Biology Middle School

How does the heart keep the blood flowing throughout the body?
A: It contracts and relaxes
B: It inflates and deflates
C: It inhales and exhales
D: It opens and closes

Answers

Answer 1
It contracts and relaxes!

Hope this helped u!!

Related Questions

Climate describes the weather of an area over a long period of time and is determined by the temperature and precipitation of the area. The sun also affects the climate. In the space below, explain how the sun’s energy affects the climate of an area.

Answers

Answer:

the sun's energy affects the climate of an area In many ways. the sun's energy in a climate is like the boss in an office. the sun's energy determines the temperature, the humidity, and how much vegetation will grow.

Can someone answer these? :(((

Answers

Answer:

4. Proteins

Explanation:

Please help me, it's really important, I would really appreciate it! No links please, just the correct answer!

Answers

Answer:

In the Explanation

Explanation:

Asteroid and Comets:

      While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds. When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.

Planets and dwarf planets:

    The main difference between a dwarf planet and a planet is size. Because they are smaller, dwarf planets lack the gravitational forces needed to pull in and accumulate all of the material found in their orbits.

Inner Planets and Outer Planets

  Inner planets are the closest 4 planet to the Sun in the solar system. They are mostly made of rocks(Mercury, Venus, Earth, and Mars.) Outer Planets are the 4 planets that are the most far away from the Sun. They are mostly made up of ice, and gas (Jupiter, Saturn ,Uranus and Neptune.)

Earth and Venus

While Venus and Earth have similar sizes and are solar system neighbors, they have evolved very differently. Venus today lacks oceans, appears to lack plate tectonics, and has a massive carbon dioxide atmosphere that creates a greenhouse effect that makes the surface a hot hell.

Answer:Not sure

Explanation: if you have to look it up should be on there for you

Which of the following body parts has striped muscles?

a
Bladder

b
Heart

c
Intestine

d
Stomach

Answers

Answer:

heart

Explanation:

Easy claps

Answer:

The heart

Explanation:

Striated muscle tissue is a muscle tissue that features repeating functional units called sarcomeres, in contrast with smooth muscle tissue which does not. ... There are 3 types of specific striated muscles, these being: Pharyngeal muscle (embryologically different from skeletal muscle) Cardiac muscle (heart muscle

Braydon reads about the earthquake the occurred in Japan in 2011, and he learns that it had a magnitude of 9.0. What does the magnitude of an earthquake measure? A. the size of the earthquake's seismic waves B. the energy released by the earthquake C. the damage done by the earthquake D. the length of the earthquake

Answers

The answer is A hope this helps
The answer is A, the size of an earthquake’s seismatic waves

Find the functions of the following cell-organelles and organs
1) Nucleus
2) Mitochondria
3) Cell wall
4) Lungs
5) Kidneys
6) Blood
7) Saliva

Answers

Answer:

ALL of the above

Explanation:

Please Help me, answer the questions. The first one is already answered.

Answers

Answer one-Rome won against Carthage. Answer two- Alexandria(Egypt). Answer three- Italy,Sicily. Answer four-North Africa, Sicily, western Mediterranean. Answer 5-North Africa, Spain, Greece, Macedonia, Sicily
Lo que la person Aruba dijo

PLEASEE ANSWER BEFORE FRIDAY APRIL 30 Seven students looked at a barometer, a weather device that measures air pressure. They had different ideas about air pressure. This is what they
thought:
Kimberly:
Glenn:
Rae:
Jeff:
Oliver:
I think air has to be moving to create air pressure.
Air pressure is a downward force.
The higher in the atmosphere, the greater the air pressure.
Air pressure is the same in all directions.
Air pressure increases as the number of air particles increases.
Warm air masses have higher pressure than cool air masses.
When air pressure decreases, it might rain or snow.
Cameron:
Jay:
Circle the names of the students you agree with and describe why you
agree. Describe your ideas about air pressure.

Answers

Answer: pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. ... Meteorologists describe the atmospheric pressure by how high the mercury rises.

Explanation: i hope this helps you. i learned this last year :)

do you believe alien's or external life exist outside of our world? why?

Answers

Answer:

This is not a question we can answer, this is a question only you can answer because it is asking for your personal belief on wether alien's exist outside of earth or not.

Explanation:

Answer:

I do believe that there could be alien life out there, but our radio signals just aren't powerful enough to reach the further parts of space.

Explanation:

In which of these ways might an ectotherm respond to changes in environmental temperature?

fight or flight
move elsewhere
shiver
sweat or pant

Answers

Answer: move elsewhere :)

Explanation:

They must move elsewhere:))

1. Energy from the is transferred to Earth’s surface. Some of that energy is then ____________ to the air ________ the surface.
2.Locations closer to the equator have a __________ temperature. Locations farther away from the equator have a _________ temperature.
3.Locations close to the equator get the ________ energy from the sun. Locations farther away from the equator get the _________ amount of energy from the sun.

Answers

Answer:

2)Higher temperature

Lower temperature

3)highest

Least

Remember that places close to the equator are hotter since the sun is directly overhead while at the poles sunlight intensity is less that is the reason why snowy parts like the artic do not melt

please help me on this!​

Answers

Answer:

White wool

Explanation:

The genotypes of every offspring will be Ww, making white dominant over black.

the answer is white wool *

Select the characteristics of a hydrogen bond: hydrogen attracted to weakly positive atoms a gravitational force intermolecular force between hydrogen and oxygen, fluorine, or nitrogen an attraction between polar molecules

Answers

Answer:

intermolecular force between hydrogen and oxygen, fluorine, or nitrogen

an attraction between polar molecules

Explanation:

these are the correct answers....

Hydrogen bond is a type of intermolecular force between hydrogen atom and oxygen, fluorine, or nitrogen atoms Thus, the correct option is C.

What is Hydrogen Bonding?

A hydrogen bond is a type of an intermolecular attractive force in which a hydrogen atom is covalently bonded to a small, highly electronegative atoms i.e., nitrogen, oxygen, and fluorine. Hydrogen atom is attracted to a lone pair of electrons on an atom in a neighboring molecule. Hydrogen bonds are very strong compared to other dipole-dipole interactions. However, these bonds are weaker than covalent bonds.

Hydrogen bonds are responsible for the surface tension properties of water. The bonds are also responsible for the relatively high boiling point of water molecules because of strong attractive forces.

Therefore, the correct option is C.

Learn more about Hydrogen bond here:

https://brainly.com/question/10904296

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Which example describes an abiotic factor interacting with a biotic factor?

Small fish are food for larger fish.

More light increases the water temperature.

Tropical fish need warm water to survive.

High water temperatures decrease oxygen concentration in the water.

Answers

Tropical fish need warm water to survive

Can someone help me with this asap

Answers

Answer:

The number of caterpillars would increase.

Explanation:

I'm sure

Hydrocarbons are composed of carbon and hydrogen atoms. True or False

Answers

The answer to the question is that it is True
answer : true

hydrocarbon said are composed of carbon and hydrogen atoms is true .

HElPPPpp ! I have to get this done before my picture day time-

Answers

Answer:

it doesn't show up

Explanation:

I don't know why?

Conserving: It’s important to keep our environment safe. It effects both us and animals. One way you can that conserve the environment is by protecting the environment and volunteer in programs that help do so.


Cleaning up: This is very vital to the environment. The amount of trash and litter is insane. Animals on sea or land can eat the trash, thinking that it’s food and can either choke on it and get sick. It also can destroy the plants of the environment, it can even affect humans, like for example a toddler might pick a piece of plastic of the ground and choke on it.

Chiming In.
In order to conserve and protect the environment, we need willing participants that will provide help for the task. Volunteer in beach clean ups, or go to an local park and pick up all the trash. You can also do help without volunteering by just doing the bare minimum, (throwing your trash away in the can, recycle, and encourage those around you to do the same)

Hope this helps

Please help me with this

Answers

Answer:

chlorophyll is pigment Which absorb the sun's energy..

stomata let gases in and out...

green leaf is the factory......

photosynthesis is the process by which green ......

phloem carries glucose to the plant....

radiant energy comes from sun...

chloroplast is the organelle that contains chlorophyll..

xylem distributes water to the plant..

hope my ans helps

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You schedule your next fishing trip during the full moon for the peak fishing action. Today marks the third quarter moon phase. How many weeks will you have to wait for the journey?

1 Week b) 2 Weeks c) 3 Weeks d) 4 Weeks

It takes the moon 29.5 calendar days to orbit Earth. The moon is currently in the third quarter lunar phase, and it’s November 10th. On approximately what date will the new moon occur?

November 17th b) November 24th c) December 1st d) December 8th

Answers

Answer:

b

Explanation:

dffffffffffff

1. C; It’s less than a month which means it’s more predictable of it being a full moon. It isn’t D as that’s a month and when that passes, it will be third quarter again; Seeing as the Third quarter is after the full moon.

2. A; Each moon phase is about 7 days, so the transition of the third quarter to new moon would take about 7 days.

What organelles are usually found in both plant and animal cells?

Answers

They both contain membrane-bound organelles such as the nucleus, cell membrane, endomembranes, mitochondria, ribosome, and peroxisome

Answer:

Nucleus, endomembranes, cell membrane, mitochondria, ribosome.

Explanation:

the diagram shows the life cycle of a fern. what does stage 4 show?

Answers

d. a zygote forms when a sperm fertilizes an egg cell

Answer:

I believe the answer is D.

Explanation:

What is cellular respiration?

Use complete sentences to explain how the mass of carbon is conserved during cellular respiration.

Answers

Answer:

The mechanism by which organisms use oxygen to break down food molecules in order to obtain chemical energy for cell functions is known as cellular respiration. In the absence of oxygen, cells can generate energy by fermenting food, a mechanism known as anaerobic respiration.

Explanation:

- Eijiro <3

It’s the process by which cells obtain energy from glucose sugar by breaking down simple food molecules into usable chemical energy Seeley respiration is different than the trim respiration which is used for breathing. The respiration equation is C6H12O6 + 6O2 -> 6CO2 + 6H2O + energy. Notice the equation is opposite of photosynthesis. Aerobic uses oxygen anaerobic doesn’t use oxygen it doesn’t use enough oxygen so it doesn’t create ATP

1. Energy from the is transferred to Earth’s surface. Some of that energy is then ____________ to the air ________ the surface.
2.Locations closer to the equator have a __________ temperature. Locations farther away from the equator have a _________ temperature.
3.Locations close to the equator get the ________ energy from the sun. Locations farther away from the equator get the _________ amount of energy from the sun.

Help!

Answers

Answer:

DO YOU STILL NEED AN ANSWER?

Explanation:

Can someone please help me!

Answers

First one glaciers, ice caps, snow.
The first person in the picture is right

Please help need answers today.What is the best courses of action for the person shown below.

Answers

im pretty sure its b

Which example is an abiotic factor of an aquarium environment?

water


bacteria


coral


sunfish

Answers

Water since it is nonliving
Water because it’s the only non-living thing on the list

What definition of Virus?

Answers

Answer:

I don't know what you are asking but I gave two answer's

PLEASE GIVE BRAINLEST

Explanation:

an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.

Or

a piece of code which is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data.

In your own words, who were the alchemists? What do you know about them and their work so far?

Answers

Answer:

an alchemist is a person versed in the art of alchemy their goal was to create philosophers stone and discovery of elixir of life

Explanation:

hope it helps❤️

Alchemy is an ancient practice shrouded in mystery and secrecy. Its practitioners mainly sought to turn lead into gold, a quest that has captured the imaginations of people for thousands of years. However, the goals of alchemy went far beyond simply creating some golden nuggets.

Alchemy was rooted in a complex spiritual worldview in which everything around us contains a sort of universal spirit, and metals were believed not only to be alive but also to grow inside the Earth. When a base, or common, metal such as lead was found, it was thought to simply be a spiritually and physically immature form of higher metals such as gold. To the alchemists, metals were not the unique substances that populate the Periodic Table, but instead the same thing in different stages of development or refinement on their way to spiritual perfection.

As James Randi notes in his "Encyclopedia of Claims, Frauds, and Hoaxes of the Occult and Supernatural," "Beginning about the year 100 and reaching its flower in medieval times, alchemy was an art based partly upon experimentation and partly upon magic. Early investigators of natural processes centered their search on a mythical substance they knew as philosopher's stone, which was supposed to possess many valuable attributes such as the power to heal, to prolong life, and to change base metals into precious metal — such as gold." (This "philosopher's stone" was not a literal stone but instead a wax, liquid, or powder that held magical powers.)

What is a phytoplankton? If yall searching it up it non-correct

Answers

Answer:

Phytoplankton is an organism that contains chlorophyll. I think phytoplankton is a microscopic plant-like organism that lives in water and gets its energy from the sun.

Explanation:

Note: I'm not an expert about phytoplankton. I'm just someone who knows it's a microscopic organism that usually lives in water and gets its energy from the sun.

Hoped this helped.

Emma bends and straightens her arms while lifting weights. Which body systems work together to make this happen?

a
Nervous and skeletal

b
Muscular and endocrine

c
Skeletal and muscular

d
Nervous and endocrine

Answers

Answer:

c

Explanation:

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