Why is it important to monitor the amount of nutrient available in freshwater ecosystems?
a
Too little nutrients available will limit the amount of producers and lead to smaller food chains
Too much nutrient available can lead to eutrophication and damage the ecosystem
Oь
A & B are both correct
d
None of the above are correct

Answer:is true that identical twins share their DNA code with each other. This is because identical twins were formed from the exact same sperm and egg from their father and mother. (In contrast, fraternal twins are formed from two different sperm and two different eggs.)

Our father has different dna from your mother so yes

Answer:

Drinking alcohol during pregnancy can cause a serious condition that can affect a child throughout life called fetal alcohol syndrome (FAS).

Explanation:

When a pregnant woman drinks alcohol it's passed to the baby through the bloodstream.

Answer:

Hydrogen bonding

Explanation:

Hydrogen bonds between surface water molecules resist being stretched.

Cohesion, surface tension, and adhesion are the properties of water molecules that are all a result of hydrogen bonding.

Hydrogen bonding is a transient intermolecular force caused by the electrical attraction between partially positive hydrogen atoms and partially negative F, O, or N atoms.

Thus, the correct answer is - are all a result of hydrogen bonding.

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Answer:

1) An electrical impulse travels along an axon of the presynaptic neuron.

2) When the impulse reaches the nerve-ending, it releases chemical messengers called neurotransmitters.

3) These chemicals diffuse across the synapse and bind with specific receptor molecules on the membrane of the next neuron.

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Pls brainliest...

The correct option is number 4), since this option considers the probability of couple gametes without A/B from both parents (that is, -i- gametes). This option could generate a genotype -ii- which will be O type.

A logistic growth model is most appropriate for expanding squirrel populations to new islands.

A logistic growth model is one that incorporates carrying capacity to show how growth slows when a population reaches a point where the amount of resources is limited. As the population grows, the organism's population reaches the carrying capacity and stays there. This is the maximum population the environment can support.

Population grows more slowly as it approaches carrying capacity (K), or the maximum population that the surrounding area can support according to the population logistic model. According to this declaration, all members of the population have equal access to resources and chances of survival.

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Answer:

Structure and Function. In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.

Organs are groups of tissues that work together to perform a particular body function. Tissues and organs are specialized for particular body functions.

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Photosynthesis:

Inputs Outputs

Number of C atoms 6

Number of H atoms 12

Number of O atoms 18

Energy-carrying molecules Light energy

Cellular respiration:

Inputs Outputs

Number of C atoms 6

Number of H atoms 12

Number of O atoms 6

Energy-carrying molecules Adenosine triphosphate (ATP)

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The three correct answers are:

B. The chlorophyll in the leaves break down, revealing yellow and red pigments that had been masked by the green pigments. This process leads to the beautiful fall foliage colors observed in maple trees. As the weather gets colder, the breakdown of chlorophyll exposes the underlying pigments, creating vibrant red, orange, and yellow leaves.

C. Xylem and phloem fill with ions and organic substances that prevent freezing. In response to increasing cold weather, the tree transports ions and organic compounds into the xylem and phloem. These substances act as antifreeze agents, preventing the freezing of sap and ensuring the circulation of nutrients and water within the tree.

D. Meristems form thick scales to protect next year's buds from cold winter temperatures. The meristems, which are the regions of the tree where new growth occurs, undergo changes in response to the approaching cold weather. They form protective scales around next year's buds to shield them from the harsh winter conditions, ensuring their survival and future growth.

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Your question is incomplete, but most probably your full question was:

Which of the following occur in a maple tree growing in a temperate climate in response to increasing cold weather? Choose three correct

answers.

A. Auxin production stimulate one final growth spurt before winter arrives,

B. The chlorophyll in the leaves break down, revealing yellow and red pigments that had been masked by the green pigments.

C. Xylem and phloem fill with ions and organic substances that prevent freezing.

D. Meristems form thick scales to protect next year's buds from cold winter temperatures,

Answer:

11,400 years old

Explanation:

The total  number of atoms present at the beginning = number of C-14 + number of N-14 atoms.

Hence;

1500 + 500 = 2000 atoms = No

At time t, N = 500 atoms of C-14 remains

Since the half life of C-14 (t1/2) = 5700 years

N/No = (1/2)^t/t1/2

500/2000 =  (1/2)^t/5700

1/4 = (1/2)^t/5700

(1/2)^2 =(1/2)^t/5700

2 = t/5700

t = 2 * 5700

t = 11,400 years old

I had to take pic to answer.Sorry.

Answer:

Dorsal nerve cord and notochord: in all seven species • Paired appendages and spinal column: in all species except lamprey • Paired legs: in all species except lamprey and tuna • Amnion: in all species except lamprey, tuna, and bullfrogs • Mammary glands: in kangaroo, rhesus monkeys, and humans only • Placenta: in ...

The notochord provides skeletal support, gives the phylum its name, and develops into the vertebral column in vertebrates. The dorsal hollow nerve cord develops into the central nervous system: the brain and spine.

The dorsal nerve cord is a hollow dorsal cord. It consists of a part of the exfoliated coagulant, forming a hollow tube, compared to other animal species that have solid abdominal tubes. The dorsal nerve cord later changes in vertebrates to the central nervous system, which consists of the brain and spinal cord.Oct 11, 2018

Explanation:

Answer:

The Correct awnser is D

Explanation:

Earth has 75% of our space is made up of water and most of it comes from our ocean.

The scientific interpretation of the fossils found in the cradle of humankind,

The Cradle of Humankind region comprises 15 major fossil sites, some of which date back 5-million years.

The name Cradle of Humankind reflects the fact that the site has produced a substantially large number of hominin fossils, some the oldest ever found, dating as far back as 3.5 million years ago.

The Cradle of Humankind Site comprises a strip of a dozen dolomitic limestone caves including the fossilized remains of ancient forms of animals, plants and most notably, hominids. The dolomite in which the caves formed, started out as coral reefs flourishing in a worm shallow sea about 2.3 billion years ago.

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From this cross of individuals that are heterozygous for a particular trait, the expected genotypic ratio of the F1 generation would be 1 AA: 2 Aa: 1 aa. The expected phenotypic ratio would be 3 individuals with the dominant trait (A_) to 1 individual with the recessive trait (aa).

Consider a cross between two individuals that are heterozygous for a particular trait.

Let A represent the dominant allele and a represent the recessive allele.

The genotypes of the parent generation (P generation) are Aa × Aa.

Punnett square for this cross:

       |  A   |   a   |

-------|------|------|

  A   |  AA  |   Aa  |

-------|------|------|

  a   |  Aa  |   aa  |

-------|------|------|

The Punnett square shows the possible combinations of alleles from the parent generation and predicts the genotypes and phenotypes of the offspring in the F1 generation.

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The stages of bee development are egg, larva, pupa, and adult. Eggs hatch into larvae, which then transform into pupae. Finally, adult bees emerge and undergo further maturation.

The stages of bee development are:

1. Egg: The bee life cycle begins when the queen bee lays an egg in a honeycomb cell.

2. Larva: The egg hatches into a larva, which is a legless, grub-like creature. The larva is fed a special diet called royal jelly, which stimulates its growth.

3. Pupa: The larva undergoes metamorphosis and transforms into a pupa. Inside the sealed cell, the pupa undergoes various changes, developing into an adult bee.

4. Adult Bee: After completing the pupal stage, the fully developed adult bee emerges from the cell. The bee then undergoes further maturation, such as its exoskeleton hardening, wings expanding, and adult coloration appearing.

It's important to note that there are three castes of bees: queen, worker, and drone. The development process for each caste is similar, but the diet and size of the cells they are raised in differ, leading to their distinct roles within the colony.

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Answer: A is the correct answer.

because for the treatment of one type of diabetes insulin should be provided but isolation of insulin and production is so costly.

but as DNA recombination has developed we can use bacterial replication system to produce insulin. they replicate very fast so large amount of insulin will be produced and then it can isolated.

but we also know that insulin of bacteria needs some modification before it can be used in human.

if want more info ask here. hope it helps.

Answer:

The pelvic bones of whales are “one of the classic examples of a vestigial structure

Explanation:

took the test:)

Answer:

vestigial structure

Explanation:

i just finished the quiz

The correct answer is 2. Our bodies produce a lot of CO₂ and water as waste and that it needs to get rid of through breathing.

Breathing is necessary to bring oxygen into our bodies and remove carbon dioxide, which is a waste product of cellular respiration. When we eat food, it undergoes a process called cellular respiration, which releases energy in the form of ATP. This process requires oxygen and produces carbon dioxide as a waste product.

While we can store energy from food for later use, we cannot store oxygen or remove carbon dioxide from our bodies without breathing. Therefore, we need to breathe constantly to maintain the supply of oxygen and remove the waste carbon dioxide. In contrast, we can eat a few times a day because our bodies can store excess food energy as fat for later use.

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1. We can see here that the difference between pulmonary circulation and systematic circulation:

Pulmonary circulation is the circulation of blood from the heart to the lungs and back to the heart. While systemic circulation is the circulation of blood from the heart to the rest of the body and back to the heart.

2. Aerobic respiration is a type of respiration that requires oxygen. While anaerobic respiration is a type of respiration that does not require oxygen.

3. The importance of ATP is that it is used to power all of the body's cells, including muscle cells, brain cells, and heart cells.

4. The group blood lack of atigen and antibody:

Blood group   Antibodies        Antigens

A                                Anti-B            A

B                                Anti-A                  B

AB                                None         A and B

5. The left ventricle is thicker than the right ventricle because it has to pump blood to a larger area of the body.

6. The difference between disinfectants and antiseptics is that:

Disinfectants kill microorganisms on surfaces, while antiseptics kill microorganisms on living tissue.

7. The life cycle of a tapeworm begins when an infected animal sheds tapeworm eggs in its feces. If a human ingests these eggs, they hatch in the small intestine and the larvae burrow through the intestinal wall and travel to the liver, lungs, or brain. In these organs, the larvae mature into adult tapeworms.

8. The main differences between cholera and typhoid are:

9. The genus name for H0mo sapiens is H0mo and the species name is sapiens.

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Calcium is a chemical element of the periodic table which has the atomic mass of 40 and atomic number of 20. It is a cation when present in the ionized form. Thus, the correct option is B.

An ion can be defined as a chemical species which holds a charge that may be positive or negative of some magnitude. The term ion can be used to refer to the atoms or molecules which have non-zero net charges associated with them.

Cations are the ions which are positively charged. And, anions are the ions which are negatively charged. Ions are the charged atoms or molecules. If a balanced atom loses or gains one or more electrons, then it will become a positively charged cation and a negatively charged anion, respectively.

Therefore, the correct option is B.

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The villi of the small intestine use active transport to take up nutrients after concentration has reached equilibrium.

Active transport may be defined as the process that occurs against the concentration gradient and is mediated by carrier proteins. Metabolic energy is used to move ions or molecules against a concentration gradient.

During the process of digestion, the villi in the small intestine enthrall the soluble nutrients gradually. Over time, the concentration of nutrients in the villi acquires an equilibrium with the concentration in the gut. Until here, the nutrient uptake is carried by the process of passive diffusion.

But after attaining the equilibrium, the nutrient uptake is carried by the process of active transport.

The complete question is as follows:

What part of the body uses active transport to take up nutrients after concentration has reached equilibrium?

Therefore, the correct option for this question is C, i.e. small intestine.

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Answer:

Rainforest wildlife species would be affected, and forests would be made up of different tree communities.

Explanation:

I don't know if its correct answer, but Good luck

And sorry if its wrong

Answer:

d. all of these

Explanation:

because of course scientists needs

experiments, observation and as well

as object measurements while inventing

some new objects.

Answer:the first one

Explanation:

Answer: A

Explanation: I just did it EDG 2021

Answer:

Catalysts are integral in making plastics and many other manufactured items. Even the human body runs on catalysts. Many proteins in your body are actually catalysts called enzymes, which do everything from creating signals that move your limbs to helping digest your food. They are truly a fundamental part of life.

Answer:

DNA methylation is the answer

Answer:

pegmatitic texture is the correct answer

Answer:

were - were

Explanation:

Answer:

yes

Explanation:

look at the link I gave you :)

Answer:

A scientific theory can come from observations, experiments, and evidence gathered through research. It is a well-substantiated explanation of some aspect of the natural world based on empirical evidence and has been repeatedly tested and confirmed through observations and experiments. The scientific method is typically used to develop and test scientific theories. It involves making observations, asking questions, formulating hypotheses, testing them through experiments, and analyzing the results to conclude.

Explanation:

A scientific theory can come from observations, experiments, and data analysis. It is based on a body of evidence and has predictive power.

A scientific theory can come from observations, experiments, and data analysis. It is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence. Theories in science are supported by empirical evidence and have predictive power.

For example, the theory of evolution in biology is supported by evidence from the fossil record, genetics, comparative anatomy, and other fields. It explains the diversity of life on Earth and makes predictions about the relationships between different species.

In physics, the theory of relativity explains the relationship between space, time, and gravity. It has been tested through experiments and observations, demonstrating its accuracy.

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