The graphs below show the changes in crab color at one beach from 1950 to 1990.
The change in crab color is an example of which type of evolution?
O A. Stabilizing selection, because one crab color was preferred over other colors.
O B. Stabilizing selection, because two crab colors were preferred over other colors.
O C. Directional selection, because two extreme colors were preferred over the more moderate color.
O D. Disruptive selection, because two extreme colors were preferred over the more moderate color.
O E. Adaptive radiation, because crabs of a single color evolved to form crabs of several colors.
Answers
The change in crab color is an example of Disruptive selection because two extreme colors were preferred over the more moderate color. Thus, the correct option for this question is D.
What is Natural selection?Natural selection may be defined as the selection of a few individuals from any given population according to their favorable variations.
In 1950, the crab color is in the form of stabilizing selection, while in 1990, it changes to disruptive selection that favors the two extreme colors over the intermediate one.
Disruptive selection occurs when environmental conditions changes in two different directions. Due to which variance increases in population.
Therefore, the correct option is D.
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Related Questions
AID (Acquired Immune Deficiency Syndrome) affects red blood cells.
True
False
Answers
Answer:
False, it's stands for Acquired Immunodeficiency Syndrome
1. Why is Maya Lim excited about classroom bioprinters? 2. What parts of Maya Lim's job as a chemical engineer sound interesting to you?
Answers
Classroom bioprinters can be used to print literally any biological object, whereas a chemical engineer is responsible to use chemistry to develop processes and devices.
What is a bioprinter?A bioprinter is a device that combines cells and transcriptional growth factors, in order to generate structures similar to tissues and organs.
Moreover, a chemical engineer is aimed at exploring the chemical properties of matter to develop processes and devices.
In conclusion, classroom bioprinters can be used to print literally any biological object, whereas a chemical engineer is responsible to use chemistry to develop processes and devices.
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Determine which of the following statements is true about energy in ecosystems.
A. Primary producers lose 20% of the energy they absorb as urine and feces.
B. Consumers pass on 20% of the energy they get from a lower trophic level.
C. Primary consumers lose 60% of the energy they absorb from producers as urine and feces.
D. 10% of the energy Primary consumers absorb is lost as heat.
Answers
The community along with the biotic and abiotic factors makes the ecosystem. In the ecosystem, 10% of the energy primary consumers absorb is lost as heat. Thus, option D is correct.
What is an ecological pyramid?An ecological pyramid is the graphical presentation of the organism and the flow of energy at each trophic level. The trophic level constitutes the producers and the consumer.
The flow of energy follows the 10% energy rule where each trophic level loses and gains only a certain amount of heat. The heat is lost as excretory products in the environment.
The maximum amount of energy is gained by producers which passes to the primary consumers (10%), secondary consumers (1%), and the upper trophic level.
Therefore, option D. primary consumers absorb only 10% of energy.
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Select the correct answer.
Which is the correct definition of a large animal?
O A.
an animal that lives outdoors
OB.
an animal used for food, farming, or agriculture
OC. an animal of a large size that needs daily care
OD. an animal that needs large farms
Answers
Answer:
OC is the correct answer
What is the difference between a food chain and a food web?
A. A food web shows multiple food chains that are interconnected.
B. A food chain shows multiple food webs that are interconnected.
C. A food chain is used when there are no decomposers present, a food web includes them and shows the recycling of nutrients.
D. A food web is only used when organisms that have multiple ways of getting energy are involved, such as Omnivores.
Answers
Answer:
A
Explanation:
A food web shows multiple food chains that are interconnected.
plase help my and thanks . ammm
Answers
From the illustration, it can be said that the age of the rock layer is the same in the four locations of index fossil 1.
Age of fossilIt is a measure of how long a material has been fossilized.
Thus, if a rock layer contains a fossil and another similar rock layer does not have the fossil, one can conclude that the ages of the rock layers are different.
Only index fossil 1 is found in all the four locations as shown in the image. Hence, one can as well infer that the rock layers in all these four locations are of the same age.
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1. Those who were successful in Round One did not survive equally well when others were
competing for food at the same dish during round two. Which beak was not successful and why?
Answers
Large beak will not be successful if the food is small in size because they can't eat that food.
Which beak was not successful and why?
Large beak was not successful if there is small sized food is present on the dish while on the other hand, if the dish has big sized food then the small beak can't survive the second round because they are unable to eat that food.
So we can conclude that big beak will not be successful if the food is small in size because they can't eat that food.
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At which of these locations is a dietician least likely to work?
school
theater
hospital
nursing home
Answers
Answer:
B. Theater
Explanation:
Think about it. Would a dietician really work at an amusement park? That sounds ridiculous! If a dietician wouldn’t work at an amusement park, he or she would not work at a theater.
