The endomembrane system of eukaryotic cells is a transportation system inside plant and animal cells.
It consists of the nuclear membrane, rough and smooth ER the Golgi apparatus, and vesicles.
Ribosomes which are protein factories of the cell can be found on the rough er these ribosomes create proteins and then transfer these proteins into the ER where they undergo modifications, such as folding. These modified proteins may be absorbed into the membrane of the Er or packaged into a vesicle that may travel to the Golgi apparatus.

The Mohs scale of hardness explained. How can I determine the hardness or the ability to resist scratching of this mineral?
It is the Mohs scale to the rescue. The Mohs scale has ten minerals that increase in hardness. Talc is a number one and is the softest and diamond is the hardest.
This scale can be used to identify minerals.

Additional information
http://www.moomoomathblog.com/....2020/04/the-mohs-sca

ER structure and function

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Scientific names.
Let’s look at the scientific name of several common organisms.
Scientific name of a cat = Felis domesticus
Scientific name human = Homo sapien
Scientific name of a dog = Canis lupus familiaris


What does a scientific name tell us?
The name is a two part name. A fancy word for this is called “ binomial nomenclature.”
The first part of the name is the Genus and the second part is the species domesticus.

Humans belong in the genus Homo and the species sapien.

A cat would belong to the genus Felis, and the species
domesticus.
Plant-based names would follow the same rules when creating a scientific name for plants.

Resources for binomial nomenclature:
What is binomial nomenclature
https://www.reference.com/scie....nce/binomial-nomencl

Binomial nomenclature examples
http://study.com/academy/lesso....n/binomial-nomenclat

Scientific name cat and other animals
http://study.com/academy/lesso....n/binomial-nomenclat

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You may have to wear glasses. How do they work? When you are farsighted ( hyperopia) objects far away are clear but object close appear blurry. This type of problem can be fixed with a convex lens. A concave lens is used to fix the opposite problem created when you are nearsighted.
Transcript
http://www.moomoomathblog.com/....2020/09/how-glasses-

Zinc is an essential mineral required by your body. These 10 foods can help you maintain your daily allowance of zinc.
Beef
Lamb

Shiitake Mushrooms

Milk/ Yogurt

pumpkin seeds

Spinach

Garbanzo beans

Cashews

Quinoa

Oysters

Learn the difference between potential energy which is stored energy and kinetic energy which is the energy of motion. In this video, I compare gravitational potential energy to kinetic energy. I also review the formula for potential energy and the formula for kinetic energy.

For more Math help visit our website
http://www.moomoomath.com/

Potential Kinetic Energy
https://moomoomath.com/potenti....al-energy-vs-kinetic

Bill Gates has a net worth of around 93,000,000,000 dollars.
This is a large number to write.
A nanometer is 1/ billionth of a meter which is written as 0.000000001 m

Both of these numbers can be written using scientific notation.
Bill Gates net worth could be written as 9.3 x 10^10
A nanometer can be written as 1.0 x 10^-9
Lets go over the basics of scientific notation

9.3 x 10^8
The coefficient must be between 1 and 10
The exponent should be an integer and can be positive of negative

If you have to move the decimal to the left , the exponent will be positive
If you have to move the decimal to the right the exponent will be negative

530,000 5.3×10^5
First example. In this example we do not have a decimal so you can assume it is after the last zero. The coefficient must be between 1 and 10 so we need to move the decimal five places to the left because 5.3 is between 1 and 10
The exponent will be positive so it will be written as 5.3 x 10 5

.00078 x 10^-4

In this example in order for the coefficient to be between 1 and 10 we need to move the decimal four places to the right 7.8 is between 1 and 10
We need to move the decimal to the right so the exponent will be negative

The scientific notation will equal 7.8 x 10^ -4

x-linked inheritance and male pattern baldness.
An x-linked trait which is a sex linked trait is a trait found on the x chromosome.
Females have two x chromosomes and males have an x and a y chromosome.
The x chromosome has almost 800 genes compared to only around 70 found on the y chromosome.

Let’s look at the Punnett Square for another x-linked disease, hemophilia
In this example, the father has the disease and the mother is a carrier.
With a recessive x-linked disease a female can be a carrier
Have the disease, or not have the disease.
Males can only have the disease or not.
Let’s go back to the Punnett square and their offspring.
This female is a carrier, this female has the disease, this male has not inherited the disease and this male has hemophilia.
Notice the Punnett square works similar to a monohybrid cross except the y is neither dominant or recessive. I will call the y chromosome neutral
Because males either have the disease or not, they have a greater chance of inheriting an x-linked trait.
So there you go, traits found on the x chromosome.

Divergent plate boundaries occur when two tectonic plates move away from one another.
Divergent plate boundaries are considered constructive boundaries.
If you look at a map of the major tectonic plates you can see several divergent plate boundaries.
There are two major types of divergent boundaries.
Continental and continental lithosphere and oceanic and oceanic lithosphere.
An example of an oceanic and oceanic divergent boundary is the mid-ocean ridge.
The mid-ocean ridge runs around the world including going right through Ice land.
A famous example of a continental and continental divergent boundary is the African rift valley.

Difference between angiosperm and gymnosperm plants.
Angiosperms are flowering plants.
Their seeds are enclosed in a protective covering called fruit.
Gymnosperms have a naked seed and many are cone bearing trees.

You may enjoy
Parts of a flower crossword puzzle
http://www.moomoomath.com/flow....er-parts-crossword-p
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A spider looks like an insect, but a spider is not considered an insect.
A spider is an arachnid and is similar to an insect but also different.
Spiders have two body regions, eight legs, no wings or antennae compared to insects.
Are spiders bugs? No, but they have several similar characteristics

Learn how to listen effectively in class. The ability to listen effectively is an important skill to learn and can help improve your grades.
Practice these four areas in order to improve your ability to listen in class
Set up your environment
Choose to listen
Be prepared
Actively listen

Student Success-How to listen effectively in class
http://www.moomoomath.com/stud....ent-success-listenin

Keywords: Boost your grades, How to make A's, active listening, how to take notes
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As the moon rotates around the earth it travels through phases.
The alignment of the sun, earth, and moon create the phases.
I use an orrery to explain the moon's alignment during,
new moon, waxing crescent, ist quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent, and back to new moon.
The sidereal period is 27.3 and the moon is measured against stars.
The synodic period is 29.5 days and the moon is measured against the sun.
You may also enjoy

Rotation and Revolution of the Earth with an Orrery
https://youtu.be/-iztiJz7SJQ

Phases of the moon with pictures.
https://moomoomath.com/phases-....of-moon-explained-us

Gravity depends on mass and distance and is an attraction between objects with mass.

Why does the same side of the moon always face the earth?
Because of the orbit of the moon and its rotation are almost the same the near side of the moon always faces the earth. The orbit of the moon is elliptical and has a slight tilt.

Moon Information
https://moomoomath.com/phases-....of-moon-explained-us

What is the difference between bacteria and archaea? Although they may seem to be the same,these two groups of organisms are different.

More Information
http://www.moomoomathblog.com/....2021/02/the-differen

Bacteria Cell Structure
https://moomoomath.com/bacteria-cell-structure/

In this video, I'd like to talk about the difference between a solar and lunar and discuss different types of eclipses. As the moon orbits the Earth its position changes and may block the sun.
eclipse, when the shadow of one celestial body like the moon or the earth falls on another an eclipse, occurs.
A solar eclipse happens when the moon comes between the earth and the sun and the shadow of the moon falls on part of the
earth a lunar eclipse happens when the earth comes between the Sun and the moon
and the shadow of Earth falls on the moon.
I show a diagram of a partial solar eclipse, total solar eclipse, and an annular eclipse.
In addition, I diagram the types of shadows, umbra, penumbra, and antumbra.
Finally, I diagram the different types of Luna eclipses, penumbral, partial lunar eclipse, and a total lunar eclipse.

Learn all about Igneous rocks which are produced from molten rock. Igneous rocks can be divided into two major types, intrusive and extrusive. Intrusive rocks are formed inside the Earth from molten rock. Intrusive rocks can have large crystals and a coarse texture. Extrusive rocks are formed from lava and will have small crystals and a fine texture.
I also show examples of igneous rocks including, obsidian, basalt, and rhyolite.

Rock Cycle
http://www.moomoomathblog.com/....2020/04/rock-cycle-d
Rock vs Mineral
https://youtu.be/K4njYczM0qE

In this video, learn about the biome called the taiga. This biome is also called the coniferous forest or the boreal forest.
The taiga is found in the north and has very cold temperatures.
You will find moose,reindeer, and brown bear.

Longitudinal waves are waves in which the displacement of the medium is in the same direction as, the direction of propagation or movement of the wave. In other words, the displacement of the medium is parallel to the propagation of the wave

Longitudinal waves are also called compressional or compression waves, because they produce compression and rarefaction when traveling.
I also cover compressions and rarefactions.

In this video, I cover the difference between mechanical waves and electromagnetic waves. Mechanical waves need a medium in order to transport energy and electromagnetic do not.

English
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Spanish
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Portuguese
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For more Math help visit our website
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Law conservation mass word problems.
In the video, I show two types of law of conservation word problems. The first problem involves counting atoms and the second problem involves finding the mass of the reactants and the products.
Example problem:
How much oxygen would add with 36g of carbon to give 136g of carbon dioxide?

Savanna- Biomes of the world.
The savanna is a type of biome with large stretches of grasslands mixed with trees and shrubs. It is a mix between a tropical forest and a temperate grassland
Savannas have warm temperatures year round. There are actually two very different seasons in a savanna; a very long dry season in the (winter), and a very wet season in the (summer). In the dry season, a savanna may only receive 4 inches of rain
The dry season is between December and February and occasional fires may occur.
In the summer it will rain often and will this biome may have 10 to 25 inches of rainfall.

Savannas are located in Africa, Brazil, India, and Australia
The savanna we are most familiar with is the East African savanna. This savanna is dotted trees and shrubs. The Serengeti Plains of Tanzania are some of the most well known. Here animals like lions, zebras, elephants, and giraffes are found
Many animals in the savanna have the ability to migrate.
Many types of grasses exist in the savanna and this biome is known for acacia trees and. Baobab trees.

You may also enjoy ......
Introduction to Biomes
https://youtu.be/cXo9YczQBo4

Components of blood and their functions
Learn about the major components of the blood
Your blood is made of,
red blood cells, white blood cells, plasma, and platelets
Red blood cells carry oxygen
White blood cells fight germs
Plasma carries electrolytes and hormones.
Platelets clot the blood
Resources for Blood
White Blood Cell
https://en.wikipedia.org/wiki/White_blood_cell
Your blood
https://www.youtube.com/watch?v=CRh_dAzXuoU

Parts of blood
https://www.youtube.com/watch?v=R-sKZWqsUpw
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