Which of the classifications for humans means that we have a hollow nerve chord?A) Class
B) Kingdom
C) Order
D) Phylum

Answers

Answer 1

Answer:

Answer: Phylum

Explanation:

A notochord can be defined as the beginning to the backbone which is primitive. It appears in the embryos as a flexible rod which is made from the germ layer called as mesoderm.

It is one of the 3 layers that is found in the body. These layers are ectoderm, endoderm and mesoderm.

Notochords are only found in the phylum chordata. This phylum belongs a group of animals which includes human.

Answer 2

Answer: Humans are phylum i believe

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If an orange is orange, why isn't a lime called a green or a lemon called a yellow?

Answers

A lime is called a lime because it's lime in colour and a lemon is called lemon because it's lemon in colour. Just to change the subject slightly why is a fly called a fly? - because it flies - so if a fly didn't have wings would it be called a walk. We could go on and on with this couldn't we and have a lot of fun too :)

Which statement is true for all minerals? A.
They have a crystalline structure.

B.
They contain useful metals.

C.
They are made of silicon and oxygen.

D.
They are too hard to be scratched with a nail.

Answers

A. because atoms create crystal structures to form different kind of materials

d
C.
They are made of silicon and oxygen

An 80 kg long jumper in flight accelerates at a rate of 10 m/s^2. What is the force of the long jumper

Answers

Answer:

F = 800 N

Explanation:

Given data:

Mass = 80 Kg

Acceleration = 10 m/s²

Force = ?

Solution:

Formula:

F = m × a

F = force

m = mass

a = acceleration

Now we will put the values in formula:

F = m × a

F = 80 kg × 10 m/s²

F = 800 kg.m/s²

kg.m/s² = N

F = 800 N

Based on their electronegativities, you would expect ____ elements to pull on electrons more strongly than ______ elements.

Answers

Answer:

I interpret the answers as being nonmetallic and metallic.

Explanation:

Nonmetals are in groups 14 - 18. Electronegativity is referred to as the want to attract electrons to an atom. Noble gases (group 18) have eight valence electrons in their outer subshells and are therefore atomically stable. Elements with only 7 valence electrons are very electronegative because they desire to obtain an electron to reach stability more than a group 2 element would (they are more likely to drop electrons by giving away in order to reach atomic stability of a group 18 element). This coincides with electron configuration, which is a very lengthy topic to cover. You can conduct more research if you would need it.

Name 3 some sources of CO2

Answers

Natural sources include decomposition,ocean release and respiration.

Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal,oil and natural gas.

Final answer:

The three primary sources of carbon dioxide (CO2) in the atmosphere are the respiration of organisms, the burning of fossil fuels, and deforestation or land use changes.

Explanation:

Carbon dioxide (CO2) is a type of gas that naturally exists in the atmosphere. It is primarily released from three key sources, which include:

The three primary sources of carbon dioxide (CO2) in the atmosphere are the respiration of organisms, the burning of fossil fuels, and deforestation or land use changes.

The three primary sources of carbon dioxide (CO2) in the atmosphere are the respiration of organisms, the burning of fossil fuels, and deforestation or land use changes.

Yet due to human activities like industrialization and deforestation, the amounts of CO2 in the atmosphere have been increasing at an unprecedented rate, leading to global climate change.