Answer:Toothed whales do not make the long, low-frequency sounds known as the whale song. Instead they produce rapid bursts of high-frequency clicks and whistles. Single clicks are generally used for echolocation whereas collections of clicks and whistles are used for communication.
PS: PLEASE DO NOT PUT A LINK I AM NOT GOING TO OPEN THE LINK IN THE ANSWER SECTION!!
what are the improvements in human society that have allowed the human population to increase in size exponentially? (choose all that apply)
a. agriculture
b. cleanliness
c. industry
d. medicine
Answer:
medicine................
Answer:
a. agriculture
b.cleanliness
d. medicine
Explanation:
took the test! :)
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What property of silver may discourage people from buying silver jewelry?
A. it can’t float
B. it’s not green
C. it can tarnish
D. it’s not transparent
Answer: C
Explanation: Because if silver is tarnished it will lose its luster, thus making it not attractive.
Why are antibiotics unhelpful for treating the common cold?
A. Colds are caused by bacteria.
• B. Antibiotics attack only bacteria.
• C. Antibiotics cannot treat disease.
D. Colds are caused by antibiotics.
B. Antibiotics attack only bacteria.
Which of the following experimental approaches is least likely to be used in identifying transcription factor binding sites?
a. Electrophoretic-mobility shift assay
b. Northern blotting
c. DNA footprinting
d. Chromatin immunoprecipitation
Northern blotting is the least likely to be used in identifying transcription factor binding sites. Therefore, option "B" is correct. Northern blotting is used for the analysis of RNA in the given sample. The samples can be tissue, blood, and serum.
The RNA is purified from the given sample. The sample might contain fragmented RNA which is purified and amplified. The target RNA is separated by using an electric current. The RNA moved through the gel which act like a sieve-like matrix. The movement of the fragments depends on the size of the fragments. Smaller fragments move faster than larger ones in Northern blotting.
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The immune response generates some side effects that can be unpleasant. what their potential benefits could be?
The ability to recognize, respond to, and remember a variety of pathogens.
Scientific developments have made forensic science a stronger discipline.
True
False
Answer:
Answer of this qurstion is true
Look at the chart below to answer this question. Which substance is the LEAST dense of the three substances?
Substance A
Substance B
Substance C
Answer:
Substance B
Explaination: Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float. Density is a characteristic property of a substance and doesn’t depend on the amount of substance.
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ALL MATTER HAS THE SAME PROPERTIES.
A. True
B. False
Answer:
false
Explanation:
some don't
Answer:
FALSE
gases and solids and liquids all have very different properties, thats not even mentioning plasma and BEC
Explanation:
thanks for the opportnity sir
PLSS HELP
What is NOT an adaptation that pioneer species need? *
A. ability to do photosynthesis
B. live without soil
C. the ability to grow tall
D. tiny roots to break down rock
Explanation:
Primary succession, type of ecological succession (the evolution of a biological community’s ecological structure) in which plants and animals first colonize a barren, lifeless habitat. Species that arrive first in the newly created environment are called pioneer species, and through their interactions they build a simple initial biological community. This community becomes more complex as new species arrive. Primary succession is distinguished from secondary succession, which is the recovery of an existing biological community after a disturbance sets back the community’s ecological structure to an earlier stage.
Fears of malpractice lawsuits are playing a part in the increased use of expensive diagnostic equipment. T F
Answer:
True.
Explanation:
True, Fears of malpractice lawsuits are playing a part in the increased use of expensive diagnostic equipment.
Hope this helps!
The tendency of a cell or an organism to maintain a stable internal environment is known as _______.
A.
homeopathy
B.
homology
C.
homogeneous
D.
homeostasis
Compared to the inertia of a 1-kilogram mass, the
inertia of a 4-kilogram mass is
A. 16 times as great
B. 1/16 as great
C. 1/4 as great
D. 4 times as great
please help.
Answer:
D. 4 times as great
Explanation:
The inertia of an object is the resistance offered by the object to change in its motion or position.
Then concept of inertia is obtained from Newton's first law of motion which states that an object which is not subjected to any net external force will remain its position of rest or constant velocity of motion until some net external force acts on it. The object at rest will then start to move whereas the object moving at constant velocity will experience a change in its speed or direction of motion.
This reluctance to change position is greater, the more massive an object is as well as the higher the speed of motion of the object. Thus, inertia is directly proportional to the mass of the object as well to the velocity of an object in motion.
From Newton's first law, inertia can be calculated as the force to be overcome to mobile an object, i.e. Inertia = F = ma
Where m is mass of object, a = acceleration of the object.
Objects on the earth's surface experience a constant acceleration, g.
Thus for a 1 kg mass, Inertia = 1 × g
For a 4 kg mass, inertia = 4 × g
The inertia of a 4 kg mass is four times as great as a 1 kg mass.
The inertia of a 1-kilogram mass, the inertia of a 4-kilogram mass is - D. 4 times as great
Inertia is the property of matter that resists changes in motion. Mass is the quantitative matter of motion.
Mass is that quantity that is solely dependent upon the inertia of an object.The more inertia that an object has, the more mass that it has.A more massive object has a greater tendency to resist changes in its state of motion.Thus, the inertia of a 1-kilogram mass, the inertia of a 4-kilogram mass is - D. 4 times as great.
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identity the function of the cell membrane. what is the function of the cell membrane? please explain
the growth of plant seedlings is usually
A.phototropic and gravitropic
B.thigmotropic and gravitropic
C.phototropic and influenced by ethylene
D.gravitropic and influenced by ethylene
Answer:
The correct answer is - A. phototropic and gravitropic.
Explanation:
A plant seedling grows usually two-direction shoots or stems towards light and roots towards the soil or in the direction of gravity. The movement of the plant toward a specific stimulus or effect parts is called tropism and different parts move in a different direction.
The movement of the roots of the plant is usually towards the direction of soil or gravity and this is called gravitropic. The shoot or stem grows from the seedling towards the direction of light and it is called phototropic.
When a small square is sectioned off for study and the plants, animals, and other organisms in that section are counted, the study is called a:______
When a small square is sectioned off for study and the plants, animals, and other organisms in that section are counted, the study is called a quadrat sampling.
Quadrat sampling is also referred to as quadrat study. In ecological research, it is a method used to determine the number or density of organisms in a certain specific area.
It involves dividing the study area into smaller, equally sized plots or squares called quadrats. The size of the quadrat depends on the organisms being studied and the scale of the research.
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if i am studying the number of organisms in one species and how they are affected by external and internal factors, which study am i looking at?
does this an suggest evolutionary relationship? explain how these embryos can be used as evidence of a common ancestor between each of these six organism
Answer:
Examination of vertebrate embryos reveals that during corresponding stages of early development,
the embryos appear to be very similar. For example, all vertebrate embryos pass through stages in
which they have gill pouches. The pouches eventually develop into the gill apparatus in fish; in laterevolving vertebrates that do not have gills, the gill pouches undergo further refinement and develop
into structures associated with the head and neck. Similarly, all early vertebrate embryos have tails,
which persist in some animals but regress during the later stages of development of humans. Thus,
the individual development of an animal occurs through a series of stages that paint a broad picture
of the evolutionary stages (phylogeny) of the species to which it belongs.
"Ontogeny recapitulates Phylogeny", Haeckel
Explanation:
sure po ito
Examination of vertebrate embryos well-known shows that in corresponding levels of early improvement, the embryos appear very similar.
For example, all vertebrate embryos by skip thru levels in which they have got gill pouches. The pouches subsequently turn into the gill equipment in fish; in later evolving vertebrates that don't have gills, the gill pouches go through similar refinement and develop into systems related to the pinnacle and neck. Similarly, all early vertebrate embryos have tails, which persist in a few animals however regress at some point in the later levels of improvement of humans.What is ontogeny recapitulates phylogeny?These scientists claimed that ontogeny recapitulates phylogeny (ORP). This word shows that an organism's improvement will take it thru every one of the personal levels of its evolutionary history, or its phylogeny.
Thus, the man or woman improvement of an animal happens thru a chain of levels that paint an extensive picture of the evolutionary levels (phylogeny) of the species to which it belongs.
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What nitrogen base does Cytosine pair with
Answer:
Guanine
Explanation:
There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine)
Adenine always bonds with thymine, and cytosine always bonds with guanine.
recycling possibility of plastic Water bottle need
Answer:
bird feeder, terrarium, bottle top bag seal, piggy bank, watering containers, hanging baskets
How might biology help you to better understand environmental issues?
Answer:
An understanding of biology can help you make choices and decisions that affect your health. Biologists and other scientists research environmental issues such as pollution, biodiversity,land conservation, and natural resource use.
Explanation:
Hope this helped Mark BRAINLIEST!!!
In a population of 100 people, 30 have brown hair and 70 have black hair. What is the Relative Frequency for Black hair?
Answer:
0.7
Explanation:
Given that in statistics, the Relative Frequency is the Frequency of the class divided by Total.
Hence, in this case, the Relative Frequency of black hair is the Frequency of black hair divided by the Total.
Hence, we have 70 ÷ 100
=> 0.7
Therefore, the correct answer is 0.7 Relative frequency.
Connell’s results led him to conclude that Chthamalus’ realized niche is smaller than its fundamental niche because of interspecific competition with Balanus. But what if competitive exclusion were not the explanation? What if Chthamalus’ and Balanus’ respective niches were a result of niche differentiation instead? Niche differentiation occurs when two species with overlapping niches change over time in a way that reduces their niche overlap, and thus reduces their competition for resources.
Answer:
Both realized niche and fundamental niche are similar in size.
Explanation:
If Chthamalus’ and Balanus’ respective niches were a result of niche differentiation so we can say that Chthamalus’ realized niche is not smaller than its fundamental niche. It will be of the same size because of no interspecific competition with Balanus. The whole fundamental niche is considered the niche of the Chthamalus' alone due to no competition with Balanus' for resources present in the ecosystem.
Distinguish between natural selection and artificial selection.
Answer: Natural selection is based on the adaptive characteristics of animals. Artificial selection is based on the desirable characters selected by humans. Only beneficial or favorable traits are inherited over the successive generations by natural selection. Natural selection is performed on all the types organisms; Artificial selection is processed on some selective organisms of humans desires. ... Natural selection results in the transformation of the entire population of a species; Artificial selection brings out the new variety of that species.
Explanation:
Answer:
answer in explanation
Explanation:
Natural selection occurs over a long period of time and happens naturally. artificial selection happens relatively fast and occurs when humans choose a certain trait they like and help the animal with that trait reproduce.
Assume you saw biofilm formation on the negative control slide. What could account for such an observation? A You left the slide to incubate for too long. B The crystal violet dye was contaminated. с You used non-sterile slides or filter paper.
If biofilm formation is observed on the negative control slide, it could be due to either leaving the slide to incubate for too long (Option A) or using non-sterile slides or filter paper (Option C).
In biofilm experiments, the negative control is expected to show no biofilm formation since it does not contain the target microorganisms or conditions necessary for biofilm growth. If biofilm is observed on the negative control slide, it suggests that something went wrong during the experimental procedure. Option A suggests that the slide was left to incubate for too long, allowing unintended microbial growth and biofilm formation. Option C suggests that non-sterile slides or filter paper were used, introducing microorganisms or contaminants that can form biofilms. Both scenarios result in the presence of biofilms on the negative control slide, indicating a procedural error or contamination issue.
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List 5 different carrer pathways someone who studies Plant Science/ Horticulture might take. WILL MARK BRAINLIEST
Answer:other dude is correct gimme brainlest
Explanation:
Answer: plant/science- Agronomist.
Floral designer.
Biotechnologist.
Plant journalist.
Field advisor.
Soil scientist.
Greenhouse manager.
Propagation scientist.
horticulture- plant breeding, genetic engineering, landscape design, farming, floral design, research, nursery production, education, food science, landscape construction and management, pest control, marketing
Explanation:
The primers you used in lab amplified 145 base pairs that were adjacent, but not included in the repeat. If you used a different primer that only amplified 130 base pairs adjacent to a 14 base pair repeat, and you had 4 repeats in your product, what was the size of your final PCR product?
186
214
158
200
172
Answer:
186
Explanation:
The Polymerase Chain Reaction (PCR) is a technique used in molecular biology to amplify small segments of DNA. This technique uses a pair of oligonucleotide sequences called 'primers' which bind to opposite strands of the heat-denatured DNA template in order to amplify this target DNA sequence. In this case, the DNA template is composed of a single unit of 130 base pairs (bp) and four repetitive units of 14 bp, so the final PCR product will have 186 bp >>> 130 bp + (14 bp x 4) = 130 + 56 = 186.
Match the items in column B with the descriptive statements in column A Column A Column B 1. structure that suspends the small intestine from the posterior body wall a anus b. appendix C. circular folds d. esophagus e. frenulum f greater omentum 9. hard palate h. haustra i. ileocecal valve j. large intestine k. lesser omentum I mesentery m. microvilli n. oral vestibule o. Peyers patches p. pharynx q. pyloric sphincter r. rugae 2. fingerlike extensions of the intestinal mucosa that increase the surface area for absorption 3. large collections of lymphoid tissue found in the submucosa of the smal intestine 4. deep folds of the mucosa and submucosa that extend completely or partially around the circumference of the small intestine 5. mobile organ that manipulates food in the mouth and initiates swallowing 6, conduit for both air and food 7, food passageway that has no digestiverabsorptive function 8. folds of the gastric mucosa 9 pocketike s of the large intestine 10. projections of the plasma membrane of a mucosal epithelial cell 11. valve at the junction of the small and large intestines 12, primary region of nutrient absorption 13. membrane securing the tongue to the floor of the mouth 14. absorbs water and forms feces 15. area between the teeth and lips/cheeks 16. wormlike sac that outpockets from the cecum 17. initiates protein digestion 18. structure attached to the lesser curvature of the stomach 19. covers most of the abdominal organs like an apron 20. valve controlling food movement from the stomach into the duodenum 21. posterosuperior boundary of the oral cavity 22. region containing two sphincters through which feces are expelled from small intestine t· soft palate u stomach v. tongue the body 23. bone-supported anterosuperior boundary of the oral cavity
Structure that suspends the small intestine from the posterior body wall and valve controlling food movement from the stomach into the duodenum
1. k. lesser omentum, 2. m. microvilli, 3. o. Peyers patches, 4. C. round folds, 5. v. tongue, 6. d. throat, 7. a. rear-end, 8. r. rugae, 9. h. haustra, 10. I. ileocecal valve, 11. j. digestive organ, 12. p. pharynx, 13. e. frenulum, 14., q. pyloric sphincter, 15. n. oral vestibule, 16. b. reference section.
17. f. more noteworthy omentum, 18. u. stomach, 19. 1. structure that suspends the small digestive system from the back body wall, 20. 1. structure that suspends the small digestive system from the back body wall, 21. 9. hard sense of taste, 22.
23. bone-upheld anterosuperior limit of the oral cavity, 23. 9. pocketlike sacs of the digestive organ, Segment A gives distinct explanations about different physical designs and works, while section B contains the comparing replies.
For instance:
- The design that suspends the small digestive system from the back body wall is replied by 1. structure that suspends the small digestive tract from the back body wall, which relates to the lesser omentum (k).
- Fingerlike augmentations of the gastrointestinal mucosa that increment the surface region for retention are replied by microvilli (m).
- Enormous assortments of lymphoid tissue found in the submucosa of the small digestive system are Peyers patches (o).
- Profound folds of the mucosa and submucosa that expand totally or somewhat around the boundary of the small digestive system are round folds (C).
By coordinating the things in segment A with the comparing depictions in section B, the connections between the physical designs and their capabilities can be perceived.
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what is the most serious drawback to using library screening to study genetics?
The most serious drawback to using library screening to study genetics is that it can result in the identification of gene fragments that are not in the correct orientation or order.
What is Library screening?Library screening is a procedure that allows researchers to isolate clones that express a specific protein or contain a specific gene. A genomic library or a cDNA library may be used for this technique.
What are the other disadvantages of library screening?The other disadvantages of library screening are given below: Library screening, when compared to PCR, is a relatively time-consuming and labour-intensive process. Library screening's capacity to recover a specific gene is highly dependent on the library's quality, complexity, and redundancy. A library may lack certain sequences that are required to discover the gene of interest.
There may be errors or ambiguities in the data collected by the researchers. In a library, the sequences discovered may not necessarily be the most significant for research purposes.
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Which statement is true of the adaptive, but not the innate, immune system?
Choose 1 answer:
A. Many cells work together to coordinate the response.
B. It involves the use of lymphocytes.
C. It fights both viruses and bacteria.
D. The receptors are highly specific.
Answer: The receptors are highly specific.
Explanation: yes
Answer:The receptors are highly specific
Explanation:
just took the quiz :)
Please help...Will mark brainiest....It is due and I need help
Answer:
Explanation:
For the 1st one with the Cheetah: It would be a long tail because it helps them balance when they turn. Sinch Cheetahs move extremely quickly they need a balance to ensure they don't topple over when they turn, this tail provides this balance.
For the 2nd one with the bear: Thick coats on a bare will help provide warmth whenever they go to hybernate. Thin fur would leave room for freezing and wouldn't be able to help them maintain the proper body temperature.
The 3rd one with the clownfish: A round tail provides a bigger boost when swimming since it is able to push more water. A forked tail would create a gap when they swim so they would have to expend more energy than with a round tail.
The 4th one with the Finch: Since grubs live underground a thinner beak would be able to dig them out and stab them faster. This allows them to reach farther and get more food.
Answer:
D AZ FCSDF SDF F
Explanation:
just seeing how this works don't mind me