Answer:
See the answer below
Explanation:
First, it may seem that the question is with a typographical error. I guess you wanted to ask, "Which statement best describes the scientist who contributed to our current body of scientific knowledge?"
To answer the question, anyone that has engaged in research following the established scientific method and was able to report the findings from the research by publishing it in a recognized journal has contributed to our current body of scientific knowledge.
In this regard, men and women of all races, through time have contributed to our current body of scientific knowledge.
Many male birds will expend A great deal of energy building nests. Females will mate with the males who build the best nest. This is best described as an example of ___.
a) natural selection
b) sexual selection
c) runaway selection
d) an invasive species
e) disruptive selection
Answer:
B
Explanation:
Female birds mate with the males who build the best nest is the example of option b. sexual selection.
Sexual selection is a mode of natural selection in which one sex members choose the mate with the member of the other sex for mating.
These members of the biological sex prefer opposite sex members for species-specific characteristics in individuals of the other sex such as best building nest in birds. Other male birds compete with members of the same sex to get selected by members of the female birds in this instance.Thus, the correct answer is option b. sexual selection as female birds prefers species-specific traits to select their mating partner by best nest building by males.
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The proximal convoluted tubule is A. lined with epithelial cells that lack microvilli. B. the site of glucose and amino acid reabsorption. C. permeable to water if ADH is present. D. impermeable to water. E. the site of water secretion.
Answer:
The correct answer is - option B.
Explanation:
The proximal convoluted tubule or PCT is the the part of nephron that lies in between of loop of Henle and bowman's capsule. The PCT is responsible for the most amount reabsorption of sodium, glucose, amino acids, water, potassium and chloride and reabsorbs around 65% to 100% of filtered substance.
Epithelial cells in the PCT reabsorb substances that have nutritional importance by the numerous microvilli on their surface.
Thus, the correct answer is - option B.
Witch statement correctly compares the “analysis” and “conclusion” section of a lab report
Answer:
Analysis section of lab report comprises of making comparisons while Conclusion section is used to make further research about the experiment.
Explanation:
Analysis section of lab report comprises of making comparisons between specific data. After knowing the scope and objectives of the experiment, data is collected either by performing the experiment or adopted data from other organization such as hydrological data obtained from hydrological agency, analysis of such data comprises of making comparisons.
While
Conclusion section is used to make further research about the experiment. It is used to report the outcome of the result and also to determine other possibilities of results from the experiment.
Identify the error in the following statement: “Photosynthesis is a chemical
reaction that takes place in the chloroplasts of green plant cells, where chemical
energy is used to convert carbon dioxide and water into glucose and oxygen."
A. No errors
B. "water" and "oxygen" should be switched
C. "chemical" should be "light"
D. "chloroplasts" should be "mitochondria"
Answer:
It is 'C'
Explanation:
The chemical reaction that occurs in the chloroplast is:
6CO₂ + 6H₂O → C6H₁₂O₆ + 6O₂
The electromagnetic energy of sunlight is converted to chemical energy in the chlorophyll-containing cells of photosynthetic organisms. The granum stores the photon particles from light and converts its energy into chemical energy to convert carbon and water into glucose and oxygen.
Answer:
c
Explanation:
please answer the question
Answer:
two of the DNA fingerprint are same when they contain the same nitrogenous bases in the same location of the DNA.
Explanation:
The DNA fingerprint is one of the most important tool as a forensic medicine expert to to form such condition and rule it out to come to a diagnosis.
DNA fingerprint uses the base pair which a different for all the other human beings. Due to this from the blood or other cells of the body there can be an evidence of the person and this is usually done on a comparative basis.
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Metamorphosis is:______.a. changing of one body form to another within a species, such as the change from an aquatic tadpole to a terrestrial frog. b. an intermediate condition, such as length of legs in mice between longer legs of some mice and shorter legs in others, a condition caused by Hox genes. c. the evolutionary transition from fishes to amphibians. d. the developmental changing of a scale to a feather.
Answer:
changing i think
Explanation:
what are the different types of waste? and what are the methods used in biodegrable waste managment
2 ypes of waste liquid and solid
Explanation:
biodegradable waste can be found in municipal soild waste or sometimes called biodegradable municipal waste ,or as green waste ,food waste,paper waste and biodegradable plastic.other biodegradable waste include human waste ,manure,sewage,sewage sludge and slaughterhouse waste .
you can send it for recycling into compost.
you can treat biodegradable waste on an industrial scale by either composting or anaerobic digestion.
composting is more suitable for fibrous materials.
anaerobic digestion is more suitable for wastes and sludgest that degrade easily.
I have four brothers
"This is what type of
observation?
please please help!!
Answer:
First peak which touches the A line
what action is a reflex action
Answer:
A reflex action is an involuntary , quick response to a stimulus, which minimises any damage to the body from potentially harmful conditions, such as touching something hot.
Explanation:
a student hypothesized that pillar coral eat and digest zooxanthellae. which of these observations would cause the student to change this hypothesis
Answer:
the zooxanthellae in a pillar coral's body are alive
Which is most likely a source of air pollution? littering CFCs oil spill runoff
Answer: CFCs
Explanation: The other options aren’t as relevant to air pollution.
Answer:
cfcs
Explanation:
Arctic sea ice has declined over the past few decades causing water levels to increase. This is an interaction of which two spheres?
Answer:
Cryosphere and Hydrosphere
Explanation:
The Cryosphere refers to the frozen water bodies on earth. This includes glaciers, icebergs, ice sheets and frozen water surrounding the Arctic and Antarctica.
The Hydrosphere refers to all the water bodies on Earth, including rivers, streams, lakes, and ponds.
Answer:
Cryosphere and Hydrosphere
Explanation:
YOUR WELCOME
what is the si unit of energy
Answer:
Joule
Explanation:
Answer:
- the Joule (J)
Explanation: The Si unit of energy is the same as the unit of work. In slightly more fundamental terms, 1 joule is equal to 1 newton metre and, in terms of SI base units.
Consider a system in which low levels of protein "Q" triggers production of hormone A. The reaction of target cells of hormone A is to produce and release hormone B, which stimulates production of hormone C. In response to hormone C, the target cells up-regulate protein Q. In this scenario we see an example of _____.
Answer:
Negative feedback
Explanation:
Negative feedback is produced when a mechanism is amplified through an inverse loop, which tends to reduce the fluctuations in the system. In this case, the negative feedback mechanism represents a homeostatic response of the body where the release of a target hormone (hormone C) decreases in response to the increase of a protein (protein Q) upstream in the signaling pathway. Therefore, in this scenario, it is expected that negative feedback causes a decrease in hormone function.
A group of coordinately regulated structural genes with related metabolic functions, plus the promoter and operator sites that control their transcription, is called a/an ___________.
Answer:
They are called promoter and regulatory genes.
Explanation:
There are different genes responsible for regulating transcription:
These are the inhibitors, promoters and regulators.
Regulatory genes are in charge of regulating that promoter or inhibitor genes remain intact or do not present mutations.
Promoter genes promote cell replication, hence transcription.
In the case of malignant or benign neoplasms, there must be yes or if the affection of a regulatory gene plus the affection of an inhibitory or promoter gene.
here are times where you will be provided with BUD dates. When you do not have access to the BUD dates, you will have to determine that date yourself. What is the appropriate BUD date for a water containing oral formulation? Not later than 14 days Not later than 30 days
Answer:
Explanation: Not later than 14 days.
Beyond Use Date (BUD) is the date after which a compounded sterile preparation may not be stored or transported. This time is calculated from the date of compounding, and it is different from expiration date. This is because the BUDs are assigned with a different approach from those applied to assigning expiration dates to manufactured drug products. Also, compounded preparations are intended for administration following short-term storage. So, the BUD is the date after which a compounded preparation shall not be used. A reliable BUD is established to ensure that the preparation has an accepted quality and purity at least until the labeled BUD.
BUD is calculated by:
Type of container in which it is packagedHow long the medication will be takenType of drugHow fast is the drug degradatedStorage conditionsDosage of the medicationNature of the drug and its degradation mechanism Potential for microbial proliferation in the preparationFor Nonaqueous Formulation, the BUD is not later than 6 months or the time remaining until the earliest expiration date of any API (Active pharmaceutical ingredient), whichever is earlier.
For Water-Containing Oral Formulation, the BUD is not later than 14 days when it is stored at controlled cold temperatures.
For Dermal and Mucosal Liquid, Semisolid Formulations/Water-Containing Topical, the BUD is not later than 30 days.
The arrangement of leaves on a tree branch that reduces overlapping and overshadowingof leaves from sunlight is referred to as leaf …………………………………………………………This ensures exposure of most of the leaves to sunlight for maximum ……………………………………………..to take place in the ………………………………………………………………………of leaf cells. The grana contains numerous……………………………………………molecules which trap light………………………………….for ………………………………………………….of water, producing ………………………………………atoms required for the process of carbon (IV) oxide…………………………………………………………in the light……………………………………………………………stage of photosynthesis which takes place in the……………………………………………..of the chloroplast.
Answer:
phyllotaxy
photosynthesis
chloroplasts
chlorophyll
energy
oxidation
oxygen
reduction
independent
stroma
Explanation:
The arrangement of leaves that provide maximum exposure to sunlight is referred to as leaf phyllotaxy that reduces overlapping and overshadowing of leaves and supports maximum photosynsthesis.
The contains numerous chlorophyll molecules that trap the light energy for the oxidation of water and producing oxygen (O2) atoms required for carbon (IV) oxide reduction in light-independent, which takes place in the stroma of the chloroplast.
Hence, the correct answer in a sequential manner is as follows:
phyllotaxy
photosynthesis
chloroplasts
chlorophyll
energy
oxidation
oxygen
reduction
independent
stroma
Tara placed a grape in a solution, after sometime she noticed that the grape started to shrink.
a. Name the solution and explain.
b. Then Tara placed the raisin in a solution and noticed it started to swell up. Name the solution and explain
Answer:
a. Hypertonic solution
b. Hypotonic solution
Explanation:
There are basically 3 types of solutions in biology,
1) Isotonic-Same concentration of solute and solvent inside the grape and in the solution.
2)Hypotonic solution-More concentration of solvent in the solution than in the grape.
3)Hypertonic solution-More concentration of solvent in the grape than in the solution.
Now,
a. Tara had kept the grape in a hypertonic solution. The solvent will start draining from the grape to equalize the concentrations of solvent inside and outside. So, the grape shrank due to loss of water.
b. Tara kept it in a hypotonic solution. The solvent will start entering the grape to equalize the concentrations of solvent. So, the grape started swelling.
Mendel always got close to a 9:3:3:1 ratio for phenotypes in the F2 generation of any dihybrid cross. If false, make it a correct statement
a. True
b. False
Answer:
True
Explanation:
It is true that Mendel always got close to a 9:3:3:1 ratio for phenotypes in the F2 generation of any dihybrid cross. This validates his law of independent assortment of genes.
The 9:3:3:1 is usually gotten from any dihybrid cross of F2 generation. The results given are always 9 offsprings containing dominant traits, 3 offsprings each which possess a dominant and recessive trait and 1 offspring with a recessive trait.
which of the following is not irrational number?
(1)√2
(2)2/√6
(3)√36/1296
(4)-√6+6
Explanation:
hi !!
here i think all areirrational expect root 36/1296,
1. root 2= root 2= 1.414213562
2. 2/root 6= root 6 /3 = 0.8164965809
3. root 36/1296=1/6=1.66666667
4. - root 6+6= -2 root 3 = -3.464101615
so, they are extended and dont have exact value so all are irrational expect no. 3 because it can be expressed in 1/6 fraction form but others will come on root form.
Hope it helps...
Answer:
[tex]\frac{\sqrt{36} }{1296}[/tex]
Explanation:
[tex]\sf A \ rational \ number \ can \ be \ expressed \ as \ a \ quotient \ of \ two \ whole \ integers.[/tex]
[tex]\sqrt{2} = 1.41421356237...[/tex]
[tex]\frac{2}{\sqrt{6} } = 0.816497...[/tex]
[tex]\frac{\sqrt{36} }{1296} =\frac{6}{1296} =\frac{1}{216}[/tex]
[tex]-\sqrt{6} +6= 3.55051...[/tex]
[tex]\sf The \ rational \ number \ from \ the \ list \ is \ \frac{\sqrt{36} }{1296}[/tex]
Consider the following chromosomes and if they are affected by hemophilia. X - unaffected X chromosome, x = X affected by hemophilia, and Y = Y chromosome. If an Xx female and XY male have children, what fraction of their offspring will have an affected chromosome, and what fraction is likely to be affected by the hemophilia? (1 point) A. 1/4 and 1/2 B. 1/2 and 1/4 C. 1/2 and 1/3 D. 1/4 and 1/4 Ive been stuck on this for a while now, can someone please assist?
Answer:
B. 1/2 and 1/4
Explanation:
Hemophilia is a disease inherited in humans. It is only carried on the X chromosome, hence, it is said to be X-linked. In this question;
X - unaffected X chromosome
x = X chromosome affected by hemophilia,
Y = Y chromosome
Hence, in a cross between a Xx female (carrier) and a XY male (unaffected), the following chromosomes will be present in the gametes produced by each parent:
Xx- X and x gametes
XY- X and Y gametes
Using these gametes in a punnet square (see attached image), offsprings with genotypes: XX, Xx, XY and xY are produced.
XX (1) - unaffected normal female
Xx (1) - unaffected carrier female
XY (1) - unaffected normal male
xY (1) - affected male
Based on the questions;
- 2 out of the possible 4 children have the affected chromosomes i.e. both xY son and Xx daughter have the x chromosome. Hence, the fraction is 1/2
- 1 out of the 4 possible children is affected by hemophilia, which is the xY son. Hence, the fraction is 1/4.
Answer:
1/2 and 1/4
Explanation:
Took the test
Some food material is given
below. What are the diffrent
possible ways of cooking them?
Find out and write them.
Meat - Groundnuts - Potatoes
Spinach
Answer:
Meat-Boiling, Grilling, frying and roasting
Groundnuts-frying,boiling
Potatoes-Boiling frying and roasting
what are sex hormones?why are they named so? state their function.
Answer:
Sex hormones or hormones of the reproductive organs are certain cells in the reproductive organs that produce hormones.
The testis produces testosterone,the male sex hormone,and the ovaries produces oestrogen and progesterone, the female sex hormones.
In a sexually mature male,testosterone influences sexual behaviour, and together with FSH,regulates sperm production in the seminiferous tubules of the testes.
Sexually matured females undergo a regular 4-week reproductive or menstrual cycle during which a mature egg is released.This cycle is regulated by oestrogen and progesterone. During pregnancy, progesterone inhibits egg production (ovulation),brings about the development of the placenta and prevents the uterus from contracting....I hope this answers your question... Thank you for the question.
1. The Hawaiian Islands are examples of islands that formed over a hotspot. Based on this information, which of the following processes formed the Hawaiian Islands? (2 points) Melted rock called magma rose through holes in Earth's crust and gradually solidified as it cooled. Tectonic movement forced certain segments of Earth's crust downward and other segments upward in jagged chunks. One tectonic plate moved beneath another plate at a subduction zone, causing the rock to melt and rise above Earth's surface. Segments of Earth's crust bent and doubled over, and moving wind and water gradually shaped the rock into gently sloping domes.
Answer:
The correct answer is - Melted rock called magma rose through holes in Earth's crust and gradually solidified as it cooled.
Explanation:
The Hawaiian Islands are the chain of eight major islands situated in U.S. of Hawaii. These are formed over a hot spot. About 75 million years ago such hotspot took place in the center of the Pacific Plate.
There are hot spot due to the volconic activity and in the moving over the tectonic plate of a subduction zone. Volcanic activity and overriding of plates that cause rising magma by melting the moving down plates whice leads to volcanic arcs formation. The magma that rose gradually cooled down and become solid over the time. It is an example of a large seamount and island chain created by hot-spot volcanism.
Thus, The correct answer is - Melted rock called magma rose through holes in Earth's crust and gradually solidified as it cooled.
How do postprocessual archaeologists approach an artifact? A. They try to discover the time period the artifact came from. B. They seek to derive meaning from the artifact. C. They recreate the artifact in order to study it. D. They try to identify how the artifact has changed over time.
Answer:
c
Explanation:
c
Postprocessual archaeologists approach an artifact by the fact that they recreate the artifact in order to study it. Thus, the correct option for this question is C.
What is meant by Archaeologists?Archaeologists may be defined as a type of person who significantly studies and modifies some sorts of the buildings, graves, tools, and other objects of people who lived in the past. They work basically on human history and prehistory through the uncovering of sites.
Postprocessual archaeologists determine the complete movement of the archaeological theory that basically emphasizes the theory that deals with the subjectivity of the interpretation that is made by other kinds of archaeological branches.
Therefore, postprocessual archaeologists approach an artifact by the fact that they recreate the artifact in order to study it. Thus, the correct option for this question is C.
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what does Ecology mean
Answer:
a branch of science concerned with the relationships between living things and their environment or the pattern of relationships between living things and their environment.
Explanation:
What percentage of the Earth's surface do forests cover? 20% 30% 40% 10%
30% of the earth's surface is covered by forests.
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can DNA be extracted from dead cells
Which of the following is found in the 'rungs' of a DNA strand?
A. Uracil
B. Thymine
C. Deoxy Ribose
D. Phosphate
Answer:
Thymine
Explanation:
