Please help, I really need this.

Answer:

True

Explanation:

They have more options and possible ways

Answer:

true,

The food web provides a better model of an ecosystem because the food web is a model between MANY different consumers and producers in an ecosystem. While the food chain is a model for just one consumer and producer. ... Because energy is lost as it moves from producers to consumers, the bottom level is the largest.

Answer:

Darwin suggests that the strongest survive and adapt to produce even stronger more adaptable offspring

Answer:

I think it has a DNA or RNA

Answer:Plant cells have plasmodesmata, a cell wall, a large central vacuole, chloroplasts, and plastids. Animal cells have lysosomes and centrosomes.

Explanation:The best answer

Answer:

Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.

Answer: Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.

Explanation:

Answer:

C-Effects of poverty

Explanation:

Answer:

See the answer below

Explanation:

(a) One of the inorganic sources of new plant mass for the light-grown plants is the atmosphere. The carbon in the form of carbon dioxide in the atmosphere is sequestrated into the body of the light-grown plants through a process known as photosynthesis. During this process, the inorganic carbon dioxide becomes fixed into the body of the plant through a series of steps that include both light-dependent and light-independent. The overall equation of the process is as below:

[tex]6CO_2 + 6H_2O + Light --> C_6H_1_2O_6 + 6O_2[/tex]

As more plant mass is being gained by photosynthesis, some of the gained mass is also being lost to energy generation through a process known as respiration. Respiration is like the complete opposite of photosynthesis but a gain in mass is still possible because the rate of photosynthesis is more than the rate of respiration in the light-grown plants.

(b) The chemical reaction that can be held responsible for the decrease in mass of the dark-grown plants is respiration. Some of the mass is lost to energy generation and this mass cannot be recouped by adequate photosynthesis due to light limitation. The energy is needed to metabolic processes that would keep the plants alive. The equation of respiration is as below:

[tex]C_6H_1_2O_6 + 6O_2 --> 6CO_2 + 6H_2O + Energy[/tex]

Answer:

A) Inorganic source of cellular mass is CO2. Plants take up CO2 from the atmosphere. By the process of photosynthesis, plants prepare sugars . Sugar gets converted in to starch, cellulose and other carbohydrates which are stored in the cells of the plants. This increases the plant mass . Plant requires water,CO2, light chlorophyll.

Chlorophyll absorbs sun light and converts it in to chemical energy. Chemical energy is used by the plant to synthesize sugars. Because of the synthesis of the sugars ,starch etc , the mass of the plant increased. Plants need light for making sugars.

B. Decrease in the mass is due to cellular respiration. This group of plants are in dark. So they do not photosynthesis.

But they have to undergo respiration to get energy for the activities of the plant. So no photosynthesis is occurring, hence no sugar formation. But sugar present in the plant is consumed to release energy. That is why mass of the plants kept in dark is reducing.

Cellular respiration has 3 steps. 1. Glycolysis 2. Kreb's cycle. 3. Electron Transport Chain.

The cellar respiration provides energy to all living organisms.

[tex]C6H12O6 + 6 O2 ---------> 6CO2 + 6H2O + energy (ATP)[/tex]

CO2 released is given out of the plant body. So this is reducing the plant mass.

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Answer:

D. all of the above

Explanation:

por que si

Answer:

The answer is false.

Explanation:

The red shift means that objects are moving away from the sun and Earth.

Answer:

Western Australia

Explanation:

Microscopic fossils discovered in a nearly 3.5 billion-year-old piece of rock in Western Australia.The oldest fossils ever found and indeed the earliest direct evidence of life on Earth

Answer:

Answer is on the pic

Explanation:

I hope it's helpful!

Medium 3 bc it progressed the most

Answer:

After this, rRNA creates bonds between amino acids to make proteins.

Some important points to know:

rRNA (Ribosomal RNA) is used in the synthesis of proteins.

Amino acids are the building blocks of proteins which means that proteins are made up of amino acids.

When amino acids are joined together, they form proteins.

The bond between two or more amino acids when bonded is called "peptide bond".

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

rRNA  bonds with mRNA which creates peptide  bonds between amino acids creating PROTEINS

Explanation:

Answer: 4.4; 10,339; 0.145

Explanation:

F = c/L f = frequency, c= wave speed L = wavelength

1. 2.364 = 10.4045/c, c= 10.4045/2.364 = 4.4

2. 30.025 = L/346, L = 30.025*346 = 10,339

3. period of the wave  6.875/4 = 1.72 and f= 1/period = 4/6.875 = 0.145

Answer:

The images of parts of the human nervous system in order from lowest to highest degree of internal organization are as follows: cell, tissue, organ and system. The cells are produced to form the tissues in the body and it is produced for an organ to be produced.

Answer: cell, tissue, organ and system.

Explanation:

Answer:

C.

Explanation:

Hope this helps

Answer:

Element

Explanation:

Hope this helps :)

Answer:

Explanation:

There is little evidence that early fears about gene patenting placing substantial ... owner and do not protect against independent invention), patents require disclosure that ... gene knock-out methods and even for individual gene sequences. ... Human gene patents result from the cloning and description of the sequence of a ...

so option c maybe

Answer:

a glass of muddy water

Explanation:

Pure substances contain only one element or compound.

Calcium is one element so it is a pure substance. Ice and water have the same molecular structure, so it is a pure substance. Aluminum oxide is a chemically pure compound.

The only example that is not a pure substance is muddy water due to the multiple components of mud mixing with the components of water.

Hope that helps.

Answer:

Explanation! Hope this helps and you dont fail <3

Explanation:

The advantages of sexual reproduction: produces genetic variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease is less likely to affect all the individuals in a population.

Answer:

Genetic variation in the offspring, and certain diseases are less likely to affect all the individuals in a population.

Explanation:

How would an increase in surface temperatures in the pacific affect sea otters and why would this happen?

The water that sea otters live in is chilly, ranging from 35 to 60 degrees Fahrenheit—much too cold for humans. Otters don't have blubber to keep them warm like other marine mammals. Instead, they rely on their thick fur coat to maintain a constant body temperature of 100 degrees Fahrenheit.

Answer:      ½ Rr (pink)     ½ RR (red) b. rr × Rr gametes:      Rr: ½ R, ½ r     rr: all roffspring:      ½ Rr (pink)     ½ rr (white) c. RR × rr gametes:      rr: all r     RR: all Roffspring:      all Rr (pink) d. Rr × Rr gametes:      Rr: ½ R, ½ r for each parent offspring:      ½ Rr (pink)     ¼ RR (red)  ¼ rr (white)

Explanation:

Answer:

The lungs are covered by a thin tissue layer called the pleura. The same kind of thin tissue lines the inside of the chest cavity -- also called pleura. A thin layer of fluid acts as a lubricant allowing the lungs to slip smoothly as they expand and contract with each breath

Answer:

Blood flowing through the circulatory system transports nutrients, oxygen, and water to cells throughout the body. The journey might begin and end with the heart, but the blood vessels reach every vital spot along the way. These arteries, veins, and capillaries make for a vast network of pipes. If you were to lay out all the blood vessels of the body in a line, they would stretch for nearly 60,000 miles. That’s enough to circle the earth almost three times!

1. The Three Major Types of Blood Vessels: Arteries, Veins, and Capillaries

The different types of blood vessels and their layers

Blood vessels flow blood throughout the body. Arteries transport blood away from the heart. Veins return blood back toward the heart. Capillaries surround body cells and tissues to deliver and absorb oxygen, nutrients, and other substances. The capillaries also connect the branches of arteries and to the branches of veins. The walls of most blood vessels have three distinct layers: the tunica externa, the tunica media, and the tunica intima. These layers surround the lumen, the hollow interior through which blood flows.

2. Oxygenated Blood Flows Away from the Heart Through Arteries

The major arteries and branches of the body

The left ventricle of the heart pumps oxygenated blood into the aorta. From there, blood passes through major arteries, which branch into muscular arteries and then microscopic arterioles. The arterioles branch into the capillary networks that supply tissues with oxygen and nutrients. The walls of arteries are thicker than the walls of veins, with more smooth muscle and elastic tissue. This structure allows arteries to dilate as blood pumps through them.

3. Veins Carry Blood Back Toward the Heart

The superior and inferior vena cava

After the capillaries release oxygen and other substances from blood into body tissues, they feed the blood back toward the veins. First the blood enters microscopic vein branches called venules. The venules conduct the blood into the veins, which transport it back to the heart through the venae cavae. Vein walls are thinner and less elastic than artery walls. The pressure pushing blood through them is not as great. In fact, there are valves within the lumen of veins to prevent the backflow of blood.

4. Exchange of Gases, Nutrients, and Waste Between Blood and Tissue Occurs in the Capillaries

Click to play an animation of blood flow through capillaries

Capillaries are tiny vessels that branch out from arterioles to form networks around body cells. In the lungs, capillaries absorb oxygen from inhaled air into the bloodstream and release carbon dioxide for exhalation. Elsewhere in the body, oxygen and other nutrients diffuse from blood in the capillaries to the tissues they supply. The capillaries absorb carbon dioxide and other waste products from the tissues and then flow the deoxygenated blood into the veins.

5. The Constant Pumping of the Heart Maintains Blood Pressure and Supply Throughout the Body

Click to play an animation of blood pressure measurement

The blood moving through the circulatory system puts pressure on the walls of the blood vessels. Blood pressure results from the blood flow force generated by the pumping heart and the resistance of the blood vessel walls. When the heart contracts, it pumps blood out through the arteries. The blood pushes against the vessel walls and flows faster under this high pressure. When the ventricles relax, the vessel walls push back against the decreased force. Blood flow slows down under this low pressure.

Answer:

Crossing over

Explanation:

Prophase I is the first stage of meiosis I, it is the longest phase of meiosis. Crossing over (also known as recombination) can be defined as the process of exchange of genetic material between non-sister chromatids that occurs during Prophase I. Crossing over represents a critical source of genetic variation in offspring (the other one is the random orientation of the homologous chromosomes pairs). After crossing over, the resulting haploid (n) gametes aren't genetically identical to one another.

Answer:

Mutation in genes or by damage to chromosomes

Explanation: