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Q: What is the blue crab population trend between 1990 and 2008?

Q: Do you think counting the number of adult female crabs gives a good representation of the population? Why or why not?

Q: Do you think the population counts in 1991 and 1999 are accurate? Why or why not?

Animals get their energy by eating plants an animal. A living thing that needs to eat to obtain energy is called a heterotroph.

Energy is defined as the property of matter that allows it to perform work or function.

Heterotrophs are organisms that obtain their energy by consuming other living things, such as plants or animals. They play an important role in the food chain, as they consume other living things and transfer energy up the chain.

For example: A herbivore (an animal that eats plants) is a heterotroph that obtains energy from the plants it consumes.

Therefore, heterotroph is a living thing that needs to eat to obtain energy.

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If the arteries become less stretchy, the heart will have to work harder to eject blood.

Answer:

I would think it's A sorry if this was wrong

Explanation:

Answer:

Question 1: true! Question 2: true! Question 3: false

Explanation:

this might not sound like much, but I LOVE science! however i'm not 100 percent sure on question 2.

Answer:

and We were born just to die

Answer:

Explanation:

every night I can feel my leg and arm

Answer:

A

Explanation:

multiply 5.50 and you know X $50

Answer:

Explanation:

From the information given:

The cell potential on mars E = + 100 mV

By using Goldman's equation:

[tex]E_m = \dfrac{RT}{zF}In \Big (\dfrac{P_K[K^+]_{out}+P_{Na}[Na^+]_{out}+P_{Cl}[Cl^-]_{out} }{P_K[K^+]_{in}+P_{Na}[Na^+]_{in}+ P_{Cl}[Cl^-]_{in}} \Big )[/tex]

Let's take a look at the impermeable cell with respect to two species;

and the two species be Na⁺ and Cl⁻

[tex]E_m = \dfrac{RT}{zF} In \dfrac{[K^+]_{out}}{[K^+]_{in}}[/tex]

where;

z = ionic charge on the species = + 1

F = faraday constant

∴

[tex]100 \times 10^{-3} = \Big (\dfrac{8.314 \times 298}{1\times 96485} \Big) \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]

[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]

[tex]3.981= \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]

[tex]exp ( 3.981) = \dfrac{4}{[K^+]_{in}} \\ \\ 53.57 = \dfrac{4}{[K^+]_{in}}[/tex]

[tex][K^+]_{in} = \dfrac{4}{53.57}[/tex]

[tex][K^+]_{in} = 0.0476[/tex]

For [Cl⁻]:

[tex]100 \times 10^{-3} = -0.0257 \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]

[tex]-3.981 = \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]

[tex]0.01867 = \dfrac{120}{[Cl^-]_{in}}[/tex]

[tex][Cl^-]_{in} = \dfrac{120}{0.01867}[/tex]

[tex][Cl^-]_{in} =6427.4[/tex]

For [Na⁺]:

[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]

[tex]53.57= \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]

[tex][Na^+]_{in}= 2.70[/tex]

Answer:

Dinitrogen is the most common form. It makes up 78 percent of the atmosphere but cannot be used by plants. It is taken into the soil by bacteria, some algae, lightning, and other means.

Explanation:

Answer: If there is competition for food and nesting areas.

Explanation: Barred owls and spotted owls are well known as rivals. Barred owls are known to be aggressive towards spotted owls and are both bigger and more aggressive than them.

Answer:

Nitrogen Base/Nucleotide

Answer:

How many patients had allergies or ear infections, but not both?

24

27

36

40 answer

Explanation:

Answer:

D. Populations of both trees and shrubs decreased due to the increased competition for water.

Explanation:

if both of the trees are competing for water both of them will decrease bc they will both take water from each other causing both of the trees to die.

Answer:

Symbiosis is the biological term of the close association between two organisms where one or both benefit.

Answer: Starch is a long polymer molecule in one shape of a coil. The iodine molecules goes inside of the coil and this is what makes it turn blue/black. Iodine is a diatomic element with the formula, I2.

Explanation:

Answer:

This is because the compound of iodine and starch is unstable, but if you put the test tube in cold water, a dark blue sediment will form once more. When starch is heated to boiling point, it begins to break down, and the chains of amyloses break, thus, forming short chains of dextrins, so the colour starts to change.

Explanation:

Xylem tissue helps in the transport of water and minerals. Phloem tissue helps in the transport of food. Transport in xylem requires physical forces such as transpiration pull. Transport of food in phloem requires energy in the form of ATP.

Answer:

read this

Earth's Spheres

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called “spheres.” Specifically, they are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air). Each of these four spheres can be further divided into sub-spheres. To keep things simple in this course, there will be no distinction among the sub-spheres of any of the four major spheres.

Lithosphere - Land

The lithosphere contains all of the cold, hard solid land of the planet's crust (surface), the semi-solid land underneath the crust, and the liquid land near the center of the planet.* The surface of the lithosphere is very uneven (see image on right). There are high mountain ranges like the Rockies and Andes (shown in red), huge plains or flat areas like those in Texas, Iowa, and Brazil (shown in green), and deep valleys along the ocean floor (shown in blue).

The solid, semi-solid, and liquid land of the lithosphere form layers that are physically and chemically different. If someone were to cut through Earth to its center, these layers would be revealed like the layers of an onion (see right image above). The outermost layer of the lithosphere consists of loose soil rich in nutrients, oxygen, and silicon. Beneath that layer lies a very thin, solid crust of oxygen and silicon. Next is a thick, semi-solid mantle of oxygen, silicon, iron, and magnesium. Below that is a liquid outer core of nickel and iron. At the center of Earth is a solid inner core of nickel and iron.

* Note: The word "lithosphere" can take on different meanings depending on the speaker and the audience. For example, many geologists--scientists who study the geologic formations of Earth--reserve the word "lithosphere" to mean only the cold, hard surface of Earth, not the entire inside of the planet. For the purpose of this course, however, there will be no distinction among the various layers of land. The word "lithosphere" will be used in reference to all land in Earth's system.

Hydrosphere - Water

The hydrosphere contains all the solid, liquid, and gaseous water of the planet.** It ranges from 10 to 20 kilometers in thickness. The hydrosphere extends from Earth's surface downward several kilometers into the lithosphere and upward about 12 kilometers into the atmosphere.

A small portion of the water in the hydrosphere is fresh (non-salty). This water flows as precipitation from the atmosphere down to Earth's surface, as rivers and streams along Earth's surface, and as groundwater beneath Earth's surface. Most of Earth's fresh water, however, is frozen.

Ninety-seven percent of Earth's water is salty. The salty water collects in deep valleys along Earth's surface. These large collections of salty water are referred to as oceans. The image above depicts the different temperatures one would find on oceans' surfaces. Water near the poles is very cold (shown in dark purple), while water near the equator is very warm (shown in light blue). The differences in temperature cause water to change physical states. Extremely low temperatures like those found at the poles cause water to freeze into a solid such as a polar icecap, a glacier, or an iceberg. Extremely high temperatures like those found at the equator cause water to evaporate into a gas.

** Note: Some scientists place frozen water--glaciers, icecaps, and icebergs--in its own sphere called the "cryosphere." For the purpose of this course, however, frozen water will be included as part of the hydrosphere. The word "hydrosphere" will be used in reference to all water in Earth's system.

Biosphere - Living Things

The biosphere contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth.***

Within the biosphere, living things form ecological communities based on the physical surroundings of an area. These communities are referred to as biomes. Deserts, grasslands, and tropical rainforests are three of the many types of biomes that exist within the biosphere.

Answer:

It's occur in mitosis.

Explanation:

This occur mainly in Mitosis.

In mitosis the parent cell divides into two daughter cells and its then replicates it chromosomes number or dna in the daughter cells. Therefore each daughter cells carries the same number of chromosome as the parent , therefore they are genetically identical as the parent cells.

Therefore, they most have the same number of chromosomes so that they can be genetically identical as the parent cell

Daughter mitotic cells must have the same genetic information as parent cells to carry out normal cellular functions. Moreover, mitosis also ensures the correct segregation of homologous chromosomes in successive cell divisions.

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Answer:

D. The half-life of Material 1 is 5 years more than the half-life of Material 2.

Explanation:

As you can see in the graphs for material 1 to get to 50% it takes 30 years. for material 2 it takes 25 years to get to 50%. Therefor the halflife of material 1 is 5 years more than material 2

Answer:

The correct answer is - raising in water becomes puffed, or uptake of water and minerals from roots.

Explanation:

The minimum pressure applied to a solution to prevent the entering the flow of its pure solvent through q semipermeable membrane. The process of flowing the pure solvent to the solution through a semipermeable pressure is known as osmosis and the minimum pressure required to preventing the osmosis is osmotic pressure.

Many plants springing up through tree roots growing through concrete. Due to osmotic pressure, the plants grow they require more water, the inexorable osmotic pressure of water moves through the membranes can actually push through asphalt!

Movement of salt-water in the animal cell across our cell membrane and keep raisin in water and the raisin gets puffed are other examples of this phenomenon.

Octopus... I guess_________!!!!!

Answer:

octopus

Explanation:

the blue blood comes from a copper-rich in protein called hemocyanin

Answer:

1. The cells grew because of cell division. (One cell doubles by two)

2. The G stands for Growth

3. Circle the little purple things

Answer:

die because bladder is really important to

The last one. Horses evolved and adapted to the new environment which is why they're legs grew longer

Answer:

Yes Asha is correct because when she mixed the purple berry with water into the chemical it changed color.

Explanation: