Which of the following correctly describes the result of genetic mutations when they occur in a body cell?
The individual may have an advantage that is beneficial for survival.
The mutation will be passed on to the offspring in certain circumstances.
The individual will have an extra chromosome resulting from non-disjunction.
The mutation may affect the individual but will not be inherited by the offspring.
URGENT PLEASE ANSWER
Jesi is on vacation and visited a seafood restaurant to eat a shrimp dinner. About thirty minutes after eating, she begins to feel ill and her stomach is rumbling. Shortly after, she begins to vomit. Jesi's body is experiencing a reaction to an ________ stimulus.
internal
response
external
biological clock
During a stressful or threatening situation, which of the following is the best description of how the nervous systems in your body would respond? The parasympathetic nervous system releases adrenaline and the sympathetic nervous systems calms the system back down. The parasympathetic nervous system senses the danger and the sympathetic nervous system responds by releasing adrenaline. The parasympathetic nervous system brings the system back to normal after the sympathetic nervous systems signals to release adrenaline.Which of the following scenarios is the best example of positive feedback? As blood pressure decreases, your heart rate increases. As blood pressure greatly decreases, blood flow decreases, and blood pressure drops more. As body temperature rises, you begin to sweat. As body temperature decreases, your body begins to shiver.
Answer:
The last 2 answers above are right but the first is wrong. The answer to number 1 is Internal. Hope this helps!
Explanation:
1)What subatomic particle determines what element the atom is?
protons
neutrons
electrons
nucleus
2)Rutherford's model of the atom is best described as
A) a dense, positively charged nucleus with electrons moving around the nucleus.
B)a dense nucleus of electrons with very little empty space.
C)a dense, positively charged nucleus with electrons on its surface.
D)had a nucleus of electrons, about which positively charged particles would orbit.
3) An atom of oxygen with 8 protons, 8 neutrons, and 8 electrons would have a mass number of ______.
A)4
B)16
C)24
4)The current model of the atom suggests that ______.
A)an electron cloud surrounds the nucleus.
B)a proton cloud surrouds the nucleus.
C)electrons travel in a definite path around the nucleus.
D)the exact path of a moving electron can be predicted.
Which of the following statements best describes the journey westward in the mid-1800s?
It was extremely slowgoing, but the trails were easy to cross.
It took a long time and included a number of difficult obstacles.
It took a short time but included a multitude of challenges.
The obstacles were so difficult that few pioneers made the effort.
The correct answer is option B
The statement that describes the journey westward in the mid-1800's is - It took a long time and included a number of difficult obstacles.
The people or travelers experienced several obstacles like- they included rivers to cross, they had vast mountain ranges, it possessed wild animals, there was threat of various diseases and had lack of basic resources. And eventually these hurdles made the traveling time taking.
What was the work of Rudolf Virchow trying to prove?
A. All cells came from preexisting cells.
B. Bacteria were unicellular organisms.
C. The theory of spontaneous generation could be supported.
D. Plants had different cells than animals.
Answer:
A. All cells came from preexisting cells.
Explanation:
Rudolf Virchow is one of the scientists being credited for postulating the cell theory. He specially worked on the third component of the theory which said that all cells come from preexisting cells. Previously it was believed that new cells formed from a fluid substance called as blastema. Blastema imbalance lead to various kind of diseases. Many scientists disproved this theory of spontaneous generation by showing that under sterile conditions new cells can not be formed until and unless a parent cell is already present. But it was Virchow's work which got largely recognized.
the correct (answer)
is. (A.) All cells come from preexisting cells.
...hope this helps
which best describes an effect of habitat fragmentation
The Edwards brothers rebelled against Mexico because
A.
Mexican officials permitted other people to live on their land.
B.
Mexican troops forbade them to settle on their land.
C.
Mexican settlers did not recognize their land rights.
D.
Mexican officials permitted slavery on their land.
The correct answer is option (C). The Edwards brothers rebelled against Mexico because mexican settlers did not recognize their land rights.
The Edwards brothers, along with other settlers in Texas, rebelled against Mexico due to a variety of reasons, one of which was the lack of recognition of their land rights by Mexican settlers. This was a significant issue because it undermined the settlers' ability to maintain control over their property and livelihoods.
Option A is incorrect because Mexican officials permitted other people to live on their land, but this was not the primary reason for the rebellion. Option B is incorrect because Mexican troops did not forbid them to settle on their land; in fact, the Mexican government had initially encouraged American settlement in Texas.
Option D is also incorrect because Mexican officials did not permit slavery on their land; on the contrary, Mexico had abolished slavery, which was another point of contention for some of the settlers who wanted to continue the practice.
If a pathogen on food got past saliva, which additional defenses in the first line of defense would the pathogen contact?
A stomach acid and lymphocytes
B lymphocytes and phagocytes
C phagocytes and mucus
D mucus and stomach acid
Ans. (D). mucus and stomach acid.
The first line of defense can be defined as the defense system that inhibits the entry of disease-causing pathogens or their components. It includes tears, skin, mucus, stomach acid, good bacteria, cilia, and neutrophils.
Pathogens present in food substances killed by antimicrobial substances present in saliva, mucus produced by epithelial lining of gastrointestinal tract, and stomach acid or hydrochloric acid. So, if a pathogen present in food got past saliva, it would be targeted by mucus and stomach acid.
Thus, the correct answer is option (D).
The first line of defence can be defined as the defence system that inhibits the entry of disease-causing pathogens or their members. It has tears, skin, mucus, stomach acid, good bacteria, cilia, and lymphocytes.
What is the first and second line of defense?The first line of protection is defined by the people on the front lines. They're driving risk, complying with regulations and standards, and taking out the company's defined risk management processes daily.
The second line of defence is executive and is liable for oversight of the doers.
Thus, option "A" is correct, stomach acid and lymphocytes.
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No matter what food you eat, you can always trace the source of energy back to what
What is a potential impact of replication errors on the cell cycle
Answer:
underreplication or overeplication of the genome and can produce a large array of human genetic diseases, including cancer, birth defects, and many developmental abnormalities
Explanation:
What is the main function of a fungus's hyphae
Fungal hyphae's primary function is to absorb nutrients through a high surface area-to-volume ratio and the release of enzymes that break down complex molecules into absorbable forms.
The main function of a fungus's hyphae is the absorption of nutrients from the environment. These thread-like structures maximize the fungus's surface area compared to its volume, enhancing its ability to absorb nutrients efficiently. The high surface area-to-volume ratios of hyphae allow for maximum exposure to the nutrient source, and the secretion of hydrolytic enzymes like cellulase aids in breaking down complex organic molecules into simpler forms that the fungi can absorb. These enzymes dismantle components such as the polysaccharide cellulose found in plant cell walls. Some fungi also develop specialized structures for absorbing nutrients directly from living hosts, but the overarching role of hyphae is to facilitate nutrient uptake.
What is a eukaryote, and when did eukaryotes first arise?
Eukaryote are cells with a nucleus an internal membrane-bound organelles probably evolved about 2 billion years ago.
What is the origin of eukaryotes?The leading hypothesis, called the endosymbiotic theory, is that eukaryotes arose as a result of a fusion of Archaean cells with bacteria, where an ancient Archaean engulfed (but did not eat) an ancient, aerobic bacterial cell.
What is meant by eukaryotic cell?Eukaryotes are organisms whose cells contain a nucleus and other membrane-bound organelles.
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Why is the ability to swim an inherited trait in a fish but a learned trait in a human being
An oil mining company has started drilling oil in a location. The mine has benefitted the people by providing them employment and infrastructure. The farmers in the location have reported that the quality of their crops has deteriorated after the setting up of the mine. Which of these conclusions is most likely correct about the oil mine? It causes drying up of water in plants.
It emits radiations which destroy plants.
It produces greenhouse gases which pollute soil.
It contaminates the soil and water in the location.
Answer:
Your answer is D. It will contaminate the soil and water in the ocean.
Explanation:
The oil drill is in the ocean, so it cannot be A since all of the plants are underwater. Oil is not radioactive so it cannot be B either. Greenhouse gases cannot pollute soil and only cause air pollution, so it cannot be C. D is the only reasonable choice since the oil is being mined directly from the ocean floor and may contaminate the surrounding soil and water.
What measures the amount of displacement in a longitudinal wave?
A scientist discovers a cell that has chloroplasts, cytoplasm, DNA, and a cell membrane. Which statement best describes how the cell could be classified?
Presence of a double membraned organelle (chloroplast) confirms that this is a eukaryotic cell, probably a plant cell. In contrast, prokaryotic cells do not have double membrane bounded organelles whereas both prokaryotic and eukaryotic cells have cytoplasm, DNA and membrane.
The best fit statement would be that the cell is eukaryotic as it comprises of chloroplasts.
Further Explanation:
Chloroplasts are a kind of plant cell organelles. These are essential for carrying out photosynthesis. It captures the sunlight, transforms it, and stores it in the energy storage molecules NADPH and ATP while releasing water and oxygen in the plants and algal cells.
Eukaryotic cells are those cells which comprise of organized organelles as well as nucleus which is wrapped by nuclear membrane. For instance, plants, animals, fungi, and protists. The genetic material of such organisms is arranged in chromosomes. Such cells comprise of many structures which perform different functions in the cell. For instance, ribosomes are responsible for making the proteins, mitochondria is known to produce energy molecules in the form of ATP, and endoplasmic reticulum aims in sorting and packaging the proteins. All the organelles are floating in the cytoplasm.
A prokaryotic cell, on the other hand, is a single celled and simple organism that lacks a nucleus or any other membrane-bound organelles. DNA or deoxyribonucleic acid is known to be a central segment of the cell or a darkened area which is called as nucleoid. All the cells share four main common elements:
1. Plasma membrane
2. Cytoplasm
3. DNA
4. Ribosomes
In the provided case, chloroplast is present and this confirms that the cell is a eukaryotic cell.
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2. Learn more about the proteins synthesis in a cell https://brainly.com/question/1420458
3. Learn more about exchange of gases by blood cells https://brainly.com/question/1213217
Answer Details:
Grade: High school
Subject: Biology
Chapter: Plants
Keywords:
Prokaryotic cells, eukaryotic cells, chloroplasts, DNA, cytoplasm, mitochondria, plasma membrane, endoplasmic reticulum, ribosomes, nucleoid.
Help please will give brainliest!
if a cell has 46 chromosomes, how many will it have after meiosis?
Final answer:
After meiosis, a cell that originally has 46 chromosomes will have 23 chromosomes. Meiosis reduces the chromosome number by half, resulting in haploid gametes with immense genetic variability due to independent assortment and crossover.
Explanation:
If a cell has 46 chromosomes, it would have 23 chromosomes after completing meiosis. Meiosis is a special type of cell division that reduces the chromosome number by half to produce gametes for sexual reproduction. After meiosis, each of the resulting four haploid cells contains half the DNA of the parent cell. Humans have 23 pairs of chromosomes, totaling 46 in a diploid cell. During meiosis, these pairs are separated, and thus each gamete ends up with 23 individual chromosomes.
Furthermore, this meiotic process contributes to genetic diversity through mechanisms like independent assortment and crossover. There are over eight million possibilities in chromosome alignment due to independent assortment alone (223 combinations), not including the variability created by crossover events. This ensures that each gamete, while having 23 chromosomes, is genetically unique.
Notably, somatic cells, which make up most of the body tissues and organs, typically have 46 chromosomes and are diploid, while gametes, being the reproductive cells, have 23 chromosomes and are haploid.
After meiosis, a cell will have 23 chromosomes.
Meiosis is a specialized cell division process that occurs in sexually reproducing organisms, reducing the chromosome number by half. In the context of a human cell with an initial count of 46 chromosomes, meiosis involves two sequential divisions: meiosis I and meiosis II. In meiosis I, homologous chromosomes separate, resulting in two daughter cells, each with 23 chromosomes.
These cells then undergo meiosis II, which resembles mitosis but involves haploid cells. Ultimately, four haploid cells are produced, each containing 23 chromosomes, representing half of the original chromosome number. This reduction in chromosome count is crucial for sexual reproduction, ensuring that when gametes (sperm and egg cells) fuse during fertilization, the resulting zygote restores the diploid chromosome number characteristic of the species.
Which of these is not a basic need of all organisms?
A.Food
B.Soil
C.Water
D.Appropriate environment
what would happen to this food chain if a disturbance caused a serious decline in the shark population?
What organelle in muscle cells was affected most during exercise?
What Organism is most likely 50 meters in size
.Lizard
.Bacteria
.tree
.ant
Chemical weathering occurs more rapidly in what kind of climates? A. Warm with abundant rainfall B. Cold with high snowfall amounts C. Desertlike D. Cool and dry
Acid + base yields salt + water is an example of a(n):
-synthesis reaction
-exchange reaction
-decomposition reaction
-reversible reaction
the process of cellular respiration
Answer:
Cellular respiration:
Cellular respiration may be defined as the process of the metabolic reactions occurs in the cell of the organism that convert the energy in the form of ATP (adenosine triphosphate). The catabolic respiration reaction breaks the large molecules into simpler substances and energy is released in the form of ATP.
The heat is released in case of cellular respiration and considered as exothermic reaction. The substance get oxidize and reduce in sequential steps in case of the cellular respiration. Cellular respiration can occur in the presence of oxygen as well as in the absence of oxygen. Glycolysis, citric acid cycle and electron transport chain is included in cellular respiration.
Part 1: Which substance has a higher solubility? Part 2: Explain your answer for Part 1.
Julia did an experiment to study the solubility of two substances. She poured 100 mL of water at 20 °C into each of two beakers labeled A and B. She put 50 g of Substance A in the beaker labeled A and 50 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.
Experimental Observations
Substance
Mass of Undissolved Substance at Different Temperatures (gram)
20 °C 40 °C 60 °C 80 °C
A 40 37 34 30
B 15 14 13 12
PLEASE ANSWER NO ONE IS ANSWERING AND I NEED HELP ILL GIVE YOU ALL MY POINTS
the way to get this answer would be to find the answer that has less undissolved mass because you have to find the one with higher solubility, which also means the one that can dissolve the most mass.
Solubility is the solute's ability to get dissolved in the solvent to form the saturated solution. The solubility of substance B in beaker B is more as compared to substance A.
What is solubility?
The capacity of the solute to form a solution with a solvent is defined by solubility. The solubility depends on many factors like pressure, mass, reactivity, temperature, etc.
The solubility is directly proportional to the temperature and increases with a rise in temperature. The mass of substance A is higher than that of substance B at all the temperatures and hence its size may be large.
Therefore, the mass of substance B is dissolved more at all temperatures as compared to substance A.
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Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist
The right answer is C. Oxygen
During photosynthesis, there is consumption of carbon dioxide and water to produce glucose and dioxygen. Glucose is the "fuel" of its growth. Cellular respiration will consume some of this glucose and oxygen to form oxygen and water.
So, if the atmosphere was lacking oxygen, it's simply because there was no photosynthesis producing oxygen.
Which molecule is involved in the immune system?
Answer:
The proof that in any synthesis reaction, a chemical change has occurred is that in a synthesis reaction, two reactants combine to form a new compound.
Explanation:
A molecule whose ends have opposite electric charges is called a _____ molecule.
magnetic
diatomic
neutral
polar
What connection do all living things have with eachother
All living things share a common connection as they are part of the tree of life or the web of life on Earth. This connection is based on the concept of biological evolution, which explains that all living organisms on our planet have evolved from a common ancestor over billions of years.
All living things, from simple bacteria to complex multicellular organisms, are united by their shared genetic material, the fundamental biochemistry of life, and the presence of cells as the basic structural and functional units. They also exhibit characteristics such as growth, reproduction, adaptation, and response to stimuli.
Additionally, living organisms interact and depend on each other within ecosystems. They form intricate relationships as producers, consumers, and decomposers, participating in nutrient cycles and energy flow. Organisms often rely on each other for resources, such as food, shelter, and symbiotic relationships.
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