When the ventricles contract, the valve prevents blood flow from the:
A ventricle to atrium
B atrium to ventricle
C left ventricle to the right ventricle
D right atrium to the left atrium
mention the effects of radioactivity on the environment
These celestial bodies are thought to originate from two different sources. Some are called long-period and originate from the Oort Cloud. These bodies orbit the Sun but may take as long as 200 years to complete one orbit. Others are called short-period and originate from the Kuiper Belt in our solar system. What is this celestial body called?
Answer:
Comets
Explanation:
Explain with scientific reason that origin of life was associated with some chemical reactions.
Answer:
Darwin's theory of biological evolution tells us that all life on earth may have originated from a single, relatively simple reproducing creature living in the distant past. This idea is based on many observations, one of which is that when living things reproduce, children are often born with random new traits.
Explanation:
An ecosystem includes only biotic factors.
A. True
B. False
Answer:
False
Explanation:
It includes living and nonliving things
Answer:
false
Explanation:
it includes both biotic and abiotic factors
Which of the following is not true concerning the flow of energy through an ecosystem?
a. Most solar energy is used in photosynthesis.
b. Photosynthesis and cellular respiration are performed by plants.
Not all solar energy is used for photosynthesis.
d. Most of the energy from photosynthesis flows out as heat.
C.
Please select the best answer from the choices provided
Ο Α
OB
С
D
Answer: i believe it is not all solar energy is used for photosynthesis
Explanation:
The following is not true concerning the flow of energy through an ecosystem: "Not all solar energy is used for photosynthesis," which is in Option C, as most of the solar energy that reaches the earth is captured by plants through photosynthesis.
What is the energy flow through ecosystems?Energy flows through ecosystems in a one-way direction, from the sun to producers (such as plants) and then to consumers (such as animals). The energy that drives this flow is primarily provided by the sun, which emits solar radiation that is absorbed by plants and other photosynthetic organisms. During photosynthesis, plants use the energy from sunlight to convert carbon dioxide and water into glucose (a sugar) and oxygen. This process captures some of the solar energy and stores it in the chemical bonds of glucose, which can then be used as a source of energy by the plant itself and by other organisms that consume the plant.
Hence, the following is not true concerning the flow of energy through an ecosystem: "Not all solar energy is used for photosynthesis," which is in Option C.
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Use the drop-down menus to complete the statements.
When ammonia was waved at the
end, the earthworms reacted by quickly pulling back from the odor.
When ammonia was waved at the
vend, the earthworms showed no reaction or change in behavior.
Answer: 1 is anterior and 2 is posterior
Explanation:
edge 2021
Answer:
edge
Explanation:
1 anterior
2 posterior
What caused the oxygen levels in Earth’s atmosphere to increase during the Precambrian time? Choose the correct answer.
Land plants evolved and released oxygen as they grew.
The chemical weathering of granite released large quantities of oxygen.
Oxygen dissolved in the ocean was released by osmosis into the atmosphere.
Cyanobacteria consumed carbon dioxide and released oxygen as a waste product.
The Precambrian era is said to have taken place during the early years of our planet. During this time, the levels of oxygen in the atmosphere were much greater than they are today.
This level of increased oxygen in the atmosphere is a direct result of the biological processes and the sheer number of certain organisms present in Precambrian-era oceans.
Though the options stated all depict ways in which oxygen entered the atmosphere during the Precambrian era, the increase of oxygen levels is credited to the cyanobacteria.
The cyanobacteria were among the few living organisms present on the Earth during this time. They are small algae that use photosynthesis to sustain themselves.
Photosynthesis is known to produce and release oxygen as a waste product. This and the vast number of cyanobacteria present at the time account for the increase in oxygen levels during this era.
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PLEASE HELP ME ON BOTH QUESTIONS ASAP STOP SCAMMING ME!!!!!
Answer:
1.b
2.a
3.c
QUESTION #6: A
Explanation:
Hope this helps!
Answer:
A. Stores large quantities of water internally. This will enable the organism to survive drought and keeps the organism hydrated. Eg. Lettuce
How do the two groups of peripheral nerves differ?
Answer: The central nervous system includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs.
Explanation:
most serious plant - pathogen belongs to ?
Answer:
I believe the answer is fungi
Explanation:
It causes most plant sicknesses.
Where does natural variation in a population come from? *
1.mutation
2.crossing over
3.sexual reproduction
4.independent assortment
5.natural variation comes form all of these
Explanation:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Answer:
The answer is Mutation.
Explanation:
Do your experiments suggest that mushrooms are decomposers (organisms that break organic matter down to simpler, inorganic matter)? Explain.
Answer:
Explanation:
As we know mushrooms help to decompose dead organisms, and it helps breaks down dead plants and or, dead animals so yes I would suggest that mushrooms are decomposers.
Mushrooms are decomposers because they are capable of breaking down dead and decaying organic matter into simpler and inorganic matter to synthesize their own food.
What are the advantages of Decomposers?Decomposers are only living forms that are capable of converting organic matter into inorganic one which is easily consumed by the roots of plants for their metabolism.
Mushrooms form a web of mycelium that expands deep into the soil to decompose dead organic matter with the help of their unique enzymes.
It also plays a key role in nutrient recycling and makes nutrients available to plants in inorganic forms.
Therefore, it is well described above.
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The hypothesis would not have been supported
by the data if...
A. traits independently assorted in
approximately a 9:3:3:1 ratio.
B. the traits for white fur and red eyes were
always inherited together.
C. all the F1 offspring had the same phenotype.
Answer: B
the traits for white fur and red eyes were always inherited together.
Explanation:
The hypothesis would not have been supported by the data if the traits for white fur and red eyes were always inherited together by the law of independent Assortment.
What is law of independent Assortment?The law of independent assortment selects alleles of two extra genes into gametes independently of each other.The allele acquired for one gene is unrelated to the allele obtained for another.Mendel's experiment constantly shown that the progeny's distinctive combinations are always unique from their parents'.He formulated the Law of Independent Assortment on this premise.So we can conclude that as the qualities for white fur and red eyes are not usually inherited together, we may deduce that the two features are regulated by distinct genes and are independently shown in the person, as stated by the law of independent Assortment.
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please answer this within the hour
1 1.3.1 Test (CST): Introduction to AP Environmental Science
Question 2 of 25
Which of these is a type of organic matter found in plants?
A. Oxygen
B. Water
C. Carbon dioxide
D. Sugar
When comparing data between two different groups,
A.
the middles of the data sets and the spreads around them should both be considered.
B.
the most frequently occurring values and the middle values should both be removed from the data sets.
C.
only the highest and lowest values of the data sets should be considered.
D.
only the average values of the data sets should be considered.
Answer: A. the middles of the data sets and the spreads around them should both be considered.
Explanation:
When comparing data from two different groups, the most frequently occurring values should not be removed because they are most representative of the data and so will be very important in comparing the data.
The highest and the lowest values should not be the only data considered, indeed those should be the of lower importance than the values in the middles as the highest and lowest can sometimes be outliers.
Averages are good for summaries but shouldn't be the only things considered. The correct answer is therefore the first option that the middles and the spreads around the middle should be considered as these are more indicative of the groups.
Answer:
i got it right in study island
Explanation:
Which parental genotypes below would result in children who are all normal-vision daughters and all colorblind sons?
(XB-allele for normal color vision)
(Xb-allele for colorblindness)
A) xBxb and xBy
B) xBxb and Xby
C) xbxband XBy
D) xbxb and Xby
Answer:
Good morning ,
I have a question , what's does the Y stands for !
What are the benefits of Renewable Energy?
Answer:
Benefits of Renewable Energy
Generating energy that produces no greenhouse gas emissions from fossil fuels and reduces some types of air pollution.
Diversifying energy supply and reducing dependence on imported fuels.
Creating economic development and jobs in manufacturing, installation, and more.
Explanation:
please help
1. what is a general preventative measure that ensure that pigs are not infested with worms ?
2. what are tbe external parasites that can affect pigs ?
3. what are two control measure that can be applied for external Parasites ?
Answer:
your a parasite.
Explanation:
you didn't give the question to go with the answers
Which organisms does the rabbit eat ?
Answer:
Plants /producers
Explanation:
Hope this helps and have a great day!!!!
Answer:
plants,broccoli,Brussels sprouts,seeds,roots etc.
Explanation:
I hope it will help u
Two species of three-spined stickleback fish have been found together in five different lakes. The larger, bottom-dwelling species feeds on large prey close to shore. A surface-dwelling species feeds on small plankton in open water. DNA analysis shows that the two species in each lake are more closely related to each other than they are to any of the other species in the lake. Which prezygotic mechanism most likely allowed divergence of an ancestral species into these present-day species
Answer:
The answer is "Sympatric speciation due to disruptive selection"
Explanation:
Disruptive selection is a certain type of natural choice, that aggressively favors all ends of the spectrum in a moderate community. Disruptive selection is often deduced by a phyletic prepared to change to contribute to speciation. These two species happened due to various habitats associated with extreme speciation due to various confusing choices.
AO3 – Analyse using table 1 the distribution of blood to the working muscles and other organs at rest and during exercise (4 marks)
Answer:
When at rest, most blood flows to other organs. But during exercise, most blood flows to the working muscles.
Why do astronauts need to be concerned about EM waves in outer space?
5. If the ecologist was being lazy and only
sampled the flowers near the road (Row J).
What would his estimate of the entire field be
based on Row J data? (Show work.)
Answer:
his estimate would be low
Explanation:
His estimate would be low because row j has a much lower flower count then the other rows leading to what would most likely a low count
According to the results for Patient 1 shown above, which antigens were present in Patient 1’s blood? Check all (if any) that apply.
A antigen
B antigen
Rh antigen
The fisted answer is (B)
Patient 1 has Type ___ blood.
Answer:
A.
Explanation:
Patient 1 has Type A blood because agglutination occurs due to reaction with anti-B. We know that A blood group has antigen A and it is anti-B means that they attack on B type of blood cells while on the other hand, B blood group has antigen B and it is anti-A means that they will attack on the A type blood cells upon mixing. So according to the chart, there is nothing happens by reaction of the blood with anti-A whereas agglutination occur by reaction with anti-B so we can say that the patient has type A blood.
Answer:
B-
Explanation: Just took the assignment.
define evolution as clearly and completely as you can
How might the loss of sea ice affect people, animals, or ecosystems?
(Marking as Brainliest for correct answer)
Answer:
The Global Impacts of Arctic Sea Ice Loss. Some of the most important climate news this winter has been around the alarming lack of sea ice in the Arctic, which has been in decline due to the steady rise in Earth’s average air and ocean temperatures. While suffering polar bears are a poignant symbol of climate change, the effects of disappearing ice extend far beyond the Arctic circle and its inhabitants.
Explanation:
I remember reading and doing a project for this question
what is the significance of pH?
True or False? Organ systems work in isolation and do not work with other organ systems.
