Answer: i believe the answer is b.Mixtures have two or more components.
Explanation:
Marissa is an extremely curious sixth grader. During a snow day she looked out her window and saw a truck spreading something all over the road. After the truck went past Marissa's house, she had a snack, put on her snow boots, hat, coat, and gloves and went outside to play. She walked over to the edge of her driveway and observed salt all over the roadway, but not the sidewalks or her driveway. She also observed some of the snow and ice had melted off the roadway but not her driveway or sidewalks. She wondered if the ice and snow melting was due to the salt?
What is a possible testable question (in correct format) that Marissa might ask for in this scenario?
IV:
DV:
Hypothesis:
Answer:
yes the ice and snow is melting because salt.
Explanation:
salt absorbs water
The transportation of substances in and out of a cell is regulated by the cell membrane.
Describe two factors that increase the rate of diffusion of a molecule across the cell membrane.
Answer:
membrane surface area and the concentration gradient
Explanation:
the larger the surface area of the membrane that a substance is diffusing through , the faster the rate of diffusion . Likewise , the bigger the difference in the concentration between 2 areas , the greater the concentration gradient and the faster the rate of diffusion.
How do enzymes act as catalysts? (Choose ALL that apply) They allow for fewer collisions of molecules (enzymes + substrates) They allow for more collisions of molecules (enzymes + substrates) They raise the amount of activation energy needed to complete the reaction They lower the amount of activation energy needed to complete the reaction They speed up chemical reactions to form more products
Answer:
- They allow for more collisions of molecules (enzymes + substrates)
- They lower the amount of activation energy needed to complete the reaction.
- They speed up chemical reactions to form more products
Explanation:
Enzymes are proteinous molecules that serves as catalyst in living systems. Like every other catalyst, enzymes function to SPEED UP the rate of biochemical reactions by LOWERING/REDUCING the activation energy, which is the energy required for a reactant to form product (completion of reaction).
Enzymes like other catalysts causes faster movement of molecules in the reaction i.e. they allow for more collisions of molecules (enzymes + substrates). This causes the rate of reaction to increase and hence, speeden the reaction.
Answer:
they lower the activation energy
Explanation:
i took the test
If a hypotonic solution surrounds a cell; water will ___.
move into the cell
move out of the cell
stay the same
be dissolved
be transported by proteins in the plasma membrane
Someone help ASAP!!!
Answer:
move into the cell.
Explanation:
what selection occurs when people breed plants and animals to get desired traits
PLEASE ANSWER
Answer:
Selective breeding! :D
Explanation:
Selective breeding is were humans choose the traits given to the animal.
7. Energy is released from food. *
(5 Points)
Photosynthesis
Respiration
Both
Answer:respiration
Explanation:
Photosynthesis is from plants
Can anyone please suggest why the cassowary bird can digest the fruit, but not the seeds of the rainforests
what is the weight in mars
Answer:
Being that it takes the weight of an object on earth and converts it to Martian weight, the formula is Weight on Mars= (Weight on Earth/9.81m/s2) * 3.711m/s2. To find the Martian weight, we divide the weight on earth by the earth's force of gravity, which is 9.81m/s2. This calculates the mass of the object.
Explanation:
Hope this helps:)
Will a clownfish, from the ocean be able to live in fresh water? Ik betafish can but its graded soo help plz
Answer:
Yes, They are able to live underwater.
Explanation:
Hope this helps you!
What needs to move from the stamen to the pistil of a plant for a flower to reproduce?
1.) spores
2.) pollen
3.) ovules
4.) seeds
Answer:
pollen
Explanation:
Which of the following characteristics is common to both bacteria and viruses?
Group of answer choices
can be killed using antibiotics
contains genetic material
has a cell wall
has a cell membrane
Answer:
Can be killed using antibiotics.
Which term best describes the process that increases the quantity of cells
-locomotion
-nutrition
-mitosis
-respiration
if there are 10 carbon in carbohydrate, how many oxygen would there be
Answer:
Five oxygen atoms.
Explanation:
Carbohydrates usually have a ratio of two hydrogens for one oxygen (just like water)
Which continent is located southeast of the Indian Ocean?
Answer:
Australia and Antarctica. Antarctica would be more south.
Explanation:
Compare the variety of organelles found in plant cells and animal cells?
Answer: In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
Explanation:
3. The diversity of organisms present on Earth is the result of--
a.Ecosystem stability
b. Homeostasis
c. Direct harvesting
d. Natural Selection
The total mass of living matter at each trophic level is called
Answer:
Each stage is a trophic level. Biomass is a measure of the total mass of living material in each trophic level.
Explanation:
PLS HELP ME!! DUE TODAY!!
THIS WILLHELP ME WITH MY GRADE!!
This is an analogy for an organisms' cells building proteins. Tell me what each of the parts below is represented by in the analogy above (look at the highlighted words) IN THE PICTURE
1. Cell-
2. DNA-
3. DNA with a mutation-
4. Nucleus-
5. Organism-
6. Proteins-
7. Ribosome-
Answer:
you just need to explain to your teacher how each part helps the cells
heres the answers:
1. Cell- work together with similar cells to form structures called tissues.
2. DNA-DNA contains the instructions needed for an organism to develop, survive and reproduce.
3. DNA with a mutation- Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.
4. Nucleus- The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information.
5. Organism- Organisms respond to stimuli from their environment and actively maintain their internal environment through homeostasis.
6. Proteins- Your body uses protein to build and repair tissues.
7. Ribosome- Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis — the stitching together of amino acids to make a protein molecule.
8. Amino acid - When you eat protein, your body breaks the protein down into amino acids. Those amino acids are then used to repair and grow new muscle fibers. When you consume an adequate amount of protein, your body will experience something called a positive balance of nitrogen.
If fewer cows are now producing more milk, what natural resources are saved in the dairy industry? What resources might be used more.
Answer:
used less: water, grass, hay, and wheat.
used more: bottles, plastic, carboard (for boxing), wood (box crates).
Explanation:
The natural resources that would be saved in such a scenario are the ones being used to maintain the cows alive and healthy. These include water, grass, hay, and wheat. These natural resources are saved because fewer cows need to be maintained for the same or more amount of milk to be produced. With more milk being produced means all of the resources needed for packaging and selling the milk will be used more, such as bottles, plastic, cardboard (for boxing), wood (box crates).
What is the optimal soil pH for most plant growth? Why is this so?
Select one:
A. 4-5, due to the fact that the majority of soil nutrients are only present at the this pH
B.6-7, due to the fact that the majority of soil nutrients are soluble at the this pH
C. 9-10, due to the fact that the majority of soil nutrients can be absorbed by roots at the this pH
D. 6-7, due to the fact that the majority of soil nutrients are created in soils with this pH
Answer:
B
Explanation:
6.0-7.0 pH is important because most horticultural crops will grow satisfactorily in these levels. It also influences the amount of pH available in the soil, like answer B states.
A bicycle has tires that are 70cm in diameter How far will the bicycle travel in 100 complete revolutions of the tires
Answer:
70*100=7000
Explanation:
70cm times 100 revolutions = 7000cm
when the bicycle tires spin 100 times around it will travel 7000cm.
6. Energy is stored in the form of food.
Photosynthesis
Respiration
Both
Answer:
Respiration
Explanation:
Food energy is chemical energy that animals (including humans) derive from food through the process of cellular respiration. Cellular respiration may either involve the chemical reaction of food molecules with molecular oxygen (aerobic respiration) or the process of reorganizing the food molecules without additional oxygen (anaerobic respiration).
What are three reasons why
deforestation is occurring?
Jack has the most common form of color blindness. What type of color blindness does he have?
red-green
Blue-red
blue-yellow
blue-green
red-yellow
Answer: red and green is the most common color blindness
Explanation:
give me two amphibians that do not have limbs
Answer: Tadpoles and caecilian
Explanation: A type of amphibian that has no legs. Caecilians have ring-shaped folds of skin called annuli, small eyes covered by skin and sometimes bone, and a pair of tentacles. Most of them live underground in the soil, but some spend their entire lives in water.
Answer:
Caecilians and Anguis
Explanation:
A city spends $15 million on a beach nourishment project that adds 1.8 million cubic yards of sand to 3 miles of beach. What is the cost per cubic yard of sand?
Answer:
The answer is $8.33 per cubic yard.
Explanation:
This problem is just a normal math equation. You divide the price by how much space you are covering to get the smallest ratio(15 million divided by 1.8 million). After dividing you get the answer of $8.33 per cubic yard.
light provides the energy to power to what
Answer:
The sun's light (and all light) contains energy. Usually, when light hits an object the energy turns into heat, like the warmth you feel while sitting in the sun. But when light hits certain materials the energy turns into an electrical current instead, which we can then harness for power.
Answer:The sun's light (and all light) contains energy.
Explanation: Usually, when light hits an object the energy turns into heat, like the warmth you feel while sitting in the sun. But when light hits certain materials the energy turns into an electrical current instead, which we can then harness for power
If you know any three things about a gas you can find out the fourth what are the four things
Answer:
Like solids and liquids, gas is a common state of matter.
Pure gases are made up of just one atom. ...
Elemental gases are made up of two or more of the same atoms joined together. ...
Compound gases contain a combination of different atoms. ...
The air we breathe here on Earth is made up of different gases.
Explanation:
Plant cells contain chlorophyll to turn light energy into chemical energy. Chlorophyll, in plant cells, is stored in an organelle that is VERY plentiful in leaf cells. What are these organelles?
Answer:
Chloroplasts are organelles found in the broccoli's cells, along with those of other plants and algae. They capture light energy and store it as fuel molecules in the plant's tissues. Mitochondria are found inside of your cells, along with the cells of plants
Explanation:
plant cell of a plant beacuse the plant
A model that shows the amount of energy that is passed on at each trophic level of a food chain is called ..
Answer:
An energy pyramid.
Explanation: