2. Jellyfish are one of the oldest species on Earth. In what time period did they first appear? A. Precambrian Time B. Paleozoic Era C. Mesozoic Era D. Cenozoic Era​

Answers

Answer 1

Answer:

A. Precambrian Time

Explanation:

Fossil evidence of jellyfish dates back to the Cambrian Period, 500 million years ago.


Related Questions

A reaction that absorbs energy from the environment a reaction that requires an activation energy a reaction that releases energy into the environment a reaction that does not involve a change in energy

Answers

Answer:

Endothermic reaction

Explanation:

An endothermic reaction is a chemical reaction that takes energy from the atmosphere. It requires activation energy.  An exothermic reaction is the reverse of an endothermic reaction. Reversible reactions are where the compounds will react to the initial reagents.

frank has type A blood (AA or AO) and margarita has type B (BB or BO) blood. They have a new baby. Vinnie, with type O blood. Is this possible or should frank accuse margarita of cheating?

Answers

Answer:

It is technically possible, if and only if, both parents have AO and BO blood.

Explanation:

the only way (most of the time) a child can get O blood is if both genes accepted by the parents are O.  That would mean both parents would have to have O recessive genes.

PLEASE HELP!!! Asapp

Answers

Answer:

B

Explanation:

Its the same

It’s B.................

Put the steps of Protein Synthesis below into the correct order.
4 points
Step 1
Step 2
Step 3
Step 4
A Protein
molecule is
produced
An mRNA
molecule is
produced
mRNA interacts
with a Ribosome
DNA interacts
with RNA
polymerase

Answers

Step 1: dna interacts with rna polymerase
Step 2: mRNA molecule is produced
Step 3: mRNA interacts with a ribosome
Step 4 protein molecule is produced

The correct order is DNA interacts with RNA polymerase (1), the mRNA molecule is generated (2), mRNA interacts with a ribosome, and protein is produced (4).

What is transcription?

Transcription (gene transcription) is the process by which a fragment of DNA is employed to generate an mRNA.

This messenger RNA (mRNA) then travels to the ribosomes in the cytoplasm to generate a protein.

The process of translation refers to the protein synthesis by an mRNA template.

In conclusion, the correct order is DNA interacts with RNA polymerase (1), the mRNA molecule is generated (2), mRNA interacts with a ribosome, and protein is produced (4).

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Which scenario is an example of an environmental problem becoming an
economic problem?
O A. Excessive pollution decreases a community's access to affordable
clean water.
O B. Destruction of habitat reduces a population of animals in a remote
ecosystem.
O C. Deforestation creates farmland that allows a community to
produce more crops.
O D. Excessive manufacturing of a product reduces demand in a
saturated market.

Answers

Answer: A, excessive pollution decreases a communities access to affordable clean water.

Explanation: ap3x

Answer:

O A. Excessive pollution decreases a community's access to affordable

clean water.

Explanation:

Above answer is absolutely correct! I just want to assure you :)

Why is it important for the new cell that the two new double helices are identical to each other?

Answers

DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. All these cells, the parent cell and the two new daughter cells, are genetically identical. ... The two single strands of DNA then each serve as a template for a new stand to be created.

Which of the following is not a function of the skeletal system?
A.
provides a framework for the body
B.
provides protection for internal organs
C.
movement of bones
D.
production of new blood cells

Answers

Answer:

C

Explanation:

The skeleton relies upon the contraction and relaxation of muscles which are attached to bone in order to move. The muscular system is made up of three types of muscle, one of which is responsible for the movement of bone. To add to the confusion, the relationship between both muscles and bones is often lumped together as the musculoskeletal system, but to be sure, they are unique in their own ways.

In summary, bones can't move on their own, and therefore movement cannot be the skeletal system's function.

Some cells contain two copies of each chromosome, and some cells contain only one copy of each chromosome. Which types of cells contain two copies of each chromosome?

Select all that apply.
A. egg cell
B. skin cell
C. body cell
D. blood cell
E. sperm cell

Answers

Body cell and sperm cell

The type of cell that  contain two copies of each chromosome should be considered as the sperm cell and the body cell.

What is a chromosome?

