Answer:
b: chloroplasts are used in photosynthesis
Explanation:
not a: cause chlorophyll makes plants green not brown
not c: cause its used in photosynthesis
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7. What is the speed of the sound in air of 250 C temperatures
A. 336m/s B.325m/s
C.346m/s
D.355m/s
8. Calculate the speed of sound if the temperature of the vibrating water is28-
A.346m/s
B.347.8m/s
C. 350m/s
D.349.1m/s
9. An echo occurs when sound
A. is trarismitted through a surface
B. is reflected from a distant surface.
C. changes speed when it strikes a distant surface.
D. all the above
10. The change in direction of a sound wave around corners is called
A. diffraction B. interference
C. refraction
D. reflection
11. You can hear noises a long distance away over water at night because
A. of lowered temperature. B. water conducts sound better at night. C. Sound is reflected off water more e
night. D. Of refraction of sound in air.
12. What is the BEST reason why a lot of people love to sing inside the bathroom?
A. because of privacy
B. because the bathroom creates an aurally pleasing acoustic environment
C. because of resonance
D. because the small dimension of the bathroom makes someone comfortable
13. The technique used by bats to find their way or to locate food is
B. RADAR
C.ECHOLOCATION
D. FLAPPING
A. SONAR
14. What kind of wave is sound wave?
A. shock wave.
B. standing wave.
C. transverse wave.
D.longitudinal wave.
15. When does resonance occur?
A. when objects of different natural frequencies are forced to produce vibration
B. when objects vibrate
C. when sound is reflected
D. when one object vibrates at the same natural frequency of a second object
Answer:
i think is c
Explanation:
After an organism dies, it stops taking in radioactive carbon-14 from the environment. If the carbon-14:carbon-12 ratio ( / ) in a piece of petrified wood is one sixteenth of the ratio in living matter, how old is the rock
Answer:
Age of rock= 22920 years
Explanation:
Carbon-12 isotope is a stable isotope whereas carbon-14 isotope undergoes radioactive decay. The half-life of carbon-14 isotope = 5730 years
Since the ratio of carbon-14 to carbon-12 = 1/16 : 1; number of times carbon-14 isotope decayed n
(1/2)ⁿ = 1/16
(1/2)ⁿ = (1/2)⁴
n = 4 times
time(age) for decay = n * half-life
Therefore, age of fossil = 4 * 5730 years
Age of rock = 22920 years
Pick one of the body parts shown in Sammi's model. How would a disease or injury to this organ affect the process modeled? How would it affect the body as a whole
Answer:
the heart is what makes every moving part working inside our body even though the brain is the one who tells them or gives them signals to work. the heart is what keeps them alive and if the heart takes any kind of negative damage the would not take care of everything it's supposed to.
Explanation:
Hope this helps
The body part picked is ; The Heart
An injury or disease to the heart will stop the whole body functioning and the process modeled will be distorted
The heart in the body is equivalent to the engine of a car, The heart pumps oxygen carrying blood cells into all the organs and without this oxygen carrying blood cells the whole body will stop functioning ( i.e. The organs will be dead ).
An injury or disease to the Heart will negatively affect the distribution rate of blood to all parts of the body and this will negatively affect the overall wellbeing of the body and this will also negatively affect the process been modeled as well.
Hence we can conclude that The body part picked is ; The Heart , and An injury or disease to the heart will stop the whole body functioning and the process modeled will be distorted
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When you stop growing, your cells stop dividing.
True
False
Help please
Answer:
Absolutely not mitosis and meiosis don't stop until your heart stops beating.
It is false that When you stop growing, your cells stop dividing.
When you stop growing, it does not mean that all your cells stop dividing. In fact, cells in the human body continue to divide and replenish throughout life, albeit at different rates depending on the type of cell.
The human body is composed of various cell types that have different lifespans and rates of cell division. For example, cells in the skin, gastrointestinal lining, and blood undergo continuous division and turnover to replace old or damaged cells. These tissues are constantly renewing themselves.
However, some cells, such as neurons in the brain and muscle cells, have limited or no capacity for cell division after a certain stage of development. These cells primarily grow in size rather than dividing to create new cells. Therefore, not all cells in the body continue to divide once growth stops.
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There are many reasons why all humans do not perceive sounds similarly in our environment, including adaptation, hearing loss and/or deafness.
For 2A-2D, first determine whether the scenario is an example of sensory adaptation, conduction deafness, sensorineural deafness, and/or central deafness.
Second, for the scenarios that are examples of deafness, explain briefly how the scenario leads to deafness (i.e., how does the scenario alter normal auditory processing). If you have selected sensory adaptation as an answer, explain briefly why the scenario does not fall under the categorization of deafness. Use your own words to briefly explain - simply listing definitions is not sufficient. (2.5 points each for matching, 5 points each for correct justification)
2A. Listening to excessive loud noises everyday over years that causes loss of stereocilia
2B. Hearing construction outside when it first begins, but no longer noticing the sound minutes later
2C. Difficulty understanding speech, but no damage to ears or ability to understand nonverbal sounds
2D. A hole in the tympanic membrane caused by an ear infection
Answer:
2A. central deafness
2B. sensory adaptation
2C. sensorineural deafness
2D. conduction deafness
Explanation:
2A. Listening to excessively loud noises every day over the years that causes loss of stereocilia is an example of central deafness.
Central deafness could lead to deafness either partially or completely of one or both ears due to persistent exposure of the eardrum to loud noise every day for years. when it happens in years that is gradual damage which is usually common compared to sudden deafness. Stereocilia can be damaged with a persistent loud noise.
2B. Hearing construction outside when it first begins but no longer noticing the sound minutes later is an example of sensory adaptation.
In sensory adaptation, the sensory system tends to get adapted to a change in the sound that comes from the environment usually with that sound remaining constant over time. The sensory system get used to the constant stimuli, in this case, the construction outside and with time the system tends to make the stimuli less sensitive.
Sensory adaptation does not fall under the categorization of deafness because, though prolonged exposure of the hears to loud noise could lead to deafness, Sensory adaptation is just an adaptive feature of the hearing system and it could be a loud or low sound or noises.
2C. Difficulty understanding speech, but no damage to ears or ability to understand nonverbal sounds are an example of sensorineural deafness.
Sensorineural deafness involves the ability to hear sound but not to understand speech. Sounds may not be clear but the sufferer could hear a loud noise and it is usually caused if the part of the hearing that collects impulses and sends them to the brain become damaged.
2D. A hole in the tympanic membrane caused by an ear infection is an example of conduction deafness.
The tympanic membrane is also known as the Eardrum, the vibration of this membrane after being hit by stimuli from sounds is part of the fore process to allow the interpretation of sound by the brain. So when there is a hole in the eardrum conduction deafness would occur as the sound wave from the environment is blocked failing to be conducted through the eardrum.
environmental science aim to solve problems such as the extinction of a specific animal or plant species and deal with important issues such as
Answer:
Explanation:
A 6th grade class was presented with the following statement the amount of water on the surface of earth today is the same amount as 1000 years ago half of the class argued that the statement was true as the other half argued the statement was false, argue how you know your choice is correct
Answer: It's true
Explanation:
The Water cycle. It continues on and on it doesn't stop.
Describe how a rainforest can reach a point when it cannot be restored by secondary ecological succession
Answer:Although the secondary forest will be low in diversity and poorly developed, the forest cover will be adequate for some species to return (assuming they still exist). The solution must be based on what is feasible, not overly idealistic, and depends on developing a new conservation policy built on the principle of sustainable use and development of rainforests. Beyond the responsible development of rainforests, efforts to rehabilitate and restore degraded forest lands along with the establishment of protected areas are key to securing rainforests for the long-term benefits they can provide mankind.
Explanation:
i lloke dit up online because i have not did this yet
A very high damaged leads to no restoration of rainforest by secondary ecological succession.
A rainforest can reach a point when it cannot be restored by secondary ecological succession when the large portion of the rainforest is destroyed and most of diversity is vanished. At this time, restoration is impossible due to very high damages.
Ecological resilience is the ability of an ecosystem to be restored through secondary ecological succession after a severe disturbance. Rainforest have a high biodiversity that helps it to resist damage but at a certain limit so we can conclude that very high damaged leads to no restoration of rainforest by secondary ecological succession.
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_________ are organisms that consume other organisms.
A:Autotrophs
B:Heterotrophs
C: Producers
D: Plants
What is the difference between active transport across a cell membrane and diffusion across a cell membrane?
In humans, the dominant allele N causes an abnormal shape of the patella in the knee, whereas n is the recessive normal allele. A separate gene is concerned with finger length, and the dominant allele B causes abnormally short fingers, whereas b is the recessive normal allele. A study focused on people who have both abnormal patellae and short fingers. These individuals were N/n . B/b in genotype, having inherited the N allele from one parent and the B allele from the other parent. These N/n . B/b people mated with normal spouses, producing 40 progeny classified as follows: Normal 3 Abnormal knees and short fingers 2 Abnormal knees only 17 Short fingers only 18
Explain why the four types of children were found in the proportions shown.
Draw the chromosomes of (i) the parents of the N/n . B/b individuals; (ii) the N/n . B/b individuals; and (iii) the four types of children, showing the proper positions of the alleles based on the data above.
Answer:
1) Children were found in the proportions shown because the two genes are linked, they do not assort independently from each other
2) The chromosomes draw is in the attached file
Explanation:
Due to technical problems, you will also find the explanation for the first question in the attached files (PDF).
How many times does cytokinesis occur in Meiosis?
Answer:
Two Times
Explanation:
In meiosis, cytokinesis must occur twice: once after telophase I and again, after telophase II.
Phosphatidate (phosphatidic acid) is a precursor in the synthesis of some lipids. Phosphatidate (phosphatidic acid) is a branched molecule. The core of the molecule is a three carbon chain. Carbon one is single bonded to two hydrogens, and a side chain. The side chain is oxygen single bonded to carbon. The carbon is double bonded to oxygen and an R 1 side chain. Carbon two of the core chain is single bonded 1 hydrogen and to oxygen which is single bonded to carbon. The carbon is double bonded to oxygen and single bonded to an R 2 side chain. Carbon three is single bonded to two hydrogens and a phosphate group. P O 4 2 minus. Phosphatidate (phosphatidic acid) Identify the lipids that have phosphatidate as a precursor.
Answer:
1. Phosphatidylethanolamide: The substituent head-group is ethanolamine
2. Phosphatidylcholine: The substituent head-group is choline.
3. Phosphatidylserine: The substituent head-group is serine
4. Phosphatidylglycerol: The substituent head-group is glycerol
5. Phosphatidylinositol-4,5-bisphosphate: The substituent head-group is myo-inositol-4,5-bisphosphate
6. Cardiolipin: The substituent head-group is phosphatidylglycerol
The attachment below shows the structures of the glycerospholipids
Explanation:
Phosphatidic acid is the parent compound in glycerophospholipids.
The core of phosphatidic acid is glycerol to which two fatty acids are attached by means of ester linkages to the first ad second carbon atoms. The third carbon atom is attached to a phosphate group. The alcohol group of the phosphate group serves as a point of attachment for the polar head group of other lipids derived from phosphatidic acid. These lipids include:
1. Phosphatidylethanolamide: The substituent head-group is ethanolamine
2. Phosphatidylcholine: The substituent head-group is choline.
3. Phosphatidylserine: The substituent head-group is serine
4. Phosphatidylglycerol: The substituent head-group is glycerol
5. Phosphatidylinositol-4,5-bisphosphate: The substituent head-group is myo-inositol-4,5-bisphosphate
6. Cardiolipin: The substituent head-group is phosphatidylglycerol
Which of the following natural processes is most likely to create large mounds of sand along the coastline?
Water eroding sand from the coastline
Wind depositing sand from other locations
Wind causing erosion faster than deposition Water weathering sand from the nearby rock
Brainliest will get 50 points
Answer: Water eroding sand from the coastline
Water eroding sand from the coastline is the natural processes is most likely to create large mounds of sand along the coastline
What are the properties of water ?Water is the chemical substance having chemical formula H2O, one molecule of water consist of two hydrogen atoms which are covalently bonded to a single oxygen atom.
The physical property of Water are, it is a colorless and tasteless liquid, have extensive hydrogen bonds resulting in unusual properties in the condensed form.
This also have high melting and boiling points. As compared to other liquids, water has a higher specific heat, thermal conductivity, surface tension, dipole moment, etc.
Water is a great solvent and helps in the transportation of ions and molecules required for metabolism, has high latent heat of vaporization helps in the regulation of body temperature.
It is Amphoteric nature can act as both acid and base means that it is amphoteric in nature, it is Electropositive elements which reduce water to hydrogen molecule and it is the source of hydrogen.
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3. What are the different science processes demonstrated in the activities
performed?
The hypoxic zone in the Gulf of Mexico is not unique; at least 200 dead zones exist at estuaries and along seacoasts worldwide. These low-oxygen regions share many of the same causes, and they all have ecological and economic repercussions for ecosystems and people. Fortunately, we can pursue strategies to lessen the number, severity, and impacts of dead zones. The following list includes examples of factors that contribute to the development of dead zones (the cause), the consequences that result from dead zones, and possible solutions. Which of the following are consequences of dead zones?
a. Economic losses for fisher's
b. Death or aquatic organism that cannot escape
c. Policies to promote no-till agriculture
d. Construction of wetlands to absorb nutrients
e. Nutrient runoff from agriculture fertilizers, manure, and urban sources, which leads to rapid algal growth and subsequent bacterial decomposition
Answer:
Answer:
e. Nutrient runoff from agriculture fertilizers, manure, and urban sources, which leads to rapid algal growth and subsequent bacterial decomposition
Answer:
Explanation:
Run off from agricultural wastes which contain Nitrogen and Phosphorus are the major sources causes dead zones.The process where these chemical get washed into the aquatic bodies is called Eutrophication.
These substances leads to algae boosts in the water.The increases population of the algae consumes the available oxygen in the water, therefore making the oxygen concentration drops or no oxygen at all;(Hypoxia)
As the algae population feed on the available resources in the water they exhausted this,and later die.
When the decomposing bacteria used the oxygen in the water to breakdown the dead algae they make use of the available oxygen.This further reduced the oxygen availability and therefore reduces the oxygen and hence the zone becomes the dead zone, because little or no oxygen is available for survival of organisms.
This is reversible if the process if europhication or other causes is eliminated
Explanation:
Explanation:
What performs more functions human cells or bacterial cells and why
Answer:
It is human cells
Explanation:
What is the closest star to the Sun?
Hint: Watch one of the SML videos on "Who wants to be a Millionaire" (Super Mario Logan).
Answer:
already have.
Explanation:
What is the structure shown in the figure?
Carbohydrates
Proteins
Lipids
Nucleic Acids
what will most likely happen if the plankton population decreases in this ocean system
Answer: The shrimp population would decrease.
Explanation:
Which direction below is a step in preparing a wet-
mount slide?
O Press a specimen and a drop of water
between two glass microscope slides.
O Insert a drop of water between a cover slip
and the glass slide.
O Add a drop of water onto a specimen, and
place a cover slip on top.
Add a drop of water onto a specimen on a
glass slide, and clip it onto the microscope
stage.
Answer:
O Add a drop of water onto a specimen, and
place a cover slip on top
Надеюсь это поможет
Answer:
C.) Add a drop of water onto a specimen, and place a cover slip on top.
HELPPP PLEASE!! i need this answered asap pleaseee
Answer:
D.Uses oxegin for photosynthesis
Explanation:
Plants use CO2 (carbon dioxide) for photosynthesis
You are performing an experiment with Primase, using a specific DNA template. In this experiment, you provide NTPs (ATP, UTP, CTP, GTP) which contained only one radioactive phosphate group, in the alpha-phosphate position (the alpha- phosphate is the one attached to the sugar. the other phosphates are beta and gamma). After RNA synthesis occurs, you separate the resultant RNA strand any of the NTPs that have not been incorporated into the RNA, and measure the radioactivity of the newly synthesized RNA.A) In this experiment, would you expect the newly synthesized RNA be radioactive? Explain why.B) If you forgot to add CTP when you did the experiment, would the resulting RNA be radioactive?C) If you did the experiment, with all the NTPs provided, but only the beta phosphate was radioactive for each of the NTPs, would radioactivity be found in the RNA? Explain why.D) If you did the experiment, with all the required NTPs, but only the ATP was radiolabelled Would radioactivity be found in the RNA? Explain why.
Answer:
(a). Yes.
(b). RNA becomes Radioactive.
(c). No.
(d). It depends. If the gamma phosphate and beta phosphate are not labeled, then the RNA will have certain degree of radioactivity.
Explanation:
So, let us do right into the explanation behind the answers to the questions asked.
(a). The answer to this part of the question is "Yes" because in creating or in the formation of the glycosidic bond, all the alpha phosphate group were taken into consideration that is they were all used, thus making the newly synthesized RNA to be radioactive.
(b). The RNA becomes Radioactive is the answer to this part of this question because CTP is needed in the experiment.
(c). The answer to this part (c) of this question is ''No'' because the only thing that takes part in bonding is the alpha phosphate.
(d). It depends. If the gamma phosphate and beta phosphate are not labeled, then the RNA will have certain degree of radioactivity.
The directing effect of multiple substituents is dominated by the most powerful activator. Which is the most powerful activator for vanillin
Answer:
- OH group is the most powerful activator
Explanation:
The most powerful activator for Vanillin is the - OH group and this is due to the effect of the +R on the - OH group and also there is more overlapping experienced in -OH groups compared to - OCH3 group
attached below is the reaction scheme
Which climate zone is hot and receives a lot of precipitation throughout the year?
Answer: Tropical
Explanation:
What happends if a cell were to have an interphase 1 and 2 when doibg meiosis
Why do thermos bottle keep cold beverages contained inside them from getting warm?
A diagram of the human digestive system is shown below removing which organ would have the smallest impact on the digestion absorption and elimination
Answer:
Esophagus
Explanation:
esophagus provides a passway between the mouth and stomach otherwise it has no other major function in digestion, absorption and elimination.
A cold front creates what kind of weather?
Answer:
A cold front creates nasty weather.
Explanation:
1. Rain
2. Thunderstorms
3. Gusty winds
4. Tornadoes
the cycle of processes by which water circulates between the earths, Oceans, at atmosphere and land.?
Water cycle
[Hope this is what your looking for!]
Answer:
water cycle?
Explanation: