wide range of diverse traits in a species with significant genetic diversity. For a population to adapt to changing surroundings, genetic variety is essential.
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Some scientists believe that life on Earth began about 3.5 billion years ago. What do they base this belief on?
A wealth of scientific evidence supports the idea that life on Earth began about 3.5 billion years ago. This proof comes from different sources, including:
Fossil records: The oldest known fossils are approximately 3.5 billion years old, showing that there were already complex forms of life present on Earth at that time.
Molecular clocks: Scientists can use the rate of molecular evolution to estimate the age of different life forms. This method has consistently placed the origin of life on Earth at around 3.5 billion years ago.
Geochemical evidence: The chemical composition of rocks and minerals from the early Earth provide clues about the conditions that may have existed when life first emerged.
For example, the presence of certain types of organic molecules in these rocks suggests that the conditions were suitable for life to evolve.
Comparisons to other planets: Scientists have found evidence of water and other conditions that may have been necessary for life to emerge on other planets in our solar system, such as Mars.
If these conditions existed on other planets, it is likely that they also lived on Earth around 3.5 billion years ago, when life is believed to have originated.
Overall, scientific evidence suggests that life on Earth began around 3.5 billion years ago, although it is possible that it may have arisen even earlier.
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6. Plants and animals have tissues made up of ...
A many different kinds of cells
B cells that have multiple functions
C specialized cells
D cells without organelles
Although Burundi and U.A.E. have the same population of 9 million, why does Burundi have a smaller ecological impact?
Answer:
Due to the amount of money people make in Burundi they have a much smaller impact due to the fact they cant consume as much. With meat being
rare due to how expensive it have become. The average person in U.A.E make around 50x the average person in Burundi so they do consume more. So in the end the ecological footprint is much smaller in Burundi than in U.A.E.
Explanation:
The greater level of development in the UAE leads to greater ecological impact compared to Burundi even though the both countries have a population of 9 million people.
The level of ecological impact in a society is determined by the degree of infrastructural development that is available in that society. This is because, land resources that could have served as natural ecosystems are now utilized for infrastructural development thereby leading to adverse ecological impacts.
UAE is more has a greater level of infrastructural development compared to Burundi leading to a greater ecological impact since land and other natural resources are used up at an alarming rate to drive this infrastructural development.
Also, people living in the UAE have a greater access to modern facilities such as electricity compared to people living in Burundi thereby putting more pressure on the environment from which these resources are obtained ultimately leading to a greater ecological impact.
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cellaur repsiartion takes place in these important organellie in the cells
Answer:
Explanation:
It absorbs oxygen and releases carbon dioxide and energy. Thus, respiration takes place in the mitochondria of the cell. Mitochondria are also called powerhouses of the cell because they produce energy. Mitochondria are organelles whose membranes are specialized for aerobic respiration.
What type of rock is most likely to form in an earthquake zone?
O A. Sedimentary rock
O B. Metamorphic rock
O C. Extrusive igneous rock
D. Intrusive igneous rock
I need the answers ASAP
HELP!!
Answer:
(b)
Explanation:
Why are large scale mutations more obvious than small scale mutations ?
large scale mutations are more obvious because it affects more chromosomes in your DNA than small scale mutations.
example: Duplication of multiple genes causes those
genes to be overexpressed while deletions result
in missing or incomplete genes.