It is considered as the thread-like structures that should be located inside the animal or plant cells nucleus. Each and every chromosomes should be made of protein and the individual molecule of DNA.

Therefore, The type of cell that  contain two copies of each chromosome should be considered as the sperm cell and the body cell.

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What are all of the functions of water in the body? (Nutrition Lesson)

Answers

Answer:

Protects body organs and tissues. Carries nutrients and oxygen to cells. Lubricates joints. Lessens burden the on kidneys and liver by flushing out waste products.

Explanation:

10. In a bacterial cell, which structure allows the cell to move through fluid?
A flagella
B pili
C nucleoid
D ribosomes

Answers

Answer:

a, flagella. they allow cells to swim

A. Flagella vuvvuvugivivufxyyfyx

HELPPPPPP.......30 points DONT ANSWER IF YOU'RE NOT GOING TO HELP I WILL REPORT YOU
The image shows a lake, a factory, a cloud in the sky, a cow, dead organisms, a tree, and the sun. An arrow from the sun to the tree is labeled A. An arrow from the sky to the tree is labeled B. The sky is labeled C above the cloud. The letter D is in the air and an arrow points from it down to dead organisms. An arrow points from dead organisms to the ground labeled E. An arrow points from the cow into to the sky labeled F. An arrow points from the factory to the sky labeled G. An arrow from the sky to the lake is labeled H above the lake.


Using the diagram above, match the description to the corresponding location in the carbon cycle model. Provide the letter only.

Carbon dioxide is converted to sugar used for food.
Carbon trapped in fossil fuels is converted to carbon dioxide.
Organic carbon is converted to fossil fuels.
Carbon dioxide is converted to carbonates.
Sugar is broken down and converted to carbon dioxide.
Location ________
Location ________
Location ________
Location ________
Location ________

Answers

Answer:

A - 1. Carbon dioxide is converted to sugar used for food (this is process of phosynthesis).

G - 2. Carbon trapped in fossil fuels is converted to carbon dioxide (this is combustion of fuel).

E - 3. Organic carbon is converted to fossil fuels.

H - 4. Carbon dioxide is converted to carbonates.

F - 5. Sugar is broken down and converted to carbon dioxide (this is breathing).

Explanation:

hope this helps

Under identical conditions, which surface will reflect the greatest amount of insolation?

Answers

Answer:

Earth's surface

Explanation:

Will be receiving the greatest amount of isolation

When an instruction for a variation of a trait is not shown in by the organism, but the organism carrys it and can pass it on to the next generations, these organisms are called _______.

a
dominant
b
carriers
c
recessive
d
holders

Answers

Answer:

b. carriers

Explanation:

Recessive alleles do not create a phenotype if a dominant allele is present BUT the organism itself is called a carrier because it carries the recessive trait.

C) recessive hope this helps

Water is a
compound. How do these images of water illustrate
this? Provide evidence to support the claim. Explain
your reasoning

Answers

Answer:

Is made up of different kinds of atoms chemically combined.

Explanation:

This is a astronomy true or false question.
True or false: constellations represent physical connections between
their stars.

Answers

Answer:

true

Explanation:

Answer:

True

Explanation:

Hope it helps!!

How could flying squirrel adapt further to allow it to be more successful?

Answers

Answer:

The structural adaptations of the flying squirrel has developed a good sense of balance, sail-like fur skin membrane that extends from the wrists to ankles, delicate wrist bones that control this membrane, allowing the squirrel to steer, and a fluffy tail that balances out and stabilizes the flight.

How does a fungus get food?

Question 1 options:

both autotroph and heterotroph


Neither. It doesn't eat!


autotroph


heterotroph

Answers

Answer:

They are Heterotroph as they cant make their own food and have feed of dead things of decomposing.

How does the process of DNA replication impact mutations in an individual?
a All DNA replication stops when there is a mutation so the mutation wont hurt the individual
b Replication only produces new DNA strands so the old stand with the mutation is destroyed

c Since replication keeps the old strands as templates mutations maybe earned into future stands
d Mutations are often lost since the cell will die doring the replication process if the DNA is mutatie.​

Answers

Answer: A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.

Explanation:

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