Answer: eye contact
Explanation:
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HELP!!! due today and ignore the one i chose if its incorrect
explain what happens to engery through a system
Answer:
As energy moves through trophic levels in an ecosystem the amount that is available decreases. ... A: Energy flows in a food web by being transferred to and between organisms as they undergo photosynthesis, are consumed by another organism, or decompose.
which theory states that homo sapiens began in a single geographical area and spread out from there?
a. out of africa theory
b. tectonic theory
c. multi-regional theory
Answer:
The out of Africa theory states that Homo sapiens began in a single geographical area and spread out from there.
Explanation:
A is correct because the ''out of Africa theory'' suggests that the Homo sapiens began as a species in Africa and from there it gradually spread out on the other continents across the world.
B is not correct because the ''tectonic theory'' is a theory that has nothing to do with the Homo sapiens species, but it is a theory about the movement of tectonic plates.
C is not correct because the multi-regional theory suggests that the Homo sapiens evolved into multiple regions simultaneously, not in one region only.
will give brainlist
Earth's surface is constantly changing, and new landforms are constantly taking shape due to natural processes. Which landform is most likely caused by deposition?
A. caves
B. valleys
C. Deltas
D. lakes
Answer:
C. Deltas
Hope it helped :)
Is this true or false
The process of change during an organism's life that results in a more complex organism is called growth.
Answer:
true
Explanation:
4. Jimmy likes to work with his friend Joe in 7th grade science class labs. However, he notices that he tends to get lower grades when he does work with Joe, because he and Joe like to talk about basketball and not science. He's decided to investigate if his science lab grades are higher when he works with Joe or if they're higher when he works with someone else. He has set goals to become a better student, so help him write a hypothesis for his study. a. Manipulated variable b. Responding variable
Answer:
If Jimmy works better with someone other than Joe, then Joe is a part of the problem of Jimmy getting lower grades.
b responding variable
Explanation:
If, then statements are used for scientific hypothesis's.
In an experiment, there is always a manipulated variable and a responding variable.
In Jimmy's experiment, his aim is to determine whether working with someone other than Joe will lead to an improvement of his grades so he can have a hypothesis that reads thus; "Working with another student other than Joe will lead to improvement of my grades".
In this experiment, the manipulated variable is his study partner while the responding variable is his grades.
Learn more: https://brainly.com/question/967776
calculate the average number of moose killed by one wolf in each territory
Answer:
where are the territories
Explanation:
Which of the following is correct
Answer:
D
Explanation:
Answer:
option C.- There is an abundance of lava in volcanoes around the world.
Factual information can be presented with bias.
Please select the best answer from the choices provided.
true or false
Answer:
It's TRUEExplanation:
The first answer was wrong
HELP
The cells, which can not reproduce in an adult, are the
O smooth muscle
O epithelial
O cardiac muscle
O connective tissue
Which of the following best describes a saturated fatty acid?
a. A lipid containing double bonds between carbons
b.A lipid sharing one pair of electrons between carbons
c. a nutrient organic molecule that is acidic
d.any lipid nutrient molecule containing carbons and hydrogens
Answer:
Any lipid nutrient molecule containing carbons and hydrogens.
in the processes of photosynthesis what supplies the hydrogen(H) used in the formation of glucose
Answer:
NADPH ( nicotinamide adenine dinucleotide phosphate)
WILL BE MARKED BRAINLIEST AND PLUS 12 POINTS
Which detail from the passage best explain why plants photosynthesize?
Answer:
B.
Explanation:
I am pretty sure that is the answer
Answer:
A
Explanation:
Guys please help.I don’t have much time
Each eye has its own objective in the dissecting microscope so that 3D objects can be seen as 3D, whereas the compound microscope has two oculars, but only one objective for both eyes. 3. Compound Microscopes have greater magnifications, but lower resolutions than the Dissecting microscopes.
Why can scientists compare the amino acid sequences of the proteins of three different living organisms?
A. because the genetic code is universal for all organisms
B. because the basic anatomy for all living organisms is the same
C. because RNA cannot be used to show evolutionary relationships
D. because the sequence of RNA is the same in all living organisms
Answer: A. because the genetic code is universal for all organisms
Explanation:
The genetic code of living things refers to the information that cells in living organisms use to encode genetic information from the DNA and the RNA into proteins.
Every living organism uses the same genetic code and scientists believe this is because we all share a common history in terms of evolution. This homogeneity is advantageous because it enables scientists to be able to compare amino acid sequences across multiple living species.
Any resource necessary to the survival of populations in an ecosystem may become a(n)
A. abiotic factor.
B. biotic factor.
C. limiting factor.
D. niche.
The layer of the Earth called the mantle is often described as convecting. In this context, convection is
A.
a process that keeps the mantle stationary.
B.
a continuous cycle in the Earth's interior.
C. a step in the formation of sedimentary rock.
D.
a process that occurs on the Earth's surface.
Answer:
B
Explanation:
Convection occurs to divert heat generated by the core and spread through the mantle. at the bottom of the mantle, heat is gained, causing the mantle to be less dense and rise up. at the top, heat is subsequently lost, resulting in am increase of mass and a drop down for the mantle. this process repeats indefinitely
Convection is a continuous cycle in the interior of the Earth.
Convection of Earth's mantleThe prime mechanism of heat transfer in the mantle of the Earth is convection.
Convection of mantle illustrates the movement of the mantle as it mediates heat from the white-hot core to the brittle lithosphere.
It is a thermally driven procedure in which heating at depth makes the material to expand and become less dense, making it to elevate while being substituted by the complimentary cool substance, which sinks.
This phenomenon of heat gain and heat loss takes place continuously in the mantle of the Earth.
Thus, the correct answer is option B.
Find out more information about convection of mantle here:
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The goal of a statement of purpose is:
A. to demonstrate that a hypothesis is wrong
B. To list the materials needed for an experiment
C. To calculate an average of two or more measurements
D.To indicate what is expected to be accomplished in doing an experiment
The _____
layer of the skin is made of dead cells.
Answer:
The stratum corneum is the layer of skin made of dead cells.
Answer:
Top layer
Explanation:
Hope this helps
PLZZZ HELPPP
Explain how rocks can be analyzed to determine the history of an area.
Answer:
Well let's take Sedimentary rock for example, The Law of Superposition which measures the average age of Sedimentary rocks using rocks around it. So you would use that rocks below it are older and that Extrusions and Intrusions are younger than the rocks which are stable.
Explanation: Hope it Helps With Your Work!
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How many meters are there in 2.5 kilometers?
Answer:
there are 2500 meters in 2.5 kilometers.
Answer:
2500 meters
Explanation:
Why do plants not have any special respiratory organs like animals? Give two reasons.
Answer:
Hmm.
Explanation:
'Plants do not have lungs or any respiratory orgasm in themselves so they don't need the process of respiration. Plants do not need a respiratory system because roots, stems, leaves of plants exchange gases for respiration separately. They don't have lungs to breathe so they don't need a respiratory system.'
Basically, plants don't need respiratory organs because they have roots, stems, and leaves, which they use to breathe.
Also, because they are plants. These are the same guys who take energy from the sun.
What do viruses, animal cells, plant cells, and bacteria have in common
Answer:
They are alive.
Explanation: They are all part of a living organism.
Some steps in cell division are shown below:
1. Haploid chromosomes condense
2. Number of chromosomes are reduced to half
3. Chromosomes move to the equatorial plane between the poles
4. Centromeres separate and the sister chromatids are pulled apart to opposite poles by the spindle
Which of the following steps is most likely to occur during meiosis 2 only?
Step 1
Step 2
Step 3
Step 4
Answer:
Step 2
Explanation:
when a raw, shell-less egg was placed in sugar solution the egg shrank the egg was brought back to its original size by placing it it water which process does the experiment demonstrate
Answer:
A: osmosis. The egg first expanded because it was placed in a hypertonic solution (sugar water), causing the water to exit the egg to balance the higher concentration of solute outside of the egg. Placing it in fresh water creates a hypotonic environment, thereby causing water to rush back in.
Explanation:
The almost pure cellulose obtained from the seed threads of Gossypium (cotton) is tough, fibrous, and completely insoluble in water. In contrast, glycogen obtained from muscle or liver disperses readily in hot water to make a turbid solution. Despite their markedly different physical properties, both substances are (14)-linked D-glucose polymers of comparable molecular weight. What structural features of these two polysaccharides underlie their different physical properties
Answer:
Cellulose is held by beta 1,4-glycosidic bonds making it linear while Glycogen is held by an alpha 1,4-glycosidic bond making it highly branched.
Explanation:
Cellulose and Glycogen are both carbohydrate polysaccharides formed from glucose monomers. According to the question, cellulose is a tough, fibrous, and insoluble (in water) polymer found to play a structural role in plants' cell wall while Glycogen is another polymer obtained from muscle or liver and disperses readily in hot water to make a turbid solution.
Although these two polysaccharides (cellulose and glycogen) are linked by (1, 4)-glycosidic bonds but the glucose monomers in CELLULOSE are linked by a beta 1,4-glycosidic, hence, making it a straight or linear polymer
GLYCOGEN, on the other hand, is linked by an alpha 1,4-glycosidic bond making it an highly branched polymer. This structure is responsible for the different physical properties of the two molecules.
briefly explain the relationship between cells, organs and tissues
Answer/Explanation:
Cells of a similar type are organized together to make tissues. Different types of tisues come together to perform a similar function as part of organs.
For example, take the organ the stomach. There are various tissues that make up the stomach, including, for example, mucosa, and muscle tissue.
The mucosa tissue of the stomach is made up of secretory cells such as parietal cells, which secrete hydrochloric acid, and foveolar cells which produce mucus that protects the lining of the stomach.
How many amino acids will 15 codons code for
Answer:
20 amino acid
Explanation:
15+5 =20 so its 20
The endomembrane system works together in the ________ of lipids and proteins.
Sorting, tagging, packaging, and distribution of lipids and proteins takes place in the Golgi apparatus (also called the Golgi body), a series of flattened membranes (Figure 4.4. 3). The receiving side of the Golgi apparatus is called the cis face.
What unique property of water allows for some insects to "walk" on water 2 points
and not sink? *
Adhesion
Cohesion
Specific Heat
Surface Tension
Answer:
Surface Tension
Explanation:
The correct answer is Surface Tension because the structure of there feet in combination with the surface tension of the water allow some insects to walk on water.