Answer:B
Explanation:The scientist changed the variable
which best explains mantle convection
Answer:
não sei responder sua pergunta
Explain the importance of feedback inhinbition to the cell
Answer:
Feedback inhibition is also necessary to prevent enzymes from breaking down too many molecules that are energy sources for the cell, such as glucose. Inhibition takes place in glycolysis, the process of breaking down the sugar glucose to produce the cell's "energy currency" molecule ATP.
In what bodies does chlorophyll exist in plants?
Answer:
Stems
Explanation:
what is the maxium temperature reached when you combine 25 grams of zinc with hydrochloric acid?
Answer:
The approximate value for the maximum temperature reached during this reaction will be 87.1 °C (option E).
Explanation:
Zinc is a reactive metal so it will strongly react with the hydrochloric acid, which also is a strong acid and so it is highly reactive too. This will result in an exothermic reaction (one where heat is given off to the surrounding).
The products of this reaction will be hydrogen gas and aqueous zinc chloride (replacement reaction).
The trade-off that occurs when the stomata are open is best described as:________A. when the stomata are open, oxygen can get in but CO2 can get out.B. when the stomata are open, oxygen can get out but CO2 can get in.C. when the stomata are open, oxygen can get out but water can get in.D. when the stomata are open, CO2 can get in but water can get out
Answer:
Explanation:
:
D. when the stomata are open, CO2 can get in but water can get out
Explanation:
Stomata are openings in leaf epidermis that are small they permit the entry of carbon dioxide and also allow the exit of water vapour.
Opening and closing of stomata is regulated according to physiological needs of the leaf.
Carbondioxide that is diffuses into the leave is used for photosynthesis.
Plant regulates water loss from the stomata. during the hot and cold weather water is conserves to maintain a cool environment in plant this is done by closing of stomata.
The correctly sequenced sections of the small intestine are: ____________, _____________, ____________.
Answer:
The correct answer is: duodenum, jejunum, ileum.
Explanation:
The small intestine is the part of the digestive tube that is mostly responsible for the absorption of nutrients that we incorporate through our diet, although part of the digestion also occurs in this segment (specifically in the duodenum).
The first segment, the duodenum, is the shortest of the three (about 25 centimeters in length) and is the one that is connected to the stomach. The duodenum receives the bile (from the liver), the pancreatic juice (from the pancreas), and the gastric chyme (from the stomach), to digest proteins and fat.
The second segment, called the jejunum, is about 2,5 meters long and its main task is to absorb the products of digestion, such as amino acids, carbohydrates, and fatty acids. This is how the nutrients reach our bloodstream and then the tissues where they are needed.
The last segment, the ileum, is the longest (about 3 meters long) and it's responsible for the absorption of vitamin B12 and bile acids. The ileum then connects to the large intestine, where water will be absorbed.
Dr. Foster was studying the effects of zinc on the common cold. She hypothesized that zinc would shorten the duration of the common cold. She conducted a study in which patients suffering from a cold were given daily doses of either zinc or a placebo and the amount of time it took for them to feel better was measured. whats the independent variable: whats the dependent variable: whats the constant variable: whats the control group: whats the experimental group:
Answer:
Independent variable: Zinc doses Dependent variable: The duration of the cold. Control group: patients who received the placebo. Experimental group: Patients who received the dose of zinc.Explanation:
The independent variable is one that does not need to be influenced by anything to be measured. In addition, this variable influences the result of the experiment. In the above experiment, we can see that Dr. Foster is analyzing the influence of zinc doses on the duration of colds, with that we can conclude that the zinc doses (which influence a result) are the independent variables.
The dependent variable is one that needs an influence to be measured. This influence is the independent variable, which influences a result within the dependent variable. As we can see in the above experiment, the duration of the cold is influenced by the zinc dozen, therefore, the duration of the cold is the dependent variable.
The experimental group is the group that receives the element that is being tested in the experiment. The experiment is testing zinc doses, so the group of patients who received the zinc doses is the experimental group.
The control group is the group that did not receive the element that is being tested in the experiment. The group that did not receive the zinc doses is the control group.
Why is it almost impossible to commit a crime without leaving behind evidence?
Answer: most of the time, fear and panic
Explanation:
techniques to find the culprit in a crime have improved,
yes its almost impossible to not commit a crime without leaving evidence, the people (police,etc) can use techniques to find your fingerprint, witnesses, footprint, and many other substances that belongs to the culprit. Witnesses can be a big help too. So yes its 'almost' impossible
The cell responsible for secreting the matrix of cartilage is the:_______.
Answer:
Osteoblast
Explanation:
It is Osteoblast because Osteoblast is a cell tgat come from the bone marrow and for new bones called osteoid and have only one nucleus, it produce and secrete the organic components and inorganic components of bone or cartilage extracellular matrix. It produce new bones which is made from collagen and some proteins.
8. On page 8 of your textbook the authors describe an experiment in which the amount of butter is
changed between two cookie recipes. Imagine a scenario in which a person also changes the type
of flour used (whole wheat flour versus regular bleached flour). Is this still an effective
controlled experiment? Briefly explain your answer either way.
If you were to climb to the top of Mt. Everest (~9km above sea level), how many breaths of air would you need to take at that altitude to get the same amount of air in your lungs as you could when breathing at sea level?a. 3 b. 5 c. 7 d. 15
Answer:
The correct answer would be option a. 3
Explanation:
When lung exposed to a high altitude like Mt. Everest, it shows elevated heart rate, faster breathing due to hyperventilation so it could get enough oxygen supply to its tissues.
The oxygen level at sea level are three time more than the oxygen level at Mt. Everest as oxygen level is 30 to 33 percent of the seal level.
Thus, the correct answer is : option a. 3.
If an enzyme is placed in a lower than optimal pH, its loss of activity might be due to
Answer:
denaturing of the peptide bonds
Explanation:
Enzymes are proteins that help speed up chemical reactions. However, they require specific temperatures and pH's to work optimally and produce the best outcome.
If an enzyme is placed in a lower than optimal pH, that means that there are more H+ ions, and the environment is more acidic. This influx of H+ ions can denature the peptide bonds within the enzyme, causing it to fold in a different way and be unable to carry out its normal duties. Hence, the activity of the enzyme will decrease significantly.
~ an aesthetics lover
I NEED D GIVE ME DDD
Answer:
?????????????????????
Explanation:
why u do dat
Do sunflowers grow better in fields or individually?
HELLLLLLLLLLLLLLLLLLLLLLLLLLP PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPLLLLLLSSSSSSSSSS Heat and pressure can change limestone into marble. Marble is a(n): igneous rock metamorphic rock sedimentary rock conglomerate rock
Answer:
Metamorphic rock
Explanation:
metamorphic rock formed when limestone is exposed to high temperatures and pressures. Marble forms under this condition because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals.
In a cross between a white‑eyed female with two X chromosomes and one Y chromosome (XwXwY) with a red‑eyed male, the majority of the males have white eyes and the majority of the females have red eyes. However, rare red‑eyed males and white‑eyed females are present as well. What is the most likely chromosomal constitution of the red‑eyed males and white‑eyed females resulting from this cross? X+XwY females and Xw males X+Y males and XwXw females XwY males and XwX+ females X+Y males and XwXwY females X+XwY males and Xw females
Answer:
The correct answer is - =X+Y males and XwXwY females
Explanation:
during meiosis, XXY females are prone particularly to X chromosome during meiosis. This nondisjunction can lead to the production of both X+Y red-eye male and XwXwY white eye females.
The red-eye male has resulted from the fertilization of X bearing sperm and Y bearing egg. The XwXwY is formed from Y bearing sperm and an egg with two chromosome fertilization.
PLEASE HELP FAST I WILL GIVE YOU A LOT OF POINTS Advancements in _________ help us change the way we think about existing scientific knowledge - technology - logic PLEASE HELP FAST ILL DO ANYTHINGGGGG
Advancements in technology help us change the way we think about existing scientific knowledge.
What is Technology?Technology, also referred to as the transformation and manipulation of the human environment, is the application of scientific knowledge to the practical goals of human life.
A number of articles cover the topic of technology. See history of technology; hand tool for general treatment.
History of agriculture, agricultural economics, beekeeping, beer, cereal farming, coffee, commercial fishing, dairy farming, distilled spirits, food preservation, animal husbandry, poultry farming, and soft drink manufacture for treatment of the production of food.
Therefore, Advancements in technology help us change the way we think about existing scientific knowledge.
To learn more about technology, refer to the link:
https://brainly.com/question/9171028
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A sugarcane plant with yellow pollen and wavy leaves is crossed with a plant with yellow pollen and smooth leaves. Seed are collected and germinated. The following results are obtained in the progeny:
153 yellow pollen, wavy leaves
145 yellow pollen, smooth leaves
48 white pollen, wavy leaves
51 white pollen, smooth leaves
a. For each locus (trait): Assign appropriate symbols for the alleles of the genes, indicate the dominance interaction between the two alleles, and give all possible genotypes and their associated phenotypes
b. Give the genotypes of the parents of this cross.
c. Give the expected genotypic and phenotypic ratios of the progeny of this cross.
Answer:
a.
i) Y and y represent Yellow and white alleles for the pollen color gene; where Y (yellow) is dominant over y (white).
ii) W and w represent wavy and smooth alleles respectively for the leaf texture gene. W (wavy) is dominant over w (smooth).
YYWW, YyWW, YyWw, YYWw- yellow, wavy phenotype
YYww, Yyww- yellow, smooth phenotype
yyWW, yyWw- white, wavy phenotype
yyww- white, smooth phenotype
b) yellow pollen and wavy leaves (YyWw) × yellow pollen and smooth leaves (Yyww)
c) Expected genotypic and phenotypic ratio of progeny: 3:3:1:1
Explanation:
This question involves two distinct genes; one coding for pollen color and the other for leaf texture. Let Y and y represent Yellow and white alleles respectively for the pollen color gene; where Y (yellow) is dominant over y (white) while W and w represent wavy and smooth alleles respectively for the leaf texture gene; W allele (wavy) is dominant over w allele (smooth).
Next, we convert the progeny number to phenotypic ratio by dividing each number by the smallest number (48)
yellow pollen, wavy leaves= 153/48 =3.18
yellow pollen, smooth leaves= 145/48= 3.02
white pollen, wavy leaves= 48/48= 1
white pollen, smooth leaves= 51/48= 1.06
Approximately, the phenotypic ratio of the progeny is 3:3:1:1
According to the question, a parent with with yellow pollen and wavy leaves will have genotype YyWw because white pollen (w) and smooth leaf (s) was produced in the progeny. Also, the other parent with yellow pollen and smooth leaves will have genotype: Yyww. In a cross between these two parents i.e. YyWw × Yyww, the following gametes will be produced:
YyWw- YW, Yw, yW, yw
Yyww- Yw, Yw, yw, yw
Using these gametes in a punnet square (see attachment), the following 16 offsprings will be produced in a ratio 3:3:1:1
yellow pollen, wavy leaves (Y_W_) 6
yellow pollen, smooth leaves (Y_ww) 6
white pollen, wavy leaves (yyW_) 2
white pollen, smooth leaves (yyww) 2
What is the most likely cause of a disorder if both monozygotic and dizygotic twins show a high concordance rate?
Answer:
The options are
A. Recessive genes
B. Dominant genes
C. Different environmental experiences
D. Shared environmental experiences
The answer is D. Shared environmental experiences
Explanation:
The most likely cause of a disorder if both monozygotic and dizygotic twins show a high concordance rate is shared environmental experiences.
This is because twins usually have a very high degree of concordance rate i.e they have similar genetic traits and characteristics as a result of factors such as Recessive and Dominant genes. The disorder or abnormality which would support this is them having shared environmental experiences which will make them have it in common unlike different environmental experiences which will aid variation.
1.
Chose the best answer
2 Pts
1. If a pea plant has a recessive allele for green peas, it will produce
A
B
A green peas if it also has a dominant allele for yellow peas.
