Answer:
Photosynthesis doesn't occur at night. When there is no photosynthesis, there is a net release of carbon dioxide and a net uptake of oxygen. ... the rate of photosynthesis is higher than the rate of respiration. there is a net release of oxygen and a net uptake of carbon dioxide.
how does the skeletal system help the body maintain homeostasis? if it doesn't function correctly how does it affect the body?
Answer:
Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain internal stability and balance, otherwise known as homeostasis. Disease in one body system can disrupt homeostasis and cause trouble in other body systems.
Explanation:
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Describe the change in shape of the lens when a person looks from a near object to a distant object
Answer:
Accommodation is the process of changing the shape of the lens to focus on near or distant objects.
To focus on a near object – the lens becomes thicker, this allows the light rays to refract (bend) more strongly.
To focus on a distant object – the lens is pulled thin, this allows the light rays to refract slightly.
Color blindness is a recessive sex-linked human trait. If a color-blind father and a mother with normal color vision have a color-blind son, what must be the mother's genotype?
A. XNXn
B. XNXN
C. XnYn
D. XNY
Answer:
A. XNXn
Explanation:
looks like it's a 50% chance of color blindness
The transcription of genes in E. coli that lack a termination sequence require _______ factor to terminate transcription.
Answer:
rho
Explanation:
The Rho factor is a prokaryotic helicase protein that acts in bacteria to mediate the process of termination of transcription. In Escherichia coli, the Rho factor is a hexameric ring-shaped helicase and each subunit of this factor contains two domains involved in RNA binding and ATP hydrolysis. The Rho factor binds to the transcription terminator site on single-stranded RNA and then continues along the messenger RNA (mRNA) strand until it reaches the RNA polymerase, subsequently triggering its dissociation from the DNA and thus the termination of transcription.
6CO2 + 6H2O → C6H12O6 +602
In this chemical reaction H2O is a...
A. reactant.
B. product,
C. photosynthesis.
Answer:
water is a reactant because it reacts with carbon dioxide to form the products above
The BRCA-1 genes in humans encode proteins that have role in maintaining DNA stability. Mutation in this gene results in formation of non-functional protein, which is not able to repair damaged DNA, resulting in a significantly increased risk of breast cancer. BRCA-1 is a/an: Group of answer choices Proto-oncogene Homeotic gene Oncogene Tumor suppressor gene
Answer:
tumor suppressor gene
Explanation:
A tumor suppressor gene is capable of modulating cellular processes during cell division and/or replication, thereby avoiding uncontrolled cell proliferation and tumor development. For example, the p53 gene is a tumor suppressor gene that encodes a protein (p53) which is well known to regulate critical cellular processes such as, for example, cell cycle arrest and programmed cell death (apoptosis). Moreover, breast cancer genes BRCA1 and BRCA2 are tumor suppressor genes that regulate the repair of damaged DNA through the Homologous recombination (HR) pathway. In consequence, mutations in BRCA1 and BRCA2 genes can increase the risk of developing breast cancer.
please answer this
Answer:
11. T
12. F
13. F
14. F
15. T
the most common mineral group is broken into the subgroups of ferromagnesium and non ferromagnesium
Answer: The answer would be Silicate
Explanation: They are made out of silicon and oxygen
arrange these structures in order of size, beginning with the smallest
stomach
mitochondrion
starch grain
tracheal cell
nucleus
Answer:
1.starch grain (smallest)
2.nucleus
3.mitochondria
4.tracheal cell
5.stomach (largest)
What are fats primarily broken down and converted into so that energy stored within these molecules can be harvested
Answer:
i think its Acetyl-CoA
Explanation:
Place the tiles in order so that they describe a population undergoing natural selection
Not all tiles will be used
Answer:
A new species of hawk that preys on rabbits is introduced to the habitatThe hawks have more success in catching rabbits with white fur because they are easier to see in the habitatThe rabbits´ white fur mutate so their fur is tan or brownThe next generation of rabbits has a higher proportion of individuals with tan and brown fur.Explanation:
Natural selection is an evolutive force that can act favoring an allele or against it, according to how it affects the fitness of individuals. Natural selection selects beneficial alleles and increases their frequency in the population.
When many organisms in a population sharing the same trait die, it is because they did not have good fitness, so they were not adapted to the environment and its pressures. The alleles coding for that trait were not good for the fitness of the animals, so they do not get to survive.
These individuals die before reproducing, so they could not transfer their genetic charge to the following generation. Eventually, the alleles coding for the trait will decrease in the population, probably near zero. Natural selection is acting against this phenotype. Other alleles will be beneficiated, and their frequency in the population will increase.
This change in alleles frequency is what we call adaptation.
Natural selection results in adaptation, which means the increase of the aptitude phenotype. Aptitude is the contribution of each genotype to the next generation.
In many cases, adaptations can be correlated to environmental factors or selective pressures applied by other organisms or habitats.
Let us remember that a mutation is a change or alteration in DNI sequences that introduce new variants. Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.
So, in the exposed example, we are focussing on rabbits populations.
• The selective pressure or modeling environmental factor is predation by the introduced hawk.
• The rabbits´ response to predation is the survival of only those that carry mutations ⇒ tan or brown fur
• Natural selection benefits these mutations.
• Tan or brown rabbits survive and increase their fitness.
_______
are responsible for the structures and
functions of organisms.
DONE
Large biomolecules and macromolecules known as proteins are made up of one or more extended chains of amino acid residues. Proteins are responsible for the structures and functions of organisms.
What is Protein?Large, intricate molecules classified as proteins perform an array of essential roles in the human body. They are fundamental for the structure, operation, and control of the body's tissues and organs and perform out the majority of their work inside cells.
Many thousands of amino acids, which seem to be smaller components that make up proteins, are linked together in lengthy chains to form proteins. To form a protein, 20 different kinds of amino acids can be mixed. Each protein's precise function and characteristic 3-dimensional structure are established by its amino acid sequence.
Thus, Proteins are responsible for the structures and functions of organisms.
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Forms of inheritance that do not follow typical Mendelian patterns and that appear to be more influenced by the parent contributing the most cytoplasm to the embryo are grouped under the general heading of ________.
Answer:
Extrachromosomal or cytoplasmic inheritance
Explanation:
Extrachromosomal or cytoplasmic inheritance refers to hereditability transmission controlled by cytoplasmic genes.
This form of inheritance lays in genes that are out of the nucleus. Information for some characters is placed in organelles in the cytoplasm, such as mitochondria and chloroplasts. These organelles have a well-defined portion of the total cellular genome.
Although mitochondrial inheritance is mostly maternal, recent studies have demonstrated that it might also be paternal.
Sperm cells hardly carry mitochondria, so mitochondrial DNI is mostly inherited from the maternal side. If there exists any mutation in this DNI, the whole progeny of the mutated woman will be affected, as they will get the mother´s mitochondria carrying the mutation. On the contrary, if there is a man affected by a disease caused by a mutation in mitochondrial DNI, non of their descendants will get the disease.
Question 5
20 pts
If enzymes could not be used during a reaction, which of the
following could be added to a system to make the reaction occur?
O energy (possibly heat)
water
0 product
O substrate
Answer:
substrate is wright
hope it may help you
Which best defines matter?
A. All the living things on the planet
B. All solid objects that can be seen
C. Anything in the atmosphere
OD. Anything that takes up space and has mass
SUBM
Answer:
Anything that takes up space and mass
Explanation:
In science matter takes up space either by a solid, liquid, gas, plasma etc. And it all has mass no matter how small or how much it has.
list few points on the importance of sun in power supply.
Answer:
The sun provides more than enough energy to meet the whole world's energy needs, and unlike fossil fuels, it won't run out anytime soon. As a renewable energy source, the only limitation of solar power is our ability to turn it into electricity in an efficient and cost-effective way.
Answer:
Nothing is more important to us on Earth than the Sun. Without the Sun's heat and light, the Earth would be a lifeless ball of ice-coated rock. The Sun warms our seas, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth.
It takes about [?] hours for food to be
ingested, digested, and leave the small
intestine.
A. 8
B. 1-2
C. 24
D. 5.
Answer:
A 6 to 8 hours. After you eat it takes about 6 to 8 hours for food to pass through your stomach and small intestine.
Protein digestion begins in the ________; fat digestion begins in the ________. Stomach; small intestine Mouth; stomach Esophagus; stomach Small intestine; small intestine Small intestine; large intestine
Answer:
Protein digestion begins in the mouth
Fat digestion begins in the stomach
Once a protein supply reaches your stomach, hydrochloric acid and enzymes referred to as proteases spoil it down into smaller chains of amino acids. Amino acids are joined collectively through peptides, that are damaged through proteases.
Fat digestion starts offevolved withinside the stomach. Some of the byproducts of fats digestion may be immediately absorbed withinside the stomach. When the fats enters the small intestine, the gallbladder and pancreas secrete materials to in addition spoil down the fats.
What is digestion?The approaches of digestion encompass six activities: ingestion, propulsion, mechanical or bodily digestion, chemical digestion, absorption, and defecation. The first of those approaches, ingestion, refers back to the access of meals into the alimentary canal thru the mouth.
Thus it is well explained.
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Give one reason why structure f(petal) is brightly colored in the diagram?
Answer:
petals are colorful because the color attracts birds, bees and other insects. The insects land in the flower and spread pollen, which helps fertilize the flowers and create seeds. Some flowers change color as they grow older.
In a forest ecosystem, spotted owls make their homes in the cavities of dead trees. Thissame habitat is home to the rodents that the owls feed on. Human activities, such as logging,have caused the population of the spotted owl to decline. From this information, what statement BEST explains the relationship between humans and the spotted owl
Options are given in the comment section:
Answer:
The correct answer is - Humans have taken away resources needed by the owls, so there are fewer owls.
Explanation:
In this question, it is established that the trees are the habitat for the owls, and also these trees help in their food resources as these trees are habitat of rodents also.
By logging, humans destroy the habitat of both owls and rodents they feed on and important for their growth and survivability. Humans have caused the removal of required resources for the owls therefore, there are fewer owls.
comparison mitosis meiosis purpose ? ? number of parent cells ? ?
Explanation:
mitosis has 1 stage and meiosis had 2 stages.
Mitosis produces diploid cells (46 chromosomes) and produces 2 identical daughter cellsMeiosis produces happiness cells (23 chromosomes) and produces 4 genetically different daughter cellsAnswer:
Mitosis and meiosis are nuclear division processes that occur during cell division.
Mitosis involves the division of body cells, while meiosis involves the division of sex cells.
The division of a cell occurs once in mitosis but twice in meiosis.
Two daughter cells are produced after mitosis and cytoplasmic division, while four daughter cells are produced after meiosis.
Daughter cells resulting from mitosis are diploid (46 chromosomes), while those resulting from meiosis are haploid (23 chromosomes).
Daughter cells that are the product of mitosis are genetically identical. Daughter cells produced after meiosis are genetically diverse (genes swap during division).
Mitosis has 1 parent and meiosis produces 2 types of sex cells which fuse at fertilisation.
What is the rapid change in a membrane's potential caused by the depolarization of a neuron?
A.Action power
B.Movement potential
C.Action potential
D.Neuron power
Answer:c it’s the answer
Explanation:
C
what determines the rate of materials going into a cell and wastes leaving the cell?
Answer:
A
Explanation:
as the cell volume increases , its ability to exchange materiala across the cell surface increases
What is the name of the enzyme used in both cellular respiration and photosynthesis to stick a phosphate to ADP to make ATP
Answer:
ATP synthase
Explanation:
In both cellular respiration and photosynthesis, the enzyme ATP synthase is utilized to help make ATP.
The function of coenzyme A in the citric acid cycle is most like Group of answer choices a limousine driver dropping off a couple at the school prom. a kid jumping up and down on a trampoline. a frog that turns into a prince. throwing a baited hook into a lake and catching a fish.
Answer:
a limousine driver dropping off a couple at the school prom
Explanation:
The citric acid cycle, also known as the Krebs cycle, is a metabolic pathway by which carbohydrates, lipids and amino acids can be oxidized to carbon dioxide (CO2) and water (H2O). Coenzyme A (CoA) is a key coenzyme in the citric acid cycle. Coenzyme A acts as a carrier of acyl groups: its acetyl-coenzyme A form delivers the acetyl group to the citric acid cycle in order to be oxidized for energy production. During the citric acid cycle, Coenzyme A delivers the acetyl group to oxaloacetate (a four-carbon molecule), in order to form citrate (a six-carbon molecule that contains three carboxyl groups). Subsequently, citrate is oxidized and decarboxylated to produce a succinyl CoA, 2 CO2, and 2 NADH.
somebody help. . ways of propagation of plant materials for planting.
Answer:
These seven methods include: seed propagation, cutting, layering, division, grafting, budding, and tissue culture technique.
Explanation:
The major methods of asexual propagation are cuttings, layering, division, budding and grafting. Cuttings involve rooting a severed piece of the parent plant; layering involves rooting a part of the parent and then severing it; and budding and grafting is joining two plant parts from different varieties.
n
Which statement best describes the step in muscle contraction when the sarcomere is the shortest?
A The sarcomere is contracted, and the actin and myosin filaments are partially overlapped.
B The sarcomere is relaxed, and the actin and myosin filaments are partially overlapped.
C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.
D The sarcomere is relaxed, and the actin and myosin filaments are completely overlapped.
Answer:
C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.
Explanation:
In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament. Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.
In the sarcomere, which is the contractile unit of skeletal muscles, there are
Thick myosin myofilaments in the central region belonging to the A band. Thin filaments united to the Z lines, extending in the interior of the A band until they reach the border of the H band. Thin actin filaments composing the I band, which belong to two sarcomeres adjacent to a Z line.When the muscle contracts, the muscular fiber gets shorter and thicker due to the reduction in the length of the sarcomere. The H line and the I band get shorter. The Z lines get closer to the A band, meaning that they get closer to each other. A band keeps constant in length. This change is produced by movement mechanisms that involve a change in the relative position of actin and myosin filaments.
Answer:
C
Explanation:
edge 2021
If you had a type of cancer that involved the immune cells in your central nervous system that ingest intruders (similar to how macrophages function in the peripheral body), what cell would be affected?
Answer:
Phagocytes.
Explanation:
Phagocytes are the cells which would be affected by the cancer that involved the immune cells in our central nervous system that ingest intruders. If the cells that ingested intruders also turn into cancer cells then there is decrease occur in the number of Phagocytes and the body's immune system get weaken and unable to defend the body against pathogens. Phagocytes are a type of white blood cells that use phagocytosis method to engulf bacteria, foreign particles, and dying cells to protect the body.
Which type of seismic wave is recorded by a sesimoraged first during an earthquake ?
How many kingdoms are in the modern system of classification?
Answer:
There are 6 kingdoms
Explanation:
According to the modern classification there are six kingdoms a these include kingfom archaebacteria, eubacteria, protista, fungi, Monera, plantae and animalia