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3 years ago

Briefly describe how cell differentiation occurs in the developing animal embryo

1 answer:

4 0

Embryonic differentiation is the process of development during which embryonic cells specialize and diverse tissue structures arise. Animals are made up of many different cell types, each with specific functions in the body. However, during early embryonic development, the embryo does not yet possess these varied cells; this is where embryonic differentiation comes into play. The differentiation of cells during embryogenesis is the key to cell, tissue, organ, and organism identity.

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Design an imaginary food web or describe a real one. Include at least 4 living organisms that interact in your ecosystem.

PtichkaEL [24]

The trophic web is the interaction between different organisms in which there is energy transference. In the attached example, we consider plants, beetle, rabbit, frog, eagle, fox, mountainlion, and fungi.

<h3>What is the trophic web?</h3>

The trophic web is the interaction between different organisms involving transference of energy when some of them feed on the other ones.

The ones placed at lower levels pass energy to the ones at the higher levels.

Organisms at each level feed on the preceding one and become food for the next one.

• The first link corresponds to a producer organism -autotroph-.

• The following links are the consumers -heterotrophs- ⇒ herbivores and carnivores.

• The last links are the decomposers that degrade organic matter from dead organisms.

Because it is a web, all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.

Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.

Example.

To make the trophic web, first, we need to have at least four links.

So first, let us list the organisms we are working with, and then define the position of each of the organisms on the web.

plants,

beetle,

rabbit,

frog,

fox,

mountain lion,

eagle,

Fungi

Producer → this is the autotroph organism that takes energy from the sun or any other inorganic source → An example of this is any plant.

Consumers → heterotroph

⇒ Herbivores → These are the animals that feed on any part of the plants → These are the beetle and the rabbit

⇒ Carnivores → These are the animals that feed on herbivores → These are the frog, the fox, the eagle, and the mountain lion

Decomposer → detritivorous organisms that take energy from dead matter → Fungi

Trophic web,

Plants directly provide energy to the beetle and the rabbit

Plant >> Beetle and Rabbit

The eagle takes energy from the rabbit and the frog takes energy from the beetle.

Rabbit >> Eagle

Beetle >> Frog

The fox takes energy from the frog and from the rabbit

Frog and rabbit >> Fox

The Fox and the eagle transmit energy to the mountain lion.

Fox and Eagle >> Mountain lion

Fungi takes energy from dead organic matter

Plants, beetle, Rabbit, Fox, Eagle, Mountain lion >> Fungi

You will find an image in the attached files.

You can learn more about the trophic web at

brainly.com/question/8354950

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5 0

2 years ago

What about cellouse makes it ideal for structural support

Vilka [71]

Cellouse is ideal as a structural material since it’s fibers give strength and toughness to a plants leaves , roots and stems

6 0

3 years ago

Read 2 more answers

Which functional group typically has a negative charge at the ph of the cell?

Svetllana [295]

A phosphate group is a functional group that typically has a negative charge at the pH of the cell.

Phosphate groups contain a negative charge at physiological cell pH.

DNA nucleotides are composed of a phosphate group, thereby exhibiting a negative charge.

The phosphate group is also fundamental in Adenosine triphosphate or ATP (the energy coin of the cell).

In conclusion, a phosphate group is a functional group that typically has a negative charge at the pH of the cell.

Learn more in:

brainly.com/question/11442354

3 0

3 years ago

IMAGE ABOVE ITS REALLYYY EASY FOR OTHERS PLEASE HELP ONLY A SMALL PARAGRAPH OR LESS

sattari [20]

It can change but inter fearing with each other

6 0

4 years ago

The diatoms below are magnified 400x. To find the total magnification while looking under a microscope, you must multiply the po

barxatty [35]

Answer:

ll living things are composed of cells. This is one of the tenets of the Cell Theory, a basic theory of biology. This remarkable fact was first discovered some 300 years ago and continues to be a source of wonder and research today. Cell biology is an extremely active area of study and helps us answer such fundamental questions as how organisms function. Through an understanding of how cells function we can discover how human ailments, such as cancer and AIDS, can be possibly treated.

THE CELL THEORY

All life is composed of cells

Cells are the fundamental units which possess all the characteristics of living things

New cells can only come into existence by the division of previously existing cells

Notice that this scientific concept about life is called a theory. In science, unlike the layman’s definition, the word theory is used for a hypothesis about which there is a large body of convincing evidence. Under experimental conditions all observations have thus far confirmed the theory. The evidence that helped formulate the theory was obtained using the microscope. The microscope is of enormous importance to biology and has extended our ability to see beyond the scope of the naked eye.

When we look at cells under the microscope, our usual measurements fail to work. In science, the metric system is used to measure objects and, as you will see, is vastly superior to our antiquated English system of measurement. Here are the basic units:

Length Volume Weight

1 meter (m) 1 liter (L) 1 gram (g)

1 millimeter (mm) = 0.001 m or 10−3 m or 1/1,000 m 1 milliliter (ml) = 0.001 L or 10−3 L 1 milligram (mg) = 0.001 g or 10−3 g

1 micrometer (mm)= 0.000001 m or 10−6 m or 1/1,000,000 m 1 microliter (ml) = 0.000001 L or 10−6 L 1 microgram (mg) = 0.000001 g or 10−6 g

1 nanometer (nm)= 0.000000001 m or 10−9 m or 1/1,000,000,000 m

There is also a different scale for temperature: Celcius.

100˚ Celcius (C) = water boiling (equivalent to 212˚ F)

0˚ C = water freezing (equivalent to 32˚ F)

Converting between units can be confusing. The most effective way to do this is by using conversion factors and canceling units. For example, if you want to know how many liters are in 425 milliliters, you can set up a simple equation that looks like this.

[latex]\displaystyle{425}\text{ ml}\times\frac{1\text{ liter}}{1000\text{ ml}}=\frac{425\text{ ml}}{1000\text{ ml}}=0.425\text{ L}[/latex]

PRACTICE

1.2 mm = ________ mm 0.224 m = ________ mm 225 nm =___________mm

0.023 L = ________ ml 750 ml = _________L 50 ml =___________ L

Part 1: Microscope Parts

Nikon microscope with parts labelled. The compound microscope is a precision instrument. Treat it with respect. When carrying it, always use two hands, one on the base and one on the neck.

The microscope consists of a stand (base + neck), on which is mounted the stage (for holding microscope slides) and lenses. The lens that you look through is the ocular (paired in binocular scopes); the lens that focuses on the specimen is the objective.

Your microscope has four objectives of varying magnifications (4x, 10x, 40x, and 100x) mounted on a revolving nosepiece. The 100x objective is a special oil immersion objective that needs to be used with oil—we won’t use the oil immersion objective for this course.

Positioning the specimen requires that you turn the mechanical stage controls, which operate the slide bracket on the surface of the stage. One control moves the specimen in the x-direction, and the other moves the specimen in the y-direction.

Focusing on the specimen is achieved by knobs that move the stage up and down, so that it is closer or farther from the objective. There are two knobs, an outer coarse focus and an inner fine focus.

The substage condenser directs light through the slide into the objective. An iris diaphragm on the substage condenser controls the amount of light reaching the objective, and also affects the contrast of the specimen.

Part 2: Magnification

The compound microscope has two sets of lenses; the ocular lens (or eye piece) which magnifies an object 10 times its normal size, and the objective lenses located on a revolving nosepiece. Rotate the nosepiece and notice how each objective lens clicks into place. Each objective lens has a different magnification of power written on it (such as 4, 10, 40, or 100). This number is the power of magnification for each of the objective lenses. For total magnification multiply the ocular power (10x) times the objective lens that is in place. For example, if you have a 10x ocular and a 10x objective, the total magnification is: 10x × 10x = 100x.

8 0

3 years ago