Open Circulation:
Open circulatory systems are common to most arthropods and mollusks. They have a heart that pumps blood into a hemocoel. The blood then diffuses back into the blood vessels.
Tissues tend to be surrounded by blood, and the blood flows freely throughout the body tissues. In this type of circulatory system, blood tends to be sluggish because it is diffusing rather than readily being pumped through vessels.
Animals with an open circulatory system tend to be small organisms, so the blood doesn’t have far to travel. These animals typically have low metabolisms. They don’t tend to need quick energy or immune defenses.
Closed Circulation:
In a closed circulatory system, the blood stays within blood vessels. In this way, blood is kept separate from body tissues. This system has a heart that pumps blood through a continuous circulation pattern. As such, the blood tends to be pumped at a higher pressure.
In organisms with a closed circulatory system, the blood does not fill body cavities. Many vertebrates, such as humans, have a circulatory system known as the cardiovascular system and a secondary system known as the lymphatic system.
Animals with a closed circulatory system tend to be larger than those with an open circulatory system—consider, for example, an elephant versus a grasshopper. This type of system can transport blood to extremities while maintaining a higher blood pressure than the open circulatory system.
There are several different heart configurations for an animal with a closed circulatory system. Most mammals have a four-chambered heart, which separates the oxygenated blood from the deoxygenated blood. A fish has a two-chambered heart, which pumps blood directly to the gills to become oxygenated and then throughout the body. Amphibians have three-chambered hearts, where oxygenated and deoxygenated blood mix within the heart before being pumped to the body.
Alleles practice: Am i right? though it says this is possible
Answer:
Yes I'm pretty sure it's right
Explanation:
It looks right I looked over it and it looks good
What creates an electric current in
a battery?
Answer: ELECTRONS JUMPING dont forget to leave a review and a thanks
Explanation:Electrons jumping
pls help. Which is the example of long bone?
Answer:
it's either c or d but I'm not sure
Explanation:
The example of birds having different shaped beaks illustrates all of the following EXCEPT...
a) A species can adapt in order to vary its diet.
b) Similar species can inhabit the same environment.
c) Animals on land are very different from those in the sea.
d) Adaptation allows species to compete in the same ecosystem.
Answer:
C
Explanation:
Animals can adapt even if they are from the sea. The rest of the answers are true facts.
similarities between earth and Jupiter
Answer:
they are both circle. They are the part of solar system.
Please modify the sentence below to make it a TRUE statement.
Strip mining is less harmful to the environment than shaft mining, but more dangerous to miners.
Strip mining is more harmful to the environment than shaft mining, but less safe to miners.
What are the environmental impacts of mining?The main impacts of mining are:
environmental water turbidity and increased water pH quality, change in size can be more acidic), soil and water flow with metals, quality to be provided in economic environments.So in this case, Strip mining is more harmful to the environment than shaft mining, but less safe to miners.
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why osmosis is special case of diffusion?
Answer:
Diffusion can be called as osmosis in some cases because if the substance is liquid and passes through a semi-permiable membrane then its osmosis.
WELCOME!
Answer:
Osmosis is a special kind of diffusion because in both cases there is a movement of particles from a higher concentration region to a lower concentration region. The only difference is that osmosis is applicable to the movement of the solvent only through the semi-permeable membrane where the solvent is water.
Explanation:
What role do humans play in the loss of species and ecosystem services?
Answer:
Just as humans can have a stabilizing effect on their ecosystems, they can also play a destructive role.Explanation:
how do births and deaths in a population affect its size?
Answer:
it doesn't affect size directly but affect no. as when death increase the offsprings increases to compensate its loss ,as cell doesn't live much it doesn't take enough nutrition so for your question it does affect but not a distinctive theory
2. Inputs to a closed system may be
A. matter only
C. matter and energy
B. energy only D. heat only
Answer:
B
Explanation:
Why do large-scale convection currents occur in the atmosphere?
Explanation:
Convection drives the circulation of air in the earth's atmosphere. The sun heats the air near the earth's equator, which becomes less dense and rises upward. As it rises, it cools and becomes less dense than the air around it, spreading out and descending toward the equator again.
Which organs are important parts of the immune system?.
Answer:
Organs and tissues important to the proper functioning of the immune system include the thymus and bone marrow, lymph nodes and vessels, spleen, and skin
n this experiment, you need to examine the idea of thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, but limit your question to only two.
The thermal conductivity and temperature difference between the surrounding plays a crucial role in the transfer of thermal energy between the materials.
What are the three modes of thermal energy transfer?The three modes of thermal energy transfer include conduction (direct contact of atoms), convection (migration of warm particles), and radiation (migration of electromagnetic waves).
The first property is thermal conductivity. Examples include a cube of ice when positioned in the hand of a man. It causes the ice to melt via the thermal conduction from men's hands.
The second property is the temperature difference. Examples include when a hot cup of tea mingled with a cold glass of water. It changes the temperature to a new value which is different from the exact temperature of both initial fluids.
Therefore, it is well described above.
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WILL GIVE BRAINLIEST
The illustration shows an ocean food chain and the concentrations of the toxin DDT at each trophic level. What conclusions can be made as to how DDT impacts this food chain? Include where the concentration of DDT is likely to be lowest, and where it is likely to be highest
DDT increases as it moves up a food chain.
Explain how?DDT increases or biomagnifies if we look at a food chain. DDT is fat-soluble, which means animals store it in fatty tissues. It also takes a relatively long amount of time to break down.
Thus, if a predator consumes multiple organisms and each organism has a small amount of DDT, the amount of DDT in the predator is going to be the result of all of those small amounts combined.
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Before complex development of a fetus can begin, implantation into the uterine wall must occur. What gets implanted in the uterine wall?
Answer:
Embryo
Explanation:
A egg cell is fertilised to form a zygote which is diploid(contains two sets of chromosomes) and then it divides again and again into a ball of cells by mitosis and then it is implanted
How do bacterial species build antibiotic resistance?
Explanation:
So when u take antibiotics you kill lots of the bacteria. however you don't kill all of them. the bacteria that is left over hasn't been killed because they are resistant to the antibiotics taken. if left these bacteria will reproduce and build and species resistant to that type of antibiotics which can be incredibly dangerous. this is why it is necessary to finish your full antibiotics course so even if u feel better just to make sure you kill all the bacteria.
Which planet has a temperature range of 400C to -200C?
Answer:
Mercury and Venus
Explanation:
Why did no one believe Wegner’s Theory of Continental Drift or Plate Tectonic Theory?
Answer:
Experts firmly believed in another theory (that the continents and oceans were fixed in position), and Wegener did not provide a strong evidence which would enable continents to move in the manner he claimed.
Why is knowing agricultural statistics, background information, and soil characteristics about the territory in which your farm is located important?
Knowing the agricultural statistics of where your farm is located is important because it can help a farmer to identify the efficiencies that will lead to more productivity and profitability, less input costs, and optimized fertilizer use. The background information is important to farmers because it helps a farmer know whether or not the ground is good for growing crops, if something had happened to the land before their use. Soil characteristics are important to farmers because fertile soil is important for crop growth. The soil needs to be able to allow water and air to infiltrate, roots to be able to move more, and for biota to be able to thrive.
Which organisms are prokaryotes?
archaea
fungi
protists
plants
Archaea are prokaryotes.
What are prokaryotes?The simplest form of life on our planet is made up of single celled organisms called prokaryotes that lack any nucleus or membrane bound organelles. Despite their basic structure compared to eukaryotic cells they have extreme significance for our environment as they constitute the majority of life forms on Earth.
Prokaryotes can be broadly divided into two groups: bacteria and archaea. Bacteria outnumbers all other types present globally and flourish across all possible conditions - both regular and adverse including tough terrains like hot springs or acidic lakes; however archaic forms can survive even some brutal conditions such as deep sea zones or within rocks.
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Which of the following choices is an example of agricultural biotechnology?
A) Farmers use radar to predict storms.
B) Farmers cross-breed two species of cows to create a new breed that produces more milk, but requires less food.
C) Farmers rotate crops to keep soil nutrient-rich.
D) Farmers replant an orchard every 20 years to keep trees strong and productive.
Answer:
B)
Explanation:
genetically modifying livestock in a sustainable manner as higher yields are produced and less feed is used.
Describe the relationship between a thermal inversion and pollution.
Answer:
With a stronger inversion (greater thermal difference between inversion and mixing layers), less pollution can disperse into higher atmospheric levels. Likewise, the longer an inversion lasts, the more pollution will build up, and the worse the air quality in the mixing layer will be
Explanation:
Do humans share a common ancestor with yeast? How do you know?
HELP PLSSSSSSSSSS
Planet A has a tilt a of five degrees. What seasonal changes would be expected on this planet?
Extreme temperature changes between seasons
Little to no change in temperatures between seasons
Seasonal changes along the equator only
Seasonal changes at the poles only
Answer:
B. Little to no change in temperatures between seasons.
Assuming planet A is the earth, the earth is very slightly rotated on its axis toward the sun and Jupiter, so there would not be a dramatic change if we tilted the earth 5 degrees.
Where does most of the power in homes come from?
Answer: Natural Gas
Explanation:
Electricity and natural gas are the most-used energy sources in homes. Electricity is used in almost all homes, and retail electricity purchases accounted for 43% of total residential sector end-use energy consumption.
17) Determine the expected phenotypic ratio of offspring from a cross between a striped watermelon
with thick skin and a light green watermelon with thick skin
• Striped watermelons result from a cross between a light green watermelon and a dark green
watermelon
●
Thick skins are dominant to thin-skins
[5]
Parents:
The expected phenotypic ratio of offspring from a cross between a striped watermelon with thick skin is 1/2 thick skin and 1/2 striped watermelon.
What is dominance?In genetics, dominance refers to the expression of a given allele or gene variant in heterozygous individuals.
In dominance, this dominant allele masks the expression of the recessive allele for a given gene locus.
In conclusion, the expected phenotypic ratio of offspring from a cross between a striped watermelon with thick skin is 1/2 thick skin and 1/2 striped watermelon.
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Explain the difference between active and latent viruses.
Answer:Both are viruses that are going to invade and reproduce in a host cell. The difference is that an active virus immediately takes over the cell and a hidden virus stays “hidden” and waits a while to take over.
Explanation:
Almost 40% of the world population and many ecosystems are suffering from water scarcity. Many actions taken in the past have led to the water shortage being experienced today. Evaluate each of the factors listed below. All of these have led to water scarcity EXCEPT: A) sea-level rise B) population growth agricultural demand D) climate change, including drought
Answer:
Water scarcity already affects every continent. Around 1.2 billion people, or almost one-fifth of the world's population, live in areas of physical scarcity, and 500 million people are approaching this situation. Another 1.6 billion people, or almost one quarter of the world's population, face economic water shortage (where countries lack the necessary infrastructure to take water from rivers and aquifers).
Water scarcity is among the main problems to be faced by many societies and the World in the XXIst century. Water use has been growing at more than twice the rate of population increase in the last century, and, although there is no global water scarcity as such, an increasing number of regions are chronically short of water.
Water scarcity is both a natural and a human-made phenomenon. There is enough freshwater on the planet for seven billion people but it is distributed unevenly and too much of it is wasted, polluted and unsustainably managed.
Explanation:
number of times Jesus healed people who were possessed
Answer:
37 times Jesus has healed people!
Explanation:
Describe a selected aspect of present and past climate and the associated physical parameters (eg, temperature, precipitation, sea level) or chemical composition (e.g. ocean pH) of the atmosphere geosphere, hydrosphere or cryosphere, related to the severe weather phenomena you chose. Include changes over time.
Tsunami impacts are expected to be intensified due to climate change related sea level rise.
Tsunami and the sea levelSea level rise can significantly amplify the risk of tsunamis, which means that small tsunamis in the future could have the same adverse impacts as large tsunamis today.A modest 0.5 meter rise in sea level will double the risk of tsunamis in Macau.
With this information, we can conclude that tsunami impacts are expected to be intensified due to climate change related sea level rise.
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