The maintenance of a self-sustaining ecosystem requires a
A.soil that is acidic
B.constant temperature
C.greater numberof herbivores than producers
D.cycling of materials between organisms and their environment

Answers

Answer 1
D. Cycling of materials between organisms and their environment.

Related Questions

contains the ovary, which contains the ovules where the
cells are
The
produced.

Answers

Answer:

Flowers not only look pretty but, in fact, are important in making seeds. Flowers have some basic parts. The female part is the pistil. The pistil usually is located in the center of the flower and is made up of three parts: the stigma, style, and ovary. The stigma is the sticky knob at the top of the pistil. It is attached to the long, tubelike structure called the style. The style leads to the ovary that contains the female egg cells called ovules.

Which of the following is a true statement about mitosis and meiosis?
Group of answer choices

A.Mitosis produces haploid cells, but meiosis produces polypoidy cells.

B.Mitosis produces haploid cells, but meiosis produces diploid cells.

C.Mitosis produces diploid cells, but meiosis produces haploid cells.

D.Mitosis produces monoploid cells, but meiosis produces haploid cells.

Answers

Answer:

C. Mitosis produces diploid cells, but meiosis produces haploid cells.

Explanation:

Mitosis produces 2 diploid cells that are identical to each other, and meiosis produces four haploid gametes (sex cells) that are different from one another.

A system releases 7.9kj of heat while 6.5kj work is done on it. Calculate

Answers

Question:

A system releases 7.9kj of heat while 6.5kj work is done on it. Calculate the total change in internal energy during these operations in kJ.

Answer:

14.4kJ

Explanation:

The first law of thermodynamics which states that the total change in internal energy (ΔU) of a system is the sum of the total heat (Q) released by the system to its surroundings and the total work done (W) on the system by its surrounding, can be expressed mathematically as follows:

ΔU = Q + W      -------------------(i)

From the question;

Q = 7.9kJ

W = 6.5kJ

Substitute these values into equation(i) as follows;

ΔU = 7.9kJ + 6.5kJ

ΔU = 14.4kJ

Therefore, the change in internal energy is 14.4kJ

Which of the following terms signals the reader that
one event or factor caused another?
A. Meanwhile
B. In order to
C. Finally
D. Hence
SUBMIT

Answers

A.. hopefully i’m right

What is the process by which individuals that are better adapted to their environment survive and reproduce more successfully than others do?

Answers

Natural selection is the process by which some organisms are better adapted than others and survive and reproduce more successfully

this is not biology by the way its Science.
Question:Low viscosity lava is?
a.less runny.
b.more runny.
c.of more density.
d.of less density.

Please Help Me Figure it Out

Answers

Answer:

b

Explanation:

[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]

d. of less density

I'm quite sure it correct...

Tell in your own words:

Why is it called a Solar System?

Answers

it’s called a solar system because solar means “relating to or determined by the sun” and system means “a set of things working together as parts of a mechanism or an interconnecting network” and the solar system is a whole bunch of planets and other things that are related to the sun and working together.

Which of the following cell components are most involved in determining an organisms traits

Answers

Answer:

chromosomes because they carry the DNA.

Explanation:

She is confident, her idea is strong and connective  Her voice is clear and enough for listening

Answers

Answer:

Explanation:

This should be you lol

What is responsible for speeding up reactions in your body? (choose all that apply)
A. substrates

B. proteins

C. enzymes

Answers

Answer:

C

Explanation:

enzymes are catalytic protein that speed up reactions in the body

Activity 2: Compare and contrast a fungus and a plant.
Saccharomyces cerevisiac
Species
Tillandsia fasciculata
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species

Answers

Answer:

Because of the gravity of the earth and its existence is a continuous point of the gravity of the earth and its existence is a continuous point of the gravity of the gravity of the gravity of the gravity of the gravity of the gravity of the gravity of its nature as a matter is a continuous improvement from our current property management policy

Explanation:

Uv6 fd t xr r r the following questions below are the differences between literary non-fiction text and the first one

WILL GIVE BRAINLIEST IF CORRECT
At one time, farmers had to spray insecticides on their fields to protect their crops from insects. Today, farmers can buy seeds that produce plants that are resistant to many insects. Which process contributed to the development of these seeds?
a. Cloning
b. Artificial Selection
c. Genetic Engineering
d. Asexual Reproduction

Answers

Answer:

C

Explanation:

Genetic Engineering is the largest contributor, but there's an argument to be made for artificial selection.

Answer:

The Answer Is C!!

Explanation:

once again, wassup yostos from bms Mrs hees 4th pd

During ______, the gravitational forces of the sun and moon pull on the Earth from the same direction, or opposite dire

Answers

Answer:

Spring Tides.

Explanation:

Tides can be defined as the rise and fall of water level in water bodies such as lakes and oceans due to the gravitational force of attraction exerted by the moon on earth. The side closest to the moon creates a bulge of water known as high tide. Low tides are generally experienced when a sea level is not within the bulge.

Generally, the gravitational pull of the Moon cause visible changes on planet Earth's surface.

This ultimately implies that, the pull of the Moon's gravity causes high and low tides on planet Earth's surface.

The various types of ocean tides based on the position of the Earth, Moon and the Sun are;

I. Neap tides.

II. Spring tides.

III. Low tide.

IV. High tide.

V. Brown tide.

VI. Rip tide.

VII. Red tide.

20. The five recognized periods of mass extinction have- *


Answers

Answer:

1. Ordovician Mass Extinction (about 44o million years ago)

2. Devonian Mass Extinction (about 375 million years ago)

3. Permian Mass Extinction (about 250 million years ago)

4. Triassic-Jurassic Mass Extinction (about 200 million years ago)

5. Cretaceous-Tertiary Mass Extinction (about 65 million years ago)

Explanation:

state two differences between tastic and nastic movement in plants​

Answers

Answer:

Explanation:

Tactic movement;

Movement is directly towards/away from stimulus

Stimuli consist of light/heat/chemical

Nastic movement;

non-directional movement

stimulus is touch/tugor pressure.

Explanation:

1.Movement is directly towards/away from stimulus

2.Stimuli consist of light/heat/chemical

for tastic movement

I NEEEEDDD HELP PLEASE

Answers

Answer:

Digestive, excretory, circulatory, lymphatic, respiratory

Explanation:

digestive is your stomach

excretory is your colon

circulatory is your heart

lymphatic is your white blood cells and others

respiratory is your lungs

I'll go more in-depth in the comments but I think you need answers now

DNA: TTCGCTTTCT mRNA: Amino acid:

Answers

Answer:

mRNA: AAGCGAAAGA

Explanation:

amino acid: lysine , arginine

In order for a neuron to receive and transmit a message it must be in a polarized state. While in this rest state there are more sodium ions outside the cell membrane while potassium is prevalent inside the cell. This causes the neuron to maintain a neutral charge. Once the action potential arrives at its [ Select ] , a nerve cell will shuttle the message down its own axon and to the next neuron via its [ Select ] . This impulse will cause the cell to become [ Select ] and will effectively change the charge of the neuron to a [ Select ] charge. After sodium rushes into the cell, the potassium will rush out in order to [ Select ] . Once the impulse reaches the axon terminal, it is [ Select ] that stimulates a [ Select ] to continue the message to the next neuron. The neuron then undergoes a [ Select ] when all ions are repositioned with help of the

Answers

Answer:

The process of nerve impulse transmission by means of an action potential involves the processes of depolarization, repolarization, hyperpolarization and restoration of resting memebrane potential.

Explanation:

In order for a neuron to receive and transmit a message it must be in a polarized state. While in this rest state there are more sodium ions outside the cell membrane while potassium is prevalent inside the cell. This causes the neuron to maintain a neutral charge. Once the action potential arrives at its dendrites, a nerve cell will shuttle the message down its own axon and to the next neuron via its axon terminal. This impulse will cause the cell to become depolarized and will effectively change the charge of the neuron to a poositive charge. After sodium rushes into the cell, the potassium will rush out in order to restore its resting memebrane potential. Once the impulse reaches the axon terminal, it is used to open voltage- gated calcium channels releasing calcium ions that stimulates a neurotransmitter to continue the message to the next neuron. The neuron then undergoes a repolarisation when all ions are repositioned with help of the voltage-gated ion channels.

Please help me. no links I will report you
Please answer fast for the 20 points.

Answers

Answer:

Request a refund for recent purchases · It's less than 48 hours since you bought an app or made an in-app purchase,

Answer:

D. several million years

Explanation:

find the velocity of the spacecraft:

6 ÷ 2 = 3 AU per year

the time for the spacecraft to travel to Wolf 359:

492,000,000 ÷ 3 = 164,000,000 = several million years

Which best describes an experiment?
In a lab a scientist measures the height of roses that received different fertilizers.
A scientist measures the speed at which a cheetah travels while it is hunting.
A scientist measures the rate at which a population of wild geese reproduces.
A scientist measures the width of a certain type of maple leaf throughout a forest.

Answers

A: In a lab a scientist measures the height of roses that received different fertilizers.

An experiment must include variables. The other three are just measurements, but since the scientist is varying the types of fertilizers used, this better describes an experiment. It is also done in a controlled environment (in a lab) which helps to eliminate other uncertainties.

Look at image please

Answers

Answer:

This is easy: 2 Hydrogen and 1 Oxygen!

Explanation:

H20 means 2 H and 1 O

Answer:

Explanation:

please help its urgent. 100 points

Answers

Answer:

1. Watson and Crick

2. Franklin and Wilkins

3. amount of base pairs

4. double helix

5. pyrimidine

6. purine

7. replication

8. DNA polymerases

9. nitrogen base

10. five-carbon sugar

11. phosphate group

Explanation:

I hope this was helpful, good luck!

1. Watson and Crick

2. Franklin and Wilkins

3. amount of base pairs

4. double helix

5. pyrimidine

6. purine

7. replication

8. DNA polymerases

9. nitrogen base

10. five-carbon sugar

11. phosphate group

What 3 ions does a muscle have to be missing to create muscle fatigue?

Answers

Answer:

nerves, muscle tissue,

good morning.
what is photosynthesis? ​

Answers

Answer:

is the process by which plants use sunlight water and carbon dioxide to create oxygen and energy in form of sugar

Humans are in the group of living organisms that has the highest percentage of
species.

A. True
B. False

Thank you!

Answers

Answer:

The answer would be B. False.

Explanation:

Insects actually have moe than 1 million species, and that's only the ones that have been discovered so far, so that means it's false to say humans have the most.

can someone help me plzzzz

Answers

Answer:

D I studied it in geography

How long does it take a 100.0 g sample of As-81 to decay to 6.25g?

How long does it take a180 g sample of Au-198 to decay to 1/8 its original mass?

What is the half-life of a radioactive isotope if a 500 g sample decays to 62.5g in 24.3 hours?

How old is a bone if it presently contains 0.3125 g of C-14, but it was estimated to have originally contained 80.0 g of C-14?

Thallium-208 has a half-life of 3.053 minutes. How long will it take for 120.0 grams to decay to 7.50 grams?

Answers

Answer:

1. Total Time: (34s)*(4) = 132s

2. 2.69 days

3. 8.10 hours

4. 5730 years*8 half lives = 45,840 years

5. 12.21

Construct an argument based on data about the risks and benefits of renewable and nonrenewable energy resources.
Argument should consist of at least 100 words.

Answers

There are two major categories of energy: renewable and non-renewable.

Non-renewable energy resources are available in limited supplies, usually because they take a long time to replenish. The advantage of these non-renewable resources is that power plants that use them are able to produce more power on demand. The non-renewable energy resources are:

Coal
Nuclear
Oil
Natural gas
Renewable resources, on the other hand, replenish themselves. The five major renewable energy resources are:

Solar
Wind
Water, also called hydro
Biomass, or organic material from plants and animals
Geothermal, which is naturally occurring heat from the earth
While renewable energy resources have the advantage of unlimited supply over the long haul, they are limited in their availability at any given moment.

For example, the sun rises each day, but its ability to generate power is limited when its cloudy. Another disadvantage is that power plant operators can’t crank up renewable energy production when people are consuming more power, such as on a hot day when many people are running air conditioners at the same time.

States like California are trying to solve this problem by using energy storage, like large batteries, to collect electricity from renewable sources when demand is low in order to use it later when demand goes up. Non-renewable Energy and Climate Change

When coal, natural gas and oil are burned to produce energy, they emit heat-trapping gases such as carbon dioxide. This process of trapping heat is what drives climate change, and the failure to address this problem is what's catalyzing the current climate crisis.

Fossil fuels are hydrocarbon-containing materials like coal or gas that are found in the Earth’s crust and formed in the geological past from the remains of living organisms. These energy sources account for the majority of the world’s greenhouse gas emissions.

If emissions continue unrestrained, the atmosphere could warm by as much as 2.7 degrees Fahrenheit above preindustrial levels by the year 2040, according to the latest report from the Intergovernmental Panel on Climate Change, a group of international scientists empowered by the United Nations to advise world leaders.

Scientists say this increase in the temperature would threaten life on the planet in a myriad of ways, including severe water shortages; more air pollution; rising sea levels, habitat loss; heat waves; melting ice sheets in West Antarctica and Greenland; and destruction of the world’s coral reefs.

Over the last 150 years, humans are responsible for the vast majority of the increase of these gases in the atmosphere, and the burning of fossil fuels through activities like driving a car is the largest source of these emissions.

There is a vocal group of environmentalists and researchers —Stanford’s Mark Jacobson, who developed a state-by-state 100% renewable plan for one — who argue that the power grid should be supported only by renewable resources.

Policy makers who invest in renewable energy often do so with the goal of generating power without emitting these planet-warming gases. Hope this helps!

What is a nebula?

the core of a massive star
a cloud of gas and dust in space
a swirling disk with a lot of gravity
the debris remaining after a supernova

Answers

A nebula can be defined as: B. a cloud of gas and dust in space.

What is a nebula?

A nebula can be defined as a cloud of gas and dust in space.

This ultimately implies that, a nebula is a low-density cloud of interstellar hot gas and dust such as:

HeliumHydrogen

Basically, a nebula is needed for the creation or formation of a star as follows:

An increase in the temperature at the center of a nebula causes the small nuclei of atoms to fuse.The nebula gets hotter and brighter as the nuclear fusion sets off a chain reaction while providing enough energy to turn the nebula into a star.

Read more on nebula here: https://brainly.com/question/19530940

what is the water intake of gymnosperms​

Answers

Answer:

Check down

Explanation:

Gymnosperms, like angiosperms (the flowering plants), differ from seedless plants (like mosses and ferns) in not requiring water for sperm to swim in to reach the egg. This means that the movement of pollen (male gamete) to ovule (female gamete) in seed plants relies on airborne transport, not water transport.

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