B. both green peas and yellow peas if it also has a dominant allele for yellow peas.
C. green peas if it does not also have a dominant allele for yellow peas.
D. yellow peas if it does not also have a dominant allele for green peas.
Answer:
The anwser is B
How many animals carry rabies?
What has the study of fossils allowed scientists to do?
A. Describe past environments and the history of life.
B. Study present ocean temperatures at different depths.
C. Analyze the chemical compositions of sedimentary rocks and minerals.
D. Predict which organisms will become extinct in the future
Answer:
A.
Explanation:
I THINK it is A, because fossils are decomposed animal remains, right? So what I'm saying is that the answer is A, because the structure of the fossil could help tell how the creature (or plant) adapted in order to survive in its surroundings.
What is the origin of the energy that animals acquire by eating plants or other animals?A. Carbohydrates.B. Fats.C. Heat.D. Sugars.E. Sunlight.
Answer:
the correct answer✅✔☑ is
E. Sunlight☀
Birds cause a lot of damage to airplanes every year to study this problem the US Air Force infinity chicken canon Air Force scientist use the Canon shoot chicken bodies airplanes and control test then analyze the damage the chicken bodies cost evaluate this model in what way do you think it is helpful what are some of the limitations
Answer:
the what hey o
Explanation:
yes
Which of the following was NOT a change in the ecosystem as a result of the wolves killing coyotes?
The beaver population increased
The rabbit population increased
The weasel
The mice
The snake
Answer:
The beaver population increased
I need help ............
Saturated Fats:
bad fats
solid at room temp
butter, red meat
Single bonds
Unsaturated Fats:
good fats
double bonds
oils and nuts
liquid at room temp
Which of the following is a limit of science?
limit of science define problem with observation, and thus are limit of human ability to inquire and answer questions about phenomenal
I hope this was helpful
How the corona virus pandemic impact Indian agriculture
Answer:
Caterpillars are in a semi-hibernation phase
Explanation:
During winter caterpillars dehydrate themselves and generate a cryoprotectant that flows in their circulatory system (i.e., hemolymph) to avoid water freezing, thus preventing tissue damage. For example, Pyrrharctia Isabella (Lepidoptera, Erebidae), a caterpillar common in North America, can survive 1 week at −20°C. This condition is known as 'semi-hibernation' and it ends when the first temperate days arrive.
Which of the following polypeptides is most likely to form an α-helix explain your answer.(a) CRAGNRKIVLETY (b) SEDNFGAPKSILW (c) QKASVEMAVRNSG
Answer:
(c) QKASVEMAVRNSG
Explanation:
The alpha helix is a protein arrangement tightly packed, thereby the peptide will form a rod. The option (c) is expected to form an alpha helix because it contains three amino acids charged which are aligned on the face of the helix, 1-two residues positively charged: Lysine (K) and Arginine (R), and 2-one residue negatively charged: Glutamic Acid (E).
The following polypeptides are most likely to form an α-helix explain your answer - (c) QKASVEMAVRNSG
Destabilization of α-helicesThe formation of alpha-helix required correct steric configuration. Amino acids with R-groups are too large like tryptophan, and tyrosine or too small glycine destabilize α-helices.
Proline also destabilizes α-helices has irregular geometry and causes steric hindrance because its R-group bonds back to the nitrogen of the amide group.
Option(A) CRAGNRKIVLETY
There is Glycine in this sequence, so it can not form an alpha helix.
Option (B): SEDNFGAPKSILW
The presence of glycine and proline causes not to form an alpha helix.
Option (C): QKSVEMAVRNSG
Glycine is present but still, it is most likely to form an alpha helix as glycine is the end of the sequence.
Find more information about a-helices:
https://brainly.com/question/319376
How could you tell if the powder was salt sugar flour or baking soda
Answer:
Through chemical reactions.
Explanation:
You tell if an unknown powder is salt, sugar, flour or baking soda by doing tests to see how the powder would react. For an example, baking soda in vinegar would cause it to fizzle, while flour would just make the vinegar murky and cloudy. With salt and sugar, you can test if it dissolves and if it does it is sugar. If not, it is salt.