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2 years ago

1. What is a control and how does a scientist use it in a controlled experiment? control

1 answer:

8 0

A control is a experimental variable that is kept constant or unchanged during an experiment. During a controlled experiment, the controlled variables are held constant to minimize or stabilize their effects on the subject, its unchanging state allows the relationship between the other variables being tested to be better understood.

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Which is the best answer to explain how energy levels are affected as energy moves through a food pyramid?

faust18 [17]

C!! i had this question before . energy decreases at top

3 0

2 years ago

HELP

Tanzania [10]

Answer:

Photosynthesis produces: glucose and $O_{2}$

...from $CO_{2}$ , energy (light) and $H_{2} O$

Respiration produces: energy (ATP), $CO_{2}, H_{2} O$

....from glucose and $O_{2}$

Explanation:

These end products, namely $O_{2}$ and glucose are then used in respiration...

Using energy in the form of solar energy, plants, phytoplankton, algae, and other microorganisms produce chemical energy via photosynthesis. This complex mechanism is central to these species.

They combine light energy from the sun, water, and carbon dioxide.

6 $CO_{2}$ + 6 $H_{2} O$ + (energy) → $C_{6} H_{12} O_{6}$ + 6 $O_{2}$

In the mechanism of cellular respiration, organisms extract energy from food. Sugars in the form of glucose are broken down into carbon dioxide and water during aerobic respiration in mitochondria to produce energy in the form of ATP (adenosine triphosphate).

<h3> $C_{6} H_{12} O_{6} + 6 O_{2} _{\to \$ $6CO_{2} + H_{2} O + energy (ATP)$ </h3>

The waste products, $CO_{2}$ and $H_{2} O$ , result from respiration, these are used as reactants in the photosynthetic process. In turn, its products are the reactants $O_{2}$ and $C_{6} H_{12} O_{6}$ in respiration.

4 0

2 years ago

Describe the function of. Endoplasmic reticulum

Harrizon [31]

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

8 0

2 years ago

In "gastrulation" cells begin to differentiate. They form different types of tissues so they can accomplish different purposes i

valkas [14]

Answer:

The statement that says that In "gastrulation" cells begin to differentiate and they form different types of tissues so that they can accomplish different purposes in the body, is true.

Explanation:

Gastrulation involves a process of cell division, migration and differentiation, being one of the stages of embryonic development.

Cell differentiation and migration in gastrulation leads to the formation of germ layers, which are responsible for forming different tissues and fulfilling different functions in the body:

The outermost lamina is called the ectoderm, which can give rise to nerve tissue and part of the skin tissue.
The mesoderm is the middle lamina, and from it vascular, bone, muscle, and joint tissue can develop, as well as tissues of excretory and reproductive organs.
Endoderm corresponds to the internal lamina, forming in great part the mucous membrane of the organs of the digestive system.

It is true, then, that In gastrulation cells begin to differentiate and form different types of tissues so they can accomplish different purposes in the body.

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2 years ago

Peter is burning fossil fuels as he uses the lawnmower. Which greenhouse gases is he generating?

Strike441 [17]

Answer:

carbon dioxide and methane

OAmalOHopeO

5 0

3 years ago