You’re welcome.
Name the cavity between the nose and mouth.
A. pharynx
B. larynx
C. trachea
D. Esophagus
Answers
The cavity which separate or in between the nose and the mouth is the nasal cavity.
The nose and the mouth meet at a junction called the pharnx; option A
What is nasal cavity?The nasal cavity refers to a large, air-filled space above and behind the nose in the middle of the face. It is the cavity which divides the nose and mouth.
However, the nasal septum divides the cavity into two cavities .
The larynx is the passageway for air between the pharynx above and the trachea below.The pharynx carries air, food and fluid down from the nose and mouth.So therefore, the cavity which separate or in between the nose and the mouth is the nasal cavity.
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1. A new species of multicellular, eukaryotic heterotrophs is discovered. This species secretes digestive enzymes to digest its food externally. Which taxa would this organism belong to?
A.
domain Archaea
B.
phylum Platyhelminthes
C.
kingdom Fungi
D.
kingdom Animalia
2. Mammals and reptiles both belong to the amniote clade. What is the evolutionary significance of this clade?
A.
Amniotes produce membranes that allow them to reproduce without laying eggs in water.
B.
Amniotes produce milk to feed their offspring.
C.
Amniotes were the first vertebrates to evolve limbs specialized for living on land.
D.
Amniotes were the first vertebrates to evolve jaws for digesting the tough food found on land.
3. Which of the following is an example of negative feedback leading to homeostasis?
A.
a sponge conforming its internal salt concentration to match the salinity of its environment
B.
a frog slowing its metabolic rate while hibernating over the winter
C.
a cat’s uterine contractions increasing in strength as it gives birth to a litter of kittens
D.
a human sweating to reduce his or her body temperature on a hot day
Answers
2.In the evolutionary process, mammals and reptiles evolve Amniotes produce membranes that allow them to reproduce without laying eggs in water.
What are aminiot animals?Amniote animals are those that have amnion surrounding the embryo, while non-amniotes do not have this membrane.
3.Homeostasis in environments can have as a negative example a sponge conforming its internal salt concentration to match the salinity of its environment.
By saving too much the marine environment limits the lives of other animals causing them to migrate in this way, there will be a collapse in the food chain.
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Understand biological structures and the different human body systems
Answers
Answer:
The nine major organ systems in the human body are the integumentary system, the musculoskeletal system, the respiratory system, the circulatory system, the digestive system, the excretory system, the nervous system, the endocrine system, and the reproductive
hope it helps you
What is spermatogenesis and sporophyte?
Answers
Answer:
Explanation:
1. Production of sperm by meiosis
2. diploid generation which alternates with haploid (in plants)
Help please . when and where would you expect to find the highest rate of primary productivity?
o a. in the temperate regions during the summer months
o b. in the polar regions during the summer months
c. in the polar regions during the fall
o d. in the tropics during the fall
Answers
Expected to find the highest rate of primary productivity in the tropics during autumn
In which ecosystems is primary productivity highest?The more sunlight the system receives, the greater the productivity. Thus, in tropical regions — where there is more sunlight and temperatures are higher throughout the year — productivity is higher than in places with a
temperatecold or polar climate.With this information, we can conclude that Expected to find the highest rate of primary productivity in the tropics during autumn
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May I get some help with his homework question?
Answers
what best discribes a possible negative impact of irrigation of farmland
Answers
Answer:
Food can be produced in dry areas.
Explanation:
This can be rice.
What adverse effects does covering the land with concrete and asphalt create?
Vegetation and trees cannot grow.
The flow of water in rivers is changed.
Non-native species are introduced to a foreign environment.
Natural resources are depleted.
Answers
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What is the largest species of sea turtle in the world.
Answers
Answer:
The leatherback turtle
Explanation:
The Leatherback is the largest sea turtle existing today, which can reach up to 2000 pounds in weight and 8 feet in size.
How do pollutants add to the problem of plastic in the ocean?
Answers
Answer:
Sea creatures will choke on it and suffers and die and it could make the water brown/unhealthy and sea creature may get stuck in the junk and die after that way.
How many independent variables should you test at a time?
A two
B one
C as many as you want
D three
Answers
Answer:
b - one
Explanation:
testing only 1 independent variable at a time ensures that one factor causes a change in your dependent variable
testing more than 1 makes it unclear which independent variable caused a change in the dependent variable
Where is the nucleus usually located?
A. outside of the cell
B. in the center of the cell
C. moves between cells
Answers
Answer:
B
Explanation:
usually in the center . depends on what cell prokaryotic or eu
Runoff from a uranium mine stockpile has contaminated the surface water in a location. This might cause health problems among people in the location. Which of these is the best plan to solve this problem? (4 points)
Plant trees around uranium mines to absorb contaminants.
Put fences around uranium mines to check the flow of contaminants.
Wear protective clothing for prevention against harmful effects of radiation.
Collect the runoffs in retention ponds for isolation and recovery of contaminants.
Answers
The best best plan to solve the problem of contamination in the surface water is to collect the runoffs in retention ponds for isolation and recovery of contaminants.
What is surface runoff?Surface runoff is an overland flow of excess water (with or without accumulated contaminants) that cannot be absorbed by the ground as infiltration.
According to this question, runoff from a uranium mine stockpile has contaminated the surface water in a location. This might cause health problems among people in that region.
However, one way to curb the problem of contamination in the surface water is to collect the runoffs in retention ponds for isolation and recovery of contaminants.
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Compare the use of RFLP to PCR in the study of DNA. What is one difference between these two methods?
A. RFLP is one of the newest methods used; PCR is one of the oldest.
B. RFLP is considered by scientists to be more useful than PCR.
C. RFLP is better to use with samples that have mold on them than PCR.
D. RFLP requires larger samples of DNA than PCR requires.
Answers
The one difference between RFLP and PCR is that RFLP requires larger samples of DNA than PCR requires.
What is RFLP and PCR?Restriction fragment length polymorphisms, or RFLPs, are differences among individuals in the lengths of DNA fragments cut by enzymes.
Polymerase chain reaction, or PCR is a technique in molecular biology for creating multiple copies of DNA from a sample.
These two techniques are used in the study of DNA, however, one difference between RFLP and PCR is that RFLP requires larger samples of DNA than PCR requires.
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During respiration, what do consumers such as animals release?.
Answers
Answer:
carbondioxide
Explanation:
during respiration consumers release carbondioxide an inhale oxygen
Jayden is researching the Earth's
plates. How would he describe the
relationship between the Earth's plates
and soil and rocks?
Answers
Answer:
Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth's mantle. Convection currents describe the rising, spread, and sinking of gas, liquid, or molten material caused by the application of heat.
The Earth's plates have a crucial relationship with soil and rocks. This connection is characterized by the plates' movement influencing the formation, distribution, and composition of soil and rocks across the planet.
The asthenosphere, which is semi-fluid beneath them, is separated into many tectonic plates that make up the Earth's lithosphere. Convective currents in the mantle cause these plates to move constantly. Processes like subduction, in which one plate falls beneath another, and rifting, in which plates move apart, are fueled by this movement. Mountains, valleys, and oceanic basins are all the result of these dynamic processes, which have a significant impact on the surface of the Earth.
Through volcanic activity and metamorphism, interactions between the plates also aid in the production of different types of rocks. Therefore, the distribution and makeup of soils and rocks on our globe are significantly shaped by plate movement, which also has an impact on landscapes, ecosystems, and geological characteristics.
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Drinking alcohol during pregnancy negatively impacts development of the fetus because
Answers
Drinking during pregnancy can also cause foetal alcohol spectrum disorder (FASD) after birth
(Hope this helped?)
Which led most directly to the decline of the latin language?
oa. the death of joan of arc
ob. fear of witchcraft
oc. the great schism
o d. interest in poetry
Answers
The great schism was what led to the decline of the latin language and is denoted as option C.
What is Great schism?This was characterized by Christianity being divided into two divisions, Roman Catholic and Eastern Orthodox.
This led to the latin language being replaced with others such as Greek etc in this scenario.
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If you were building a swimming pool in your yard, what two metric units would be BEST suited for the measurements?
centimeters and kiloliters
meters and kiloliters
kilometers and milliliters
decimeters and deciliters
Answers
Answer: Meters and Kiloliters
Answer: meters and kiloliters
Explanation:
Which of the following is a scientific observation about the bird pictured
below?
Scarlet ibis
A. The pink feathers are especially beautiful.
B.The long beak helps the bird eat insects.
C.The scarlet ibis is the national bird of Trinidad.
D. The bird's features are red.
Answers
Answer: Yup, B should be correct :)
Answer:
B
Explanation:
B is the most "scientific" of the options
Energy in this ecosystem passes directly from the sun to.
Answers
Answer:
Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules. The energy stored in the bonds to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as movement.
Explanation:
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When humans plant more trees, carbon can begin entering the _______________ as carbon dioxide.
Answers
Answer:
Hydrosphere, geosphere or biosphere
Explanation: