Answer:
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
Explanation:
Which is the best evidence that two species have a common ancestor?
A:The two species have the same diet.
B:The two species live in the same habitat.
C:The two species' skeletal structures are 90% identical.
D:The two species' DNA sequences are 90% identical.
Answer:
I'd go with D.
Explanation:
Species may share similar physical features because the feature was present in a common ancestor (homologous structures). Molecular biology. DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are.
The actual exchange of gas occurs at the
Answer:
gas station, or butt
Explanation:
the gas station can fill your car and exchange gas with the pump. when you fart you exchange gas with the air.
Red squirrels and gray squirrels have been the native species on an island for many years. A few years ago, black squirrels entered this island. The black squirrel is an invasive species. Invasive species aren't native to the ecosystem. They move into an ecosystem because of natural changes or human intervention. Red squirrels and black squirrels have identical food requirements, but gray squirrels have a different diet. What three effects will these events have on the island's squirrel population?
Answer:
1. There will be direct predation of species.
2. There will be competition for limited resources like breeding sites, prey.
3. Transmission of diseases or they can cause danger to the native species.
Explanation:
Invasive species are species of organisms that are not natural to an ecosystem and move to an ecosystem because of natural changes and human intervention. Islands are prone to the invasion of invasive species because they don't have predators and there is no competition that control populations in their ecosystem. The invasion of black squirrels will lead to competition for limited resources like breeding sites or prey, the black squirrels will begin to predate other squirrels because they have different nutrients requirements and they can transmit diseases to other squirrels if they are carrier.
Answer:
B C D
Explanation:
GOT IT RIGHT ON PLATO
The changing of the rivers created more ____________ for animals
aRegeneration
bVegetation
c Erosion
d Habitats
Answer:
D) Habitats for animals.
Explanation:
It depends what the question means when it says 'the changing of the rivers'. I took it as the rivers are changing size and becoming more spread out. In that case, I chose habitats.
The more water there is, the more habitat there is for sea life.
All in all, the correct answer is D).
which bone layer holds calcium and other minerals
Answer:
In addition to its mechanical functions, the bone is a reservoir for minerals (a "metabolic" function). The bone stores 99% of the body's calcium and 85% of the phosphorus. It is very important to keep the blood level of calcium within a narrow range. If blood calcium gets too high or too low, the muscles and nerves will not function. In times of need, for example, during pregnancy, calcium can be removed from the bones. This process is carefully regulated by hormones and is discussed more completely in the section about hormones.
Explanation:
Answer:
its the um (dont quote me ) phophorus im pretty sure
Explanation:
2 Points
Which best describes the blood flowing in a vein?
O A. It moves toward the heart.
B. It contains no red blood cells.
O C. It is oxygen rich.
D. It contains no white blood cells.
Select the correct answer. PLZ HELP 11+points
Where do humans fit in the food web?
A)carnivores
B)decomposers
C)omnivores
D)producers
Answer:
C - Omnivores
Explanation:
Answer:
C. Omnivores
Explanation:
Humans consume both plants and animals, so they’re omnivores. Producers make their food in the presence of sunlight. Carnivores eat other consumers. Decomposers consume dead plants and animals.
what is the best definiton of genetically motified foods? HURRYYY!!! please and thank youuuu
Answer:
GMO, or genetically modified foods, are foods that are messed with genetically by science to better benefit the human race. For example, scientists might replace genes that give corn a lower harvest, with a different gene in corn that makes a higher amount of harvest.
Explanation:
You could also look it up. Just search "GMO".
Which functions are aided by swimmerets in crustaceans? Check all that apply. attachment to host gas exchange prey capture reproduction swimming
Answer:
b,d,e
Explanation:
I took the assignment.
The functions that are aided by swimmerets in crustaceans are gas exchange, reproduction, and swimming.
What do you mean by Crustaceans?Crustaceans may be defined as any of a large group of mostly water animals, that have tough outer shells, two pairs of antennae, and limbs that are jointed.
Crustaceans are organisms that belong to aquatic habitats where play performs their functional role and increase their survival rate effectively.
Therefore, the functions that are aided by swimmerets in crustaceans are gas exchange, reproduction, and swimming.
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Where is DNA located in your body?
Answer:
DNA is in the nucleus of nearly every cell in your body.
Explanation:
DNA is housed in the nucleus because it is the genetic material and needs to be protected.
Answer:
The DNA is located in the nucleus.
Explanation:
Humans and animals are EUKARYOTES which means we have a nucleus, where the DNA is stored. PROKARYOTES do not have a nucleus to the DNA is stored in the cytoplasm.
~Anna
The chart shows information about three different embryos early in their development.
Which is best supported by the information in the chart?
Species X and Y are not related to humans.
Species Y and Z are not related to humans.
Species X and Z are related to humans.
Species X and Y are related to humans.
Answer:
Species X and Y are related to humans.
Explanation:
The chart shows information about three different embryos early in their development. The best supported by the information in the chart is that Species X and Y are related to humans. Thus, option D is correct.
What is an embryo?An embryo refers to the early development stage with respect to the multicellular organism. The organism should be again produced se-xually. Moreover, the development of embryonic should be a portion of the life cycle just done after fertilization and continued via when the structure of the body is formed like tissues and organs.
The development of embryonic i.e. used for proof with respect to evolution should be related species that contain the same embroys.The similarities during the embryo stage of development among different animals are due to the expression of ancient genes.
These ancient genes have the same evolutionary origin, thereby they are homo-logous sequences. For example, fish embryos and human embryos express certain homo-logous genes in the embryos stage, thereby leading to the development of gill slit during this stage.
Therefore,Thus, option D is correct.
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what is the role of a cytoplasm
Answer:
Cytoplasm is responsible for giving a cell its shape. It helps to fill out the cell and keeps organelles in their place
Explanation:
Cytoplasm contains molecules such as enzymes which are responsible for breaking down waste and also aid in metabolic activity.
Describe how C. parvum obtains the glucose it needs for glycolysis after it has infected another cell. Explain the role of lactate dehydrogenase in enabling C. parvum to continue producing ATP by glycolysis.
Answer:
Cryptosporidium parvum is an apicomplexan pathogen that obtains glucose either directly from its host or by the degradation of polysaccharides.
Explanation:
C. parvum only can produce ATP by glycolysis. Lactate dehydrogenase (LDH) is a universal enzyme required to synthesize pyruvate, which is the final product of the glycolysis process. This enzyme has been subject of research to understand the metabolism and evolution of apicomplexan parasites, including C. parvum.
Cryptosporidium parvum is a pathogenic agent that causes the disease cryptosporidiosis. The pathogen obtains glucose directly from the host. It can also obtain by the breakdown of polysaccharides.
C. parvum produces ATP through glycolysis. The enzyme lactate dehydrogenase is used by the C. parvum to generate metabolic ATP. It generates this ATP through the glycolytic pathway. The enzyme allows the conversion of NADH to NAD+. NAD+ is necessary for glycolysis to produce ATP. Metabolic energy plays a crucial role in the growth and proliferation of the pathogen in the host.
Some of the features of C. parvum are:
It consists of a unique lactate dehydrogenase enzyme to yield ATP. It causes the disease in the gastrointestinal tracts. The pathogen is used for research and understand its ability to obtain ATP directly from the host.Therefore, C. parvum consists of enzyme lactate dehydrogenase that helps in energy production through the glycolytic pathway.
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How do I compare and contrast these?
The messages that scientists are sending into space are directed at intelligent alien life. Do
you think this is limiting? How could this affect scientists search for life beyond Earth?
Answer:
I think there is life beyond earth. Actually there most definently is. I think in a way it could be limiting. It's the fcat that the ones out there may not even be able to receive the message as fast as we please. Who knows, it could be years, decades, maybe centuries before they make actual contact with us. Then again, maybe they already have. But, the way this could affect the study is the fact that (I doubt it) but maybe a message could be sent the wrong way, or they misinterpret it. That's the only think I can get off. Anyway, this can also depend on how much funding is going into space. This also brings up the question, "How much do we know about our own planet?
Help.. 14 _____ are substances that can cause cancer.
15
Scientists join cancer cells with antibody-producing white blood
cells to produce _____.
Answer:
14. Carcinogenic
15. Not sure. I believe it is monoclonal antibodies.
How does your heart rate affect the rate at which red blood cells travel throughout your body? PLEASE HELP ME QUICK!!
Answer:
with each heartbeat,the heart pumps blood throughout our bodies,carrying oxygen to every cell,after delivering oxygen the blood returns to the heart the heart then sends the blood to the lungs to pick up more oxygen.
The Immune System is built on millions of cells called
Answer:
White blood cells: lymphocytes, neutrophils, and monocytes
Explanation:
Lymphocytes are processed in the bone marrow and then migrate to the lymphoid organs. The cells of the immune system are white blood cells: lymphocytes, neutrophils, and monocytes.
The immune system comprises of many biological structures and processes within an organism that provides resistance to infection and toxins.
The high temperature on Friday was 8 degrees above zero. The low temperature was 3 degrees below zero. Which expression gives the average of the low and high temperatures?
a
Left-bracket negative 3 + (negative 8) right-bracket divided by (2) Right-bracket
b
(negative 3 + 8) divided by 2
c
(negative 3 + 8) divided by (negative 2)
d
Negative (3 + 8) divided by 2
Answer:
B
Explanation:
The negative goes by the 3 because it is 3 degrees below zero. To find averages, you add the numbers and divide by how many numbers there are. in this case, it would be (-3+8)/2
Which type of organism developed first?
A. Chordates
B. Vertebrates
C. Deuterostomes
D. Sponges
Answer: D sponges, i just got this wrong lol
Explanation:
Why sponges develop first?
Sponges belong to the oldest and most simple animals that had evolved, and their discovery in such old rocks meant that they may have been the first animals.
How did sponges evolve?
Among extant animals, only sponges could have evolved directly from protozoa without changing feeding mode.
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Put the steps of the carbon cycle in order using Step 1 as your starting point. Step 1: Carbon dioxide is
taken in by plants during photosynthesis.
The cycle repeats when the carbon stored in the atmosphere as carbon dioxide gas is
taken in
The animal releases the carbon dioxide back into the atmosphere during respiration.
The animal eats a plant and uses its carbohydrates for energy.
DONE
Answer:
step four
step three
step two
Explanation:
2. What are the two types of ecological succession?
Answer:
There are two main types of succession, primary and secondary. Primary succession is the series of community changes which occur on an entirely new habitat which has never been colonized before. For example, a newly quarried rock face or sand dunes.
Explanation:
Answer:
Ecological succession is a process of change in ecosystems that takes place over time, and that we can observe both in time and in space. ... There are two types, the primary sequence and the secondary sequence.
"I hope it helps you it was a pleasure to help you".
Explanation:
what is the change in size of a group of organisms of the same species over time
A) population growth
B) death rate
C) birth rate
D) immigration and emigration
Which of the following infectious disease agents is the smallest? A Bacteria B Virus C Fungus D Parasite
Answer:
B. Virus
Explanation:
With the exception of Virods and Prions, viruses are the smallest infectious disease agents.
After viruses, bacteria are the smallest, then fungi, and lastly parasites.
Answer:
virus
Explanation:
When population grows past the ecosystem’s carrying capacity, what happens to the population?
A. Continues to grow
B. The population starts to die off to return to carrying capacity
C. The population will go extinct due to lack of resources
D. The population grows, then finds a new carrying capacity.
Answer:B animals will die since there arent enough resources for everyone until there is enough for the remaining population to use
When Population growth past the ecosystem’s carrying capacity, then the population starts to die off to return to carrying capacity (Option B).
The carrying capacity refers to the maximum number of individuals of a population that can be supported by particular environmental conditions.Carrying capacity depends on both biotic factors (e.g., presence of predators, food availability, etc.) and abiotic factors (e.g., water availability, living space, etc).When a population passes its carrying capacity, then the environment becomes unsuitable for the individuals of that population to survive.In conclusion, when population growth past the ecosystem’s carrying capacity, then the population starts to die off to return to carrying capacity (Option B).
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During photosynthesis blank energy is converted into blank energy
Answer:During photosynthesis solar energy is converted into chemical energy
Explanation:
1. Why is the bird on the right more likely to pass on its genes than the bird on the left?
2. Why would some variations/traits be passed on to the next generation and some seem to disappear over time?
3. What type of adaptation/traits do you think would be good to pass on to your children?
Answer:
1because it has a bigger and larger beak
2because of the development of the technology, genes change overtime and more now because of the global warming
3somewhere natural,traits:values,justice,self defense,to take care of the environment, etc
Which organisms would have the most similar traits?
Answer:
Organisms in the same family will have the most similar traits.
Organisms mostly will be the same when they are in the same family, and if there are two organisms in different families that look alike, it will be a coincidence.
Answer: organisms in the same order
Yeet Skeet
Which traits would Aristotle have used to classify sharks? Choose more than one answer.
Answer:
The main trait that was different between sharks 14 and 9 was that shark 14 (Mobulidae) has a front with two points that look like horns, whereas shark 9 (Dasyatidae) has a front with no points that look like horns.
Explanation:
The traits that Aristotle would have used to classify sharks are :
Front with points ( hornlike )Front without points Sharks classificationSharks whose front have two points like horns are classifed by Aristotle as sharks 14 (Mobulidae). whlie sharks whose front does not have two points like horns are classifiesd as sharks 9 ( Dasyatidae ). hence the traits that would have been used by Aristotle to classify sharks is the presence of points at the front.
Hence we can conclude that the traits that Aristotle would have used to classify Sharks are Front with points and front without points.
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HELPPPPPPP!!!!!!
An interglacial is a period of time that occurs between Ice Ages. During previous interglacials, the CO2 levels in the atmosphere were about 300 parts per million (ppm). In 2013, they were approximately 420 ppm. Rounding to the nearest percent, what is the percent increase in CO2 between these two time periods?
Answer:
40% increase
Explanation:
Percentage Increase Formula:
Percentage Increase=[(Final Value−Starting Value)/|Starting Value|] ×100%
To Calculate Percentage Increase:
1) Subtract final value (later value) minus starting value (initial value)
2) Divide that amount by the absolute value of the starting value (initial value)
3) Multiply by 100 to get percent increase
Keep in mind: If the percentage is negative, it means there was a decrease and not an increase.
So for your problem,
[(420-300)/300]*100% = 40% increase
