Which of the following is true?
A.Eukaryotes do not contain cells.
B.Eukaryotes are all multicellular.
C.Eukaryotes can be unicellular or multicellular.
D.Eukaryotes are all unicellular

How does the attraction between the particles of a liquid relate to the
temperature at which the liquid changes state?
A. Weak attractions mean the liquid boils at a higher temperature.
B. Strong attractions mean the liquid freezes at a lower temperature.
C. Weak attractions mean the liquid freezes at a lower temperature.
D. Strong attractions mean the liquid boils at a lower temperature.

A chemical reaction is shown in the expression below.

LaTeX: C_{2_{_{^{^{^{^{^{^{^{ }}}}}}}}}}H_{12}O_6+O_2\longrightarrow CO_2+H_2O+energyC 2 H 12 O 6 + O 2 ⟶ C O 2 + H 2 O + e n e r g y

Which statement correctly explains this reaction?

Group of answer choices

Water is used to produce glucose during photosynthesis.

Oxygen is used to release energy during photosynthesis.

Glucose is broken down to release energy during cellular respiration.

Carbon dioxide is broken down to release energy during cellular respiration.

The area that includes everything between the cell membrane and the nucleus of a cell is called the ___________.
A.mitochondria
B.chloroplast
C.cytoplasm
D.vacuole

a scientific belief that was accepted centuries ago, but has since been disproved. How does it support the use of the term "scientific theory" instead of "scientific fact?"

Please please i beg of you if you can take a few minutes out of your day to do this for me it would be great.

Make a table comparing and contrasting solids, liquids, and gases.

Please help

Question 11 (2 points)
A student thinks that scientific theories are not reliable sources of information, since scientists tend to argue about the details of them. What is the flaw in the student's reasoning? (2 points)

a
The arguments between scientists tend to make theories stronger, not weaker.

b
Scientists rarely disagree about scientific theories.

c
Scientific theories do not change over time, which makes them reliable.

d
It is rare for a scientific theory to be valid for more than a few years.

Question 12 (2 points)
Which describes the current model of the atom? (2 points)

a
It can be used to predict atomic behavior in most circumstances.

b
It has been perfected and will never be changed in the future.

c
It is only accepted by a small fraction of scientists.

d
It is only useful in very specific circumstances.

Question 13 (2 points)
Which subatomic particles have an electrical charge? (2 points)

a
Electron and proton

b
Neutron and proton

c
Only electron

d
Only proton

Question 14 (2 points)
A student thinks that the more protons an atom has, the more reactive it will be. Which will best disprove this student's idea? (2 points)

a
Compare the reactivities of lithium (Li) and krypton (Kr).

b
Note that rubidium has 48 neutrons.

c
Compare the number of protons in cesium (Ce) and xenon (Xe).

d
Count the number of neutrons in an atom of helium.

Question 15 (2 points)
Which element has a larger atomic number than silver (Ag)? (2 points)

a
Pd

b
Cu

c
Ni

d
Hg

Question 16 (2 points)
How do scientists use creativity in their careers? (2 points)

a
Devising a hypotheses involves creating new explanations for phenomena.

b
The most important part of an experiment is how colorfully the data is displayed.

c
Scientific results must be explained in a creative, exciting way.

d
Scientists judge each others' work based mostly on how creative it is.

Question 17 (2 points)
What does the position of magnesium (Mg) on the periodic table tell you about how it reacts with other elements? (2 points)

a
It is in the second column, so it tends to gain two electrons.

b
It is in the second column, so it tends to lose two electrons.

c
It is in the third row, so it tends to lose three electrons.

d
It is in the third row, so it tends to gain three electrons.

Question 18 (2 points)
Which best describes how magnesium (Mg) and oxygen (O) bond? (2 points)

a
They form an ionic bond by exchanging two electrons.

b
They form an ionic bond by exchanging three electrons.

c
They form a covalent bond by sharing one electron.

d
They form a covalent bond by sharing four electrons.

Question 19 (2 points)
Which question could be answered using DNA as a molecular clock? (2 points)

a
How old is a dinosaur bone?

b
How long ago was a dinosaur track left in the mud?

c
How long ago did two species of birds share an ancestor?

d
How old was a bird when it died?

Question 20 (2 points)
Calcium chlorate has the formula Ca(ClO3)2. Which best describes the structure of calcium chlorate? (2 points)

a
One molecule of calcium chlorate contains nine atoms.

b
Calcium chlorate is an element that contains three atoms.

c
It takes nine different elements to make one molecule of calcium chlorate.

d
Calcium chlorate contains two Ca groups.

Two friends push with great force against a rock. The forces are equally strong but in opposite directions. A heavy box rests on top of the rock. Answer these questions about the motion of the rock. Assume that the rock is light enough for either friend to carry.

One friend steps away from the rock. Does the rock move? If so, in which direction does it move?

When a person looks at a bright light, tiny muscles in the eye contract so less light can enter the eye.

Which are most likely the characteristics of this muscle? Select three options.

nonstriated
involuntary
voluntary
striated
attached to skull
attached to the eyeball

I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY FIRST . The image below depicts Earth's ozone levels from 2016. The darker portion indicates the lowest level of ozone.

Which of the following statements is true?

A. Thinning ozone levels in the atmosphere only affect the North Pole.

B. Thinning ozone levels in the atmosphere contribute to changes in bird migration patterns.

C. Thinning ozone levels in the atmosphere always accelerate the rate of photosynthesis in plant life.

D. Thinning ozone levels in the atmosphere may lead to increased exposure to ultraviolet radiation at the Earth's surface.

can someone please answer this question

Explain oxidation using rust as an example

When a volcano erupts, particles of rock and ash are released into the atmosphere. After this, water droplets form around the rock and ash particles and fall to Earth as rain. The rainwater helps plants grow.

In this scenario, which spheres of Earth interact?

biosphere, cryosphere, hemisphere
cryosphere, geosphere, biosphere
geosphere, hydrosphere, biosphere
hydrosphere, cryosphere, geosphere

Susan has just moved into a new house. For some reason, she cannot get the grass to grow in her yard. She decides to grow small amounts of grass inside her house as part of an experiment. The first group of grass is exposed to a light intensity of 400. The second group is exposed to a light intensity of 1200.



Using the graph, which of the following should be expected from Susan’s two groups of plants?

Group of answer choices

The plants at a light intensity of 1200 will produce more oxygen than the plants at 400.

The plants at a light intensity of 1200 will perform only stage 1 of photosynthesis.

The plants at a light intensity of 400 will produce more glucose than the plants at 1200.

The plants at a light intensity of 400 will grow more quickly than the plants at 1200.

I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST WITH AN EXPLANATION THAT MAKES SENSE. Which of the following is NOT considered a result of global warming?


A. rise in sea levels


B. increase in fossil fuel emissions


C. increase in ocean temperatures


D. melting of glaciers and polar ice caps

Compare and contrast the conditions required for snow and rain to form.

Two people are trying to push a large box across a floor. Each person pushes with an equal amount of force. The total amount of force they exert on the box is 500 newtons. Despite their efforts, the box does not move.

What is the amount of force exerted by the box on the two people?

0 newtons


250 newtons


500 newtons


1500 newtons

PLZ ANSWER NOW
The hair on Jamal’s arms is standing straight up.

What most likely explains why his hair is behaving this way?

He is in a cold area.
He is sweating.
He is in danger of bacteria.
He is receiving information for touch.

Which function do the stomata perform in photosynthesis?(1 point)

Help! Its the last thing i needa do!

The prefix hmomo comes from the Greek word that means " the same or alike". Predict the meaning of the prefix hetero.

please help check over my work, sorry for spamming

What is 4fe + 3o2 → 2fe2o3 balanced?

You should use a calculator to help you with this assignment. Question 2 options: True False

Select all that apply.
Select the major problems associated with the production of nuclear energy.

1. harm to animal and plant life
2. air pollution
3. potential reactor accidents
4. hazardous solid wastes
5. depletion of natural resources

Susan has just moved into a new house. For some reason, she cannot get the grass to grow in her yard. She decides to grow small amounts of grass inside her house as part of an experiment. The first group of grass is exposed to a light intensity of 400. The second group is exposed to a light intensity of 1200.


Using the graph, which of the following should be expected from Susan’s two groups of plants?

Group of answer choices

The plants at a light intensity of 1200 will produce more oxygen than the plants at 400.

The plants at a light intensity of 1200 will perform only stage 1 of photosynthesis.

The plants at a light intensity of 400 will produce more glucose than the plants at 1200.

The plants at a light intensity of 400 will grow more quickly than the plants at 1200.

Which protects nerve endings at the ends of fingers and toes?

joints
hair
nails
muscle

imagine you are volunteering in a 1​ st ​ grade classroom. The students recently learned about the water cycle. One student raises her hand and asks, “I heard that elements like carbon can cycle too. How does carbon cycle? Is it like how water cycles?” How would you explain the cycling of carbon to this 1​ st ​ grade class? Keep in mind that the students have likely not taken an advanced science course ​yet​!

please help with this answer

Which organs are part of the musculoskeletal system? Select three choices.

a. bones
b. hair
c. muscles
d. skin
d. tendons
e. nails

Imagine that it is a sunny day and you are looking at a building that has solar panels on the roof. Which of the following statements correctly describes the way light is interacting with the solar panels?
Select all that apply.

A
The panels are reflecting nearly all of the light energy.

B
The panels are absorbing a lot of light energy.

C
The panels are transmitting most of the light energy.

D
The panels are reflecting some of the light energy.