A hair consists of two parts: a follicle and a shaft

Answer:

That is C.) blastocyst. I hope this helps! :)

During pregnancy after fertilization, the embryo gets implanted in the uterine wall. So the correct option is D.

The embryo is the stage of an animal's early development when it is within an egg or a mother's uterus. When referring to an unborn person, the phrase is used up to the end of the seventh week after conception; starting with the eighth week, the term "fetus" is used.

When an ovum and a sperm unite to form a sexually reproducing organism, the outcome is a zygote, or fertilized egg, which goes through a series of divisions known as cleavages as it travels down the fallopian tube. A hollow ball known as a blastula is created by the cells following many cleavages.

In most animals, the blastula adheres to the uterine lining, causing the placenta to develop and begin supplying the developing fetus with nourishment from the mother. The yolk feeds the embryo in lower animals.

The embryo differentiates into three types of tissue through the process of gastrulation: the ectoderm, which produces the skin and nervous system; the mesoderm, from which connective tissues, the circulatory system, muscles, and bones develop; and the endoderm, which produces the digestive system, lungs, and urinary system.

Therefore the correct option is D.

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Answer:    The Andromeda galaxy

Explanation:

And that's going to happen someday! The Andromeda galaxy is currently racing toward our Milky Way at a speed of about 70 miles (110 km) per second. Ultimately, the two galaxies will collide and merge.

Andromeda Galaxy collide with the Milky Way in several million years. Thus option C is correct.

The Andromeda Galaxy (M31) which is the closest large galaxy to the Milky Way.

Around 4.5 billion years  both Andromeda Galaxy and the Milky Way may be collide and form a giant elliptical galaxy.

Andromeda consist of  14 dwarf galaxies, M32, M110, and M33 galaxy.

It is supposed to Andromeda is the largest galaxy in the Local Cluster and most massive due to more dark matter in milk way galaxy.  

Most of the astronomers use this Andromeda Galaxy to understand the origin and evolution of the galaxy.

This Galaxy called spiral galaxy has double nucleus, has massive stars, dust and one supermassive black hole hidden at the core region.

Thus option C is correct.

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Answer:

The carbon cycle, as the nitrogen cycle, occurs in all the spheres: Biosphere, Atmosphere, Geosphere and Hydrosphere.

Explanation:

Most Earth events involve interaction between multiple spheres. For example, rain is the movement of water (the hydrosphere) from the atmosphere to the lithosphere where it collects in lakes, rivers, or streams. Water is an important resource for inhabitants of the biosphere.

The Atmosphere-contains all the air in Earth's system. The upper portion of the atmosphere protects the organisms of the biosphere from the sun's ultraviolet radiation. It also absorbs and emits heat. This sphere is also where weather occurs.

The nitrogen cycle occurs in all the spheres and ecosystems. It passes through rocks, water, atmosphere, plants, etc.

In atmosphere and biosphere: Nitrogen is about 78% of the gases in the atmosphere an it’s a essential component of the living organisms. It enters plants through the microorganisms that convert this nitrogen into ammonia. After this conversion, the plants absorb this substance. It can pass to animals when they eat these plants. Then, when they urinate, bacteria convert ammonia to nitrogen again and it returns to the atmosphere.

Sources:

https://earthsphereslife.wordpress.com/2020/03/31/nitrogen-cycle/https://earthsphereslife.wordpress.com/2020/04/01/carbon-cycle-in-all-the-spheres/

Answer:

approximately chemical elements naturally occur on earth

Answer:

About 92 I believe

Explanation:

Answer:

Humans take a plant and grow it taking only its certain daughter plants to grow for its characteristics

Explanation:

The Short Answer:

To predict future climate, scientists use computer programs called climate models to understand how our planet is changing. Climate models work like a laboratory in a computer. ... Scientists use computer programs called climate models to understand how our planet is changing.

Answer:

Below! : )

Explanation:

What is biodiversity? Well, in simple terms, biodiversity refers to all the variety of life that can be found on Earth (plants, animals, fungi, and micro-organisms) as well as to the communities that they form and the habitats in which they live. But how is biodiversity connected to healthy ecosystems? Well, many factors can contribute to this question but  Biodiversity boosts ecosystem productivity where each species have an important role to play. With this in play we can see that it is healthy and keeps ecosystems safe.

I hope this helps! : )

Answer:

Endoplasmic Reticulum (E.R.) These structures are passageways from the nucleus that transport proteins through the cell. This organelle is the control center of the cell.

Explanation:

Hope this helps.

Answer:

chloroplast

Because of where and how it was made

Answer:

the number of radioactive atoms will be left after 30 seconds is

D. 8 EIGHT

Answer:

cell wall is absent in

human

butterfly

shark

Answer: Carbohydrates

Explanation:

Carbohydrates are the most abundant structural component present in plants and microorganisms. Most carbohydrates are present in polymers such as cellulose, starch, and hemicelluloses. Cellulose is a structural component of plants that is associated with hemicelluloses and lignin (Fig.

Answer: The main difference between potential and kinetic energy is that one is the energy of what can be and one is the energy of what is. In other words, potential energy is stationary, with stored energy to be released; kinetic energy is energy in motion, actively using energy for movement

Explanation:

hope helps

Answer:

what is it for?...........

Answer:

Yuohahe quakceuh onuesiac

Explanation:

Answer:

Louis Pasteur

Explanation:

Answer:

These causes include habitat modification and fragmentation, introduced predators or competitors, introduced species, pollution, pesticide use, or over-harvesting. However, many amphibian declines or extinctions have occurred in pristine habitats where the above effects are not likely to occur.

Explanation:

Answer: something that can not be alone it relies on the independable varieble

Explanation:

its depends on the conditions you put it through you HAVE to have an independable varable in order for their to be a dependant variable. so A i was leaning toward B tho

Answer:

1.525 g/mL

Explanation:

Density is calculated by dividing mass and volume

30.5 g / 20.0 mL= 1.525 g/mL

Answer:

Adding ice to a glass of water causes the temperature of the water to decrease because the thermal energy in the water causes the ice to melt. A grill gives off thermal energy by burning propane.

Answer:

The same atoms and subatomic particles can be found in both.

Answer:

D) The proof that cells only come from other cells

Explanation:

I took the test and got 100%

Answer: Covalent Bond

Explanation: A covalent bond occurs when electrons are shared between two atoms, in this case the hydrogen atom is sharing an electron with the oxygen atom, creating a strong covalent bond.

I hope this helps!

Answer:

1816

Explanation:

The earliest weather charts were made by collecting synchronous weather reports by mail. However, it was not until 1816 that German physicist Heinrich Wilhelm Brandes created the first weather maps, which were hand drawn and reconstructed from data collected in 1783.

Answer:

1816

Explanation:

The earliest weather charts were made by collecting synchronous weather reports by mail. However, it was not until 1816 that German physicist Heinrich Wilhelm Brandes created the first weather maps, which were hand drawn and reconstructed from data collected in 1783.

6 moles of carbon dioxide and water are used to synthesize 1 mole of glucose, in photosynthesis

6 CO2 + 6 H2O + Solar energy ----> C6H12O6 + 6 O2

Answer:

Organelles

Explanation:

Answer:

organelles

Explanation:

yeeeeeeeeeeee

Answer: more H2CO3 is made

Explanation:

Acidic water of the ocean creates instability in the ocean ecosystem.

If the acidity of ocean increases the corals can't build skeletons and the shellfish also can't build the shells which they need for protection.

Corals are particularly important because they provide homes for many other sea creatures so we can conclude that acidic water of the ocean creates instability in the ocean ecosystem.

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