Which animal phylum was the first to develop a dorsal nerve cord a backbone?

Answers

Answer 1

Answer:

Chordates?

Explanation:


Related Questions

which organelle
produces the cells energy

Answers

Here is a Answer to your question:

Mitochondria

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

I am sorry if this was not helpful

Hope this was helpful

Answer:

Mitochondria

Explanation:

how do forensic scientists recover writing from a burned document?

Answers

The documents should be picked with the utmost care by placing hard paper underneath the charred documents. A stiff sheet of paper is stuffed underneath the charred documents in the fireplace and then gently pulled over to keep it on stiff cardboard.

Residents of an older building have children with a higher incidence of developmental delays. Which of the following is a possible cause of the developmental issues?

Old lead pipes are still used in the building.
Asbestos was not removed from the building.
The heating system is releasing carbon monoxide.
Pesticides were used in the building's landscaping.

Answers

Answer:

A

Explanation:

I took the test :)

Primitive lead pipes still in use in the construction may be the root of the building's developmental issues. So, the correct option is A.

What are Lead pipes?

Long lead pipes are recognised as the main source of lead in drinking water, lead service lines are the pipes that transport water from the underground water main to homes.

Remember that lead has been used in water pipes for thousands of years. Ancient civilizations picked lead for piping because it could withstand tiny leaks and was pliable enough to form into efficient water-delivery designs.

The development problems with the building may be caused by the outdated lead pipes that are still being used in the construction.

Thus, the correct option is A.

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What is the molarity of a solution that contains 800.26 grams of sodium nitrate, formula mass = 85.00 g/mol in 9.93 liters of the solution?

Answers

Answer:

0.948mol/litre

Explanation:

You find your moles(n)as=mass/molar mass

Then use Molarity=mole/volume to find the concentration

Spoil spider man mo way home for me

Answers

here you go

Aunt may dies

Define nondisjunction. Is this a beneficial process? Explain.

Answers

Answer:

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division (mitosis/meiosis). There are three forms of nondisjunction: failure of a pair of homologous chromosomes to separate in meiosis I, failure of sister chromatids to separate during meiosis II, and failure of sister chromatids to separate during mitosis. Nondisjunction results in daughter cells with abnormal chromosome numbers (aneuploidy).

Explanation:

First discovered enzyme is?

Answers

Answer:

The first discovered enzyme was Zymase. It naturally occurs in the yeast and helps in fermenting the sugar molecules producing carbon dioxide and ethanol.

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2) The rotational periods of four planets are listed in the table. Which of these planets has the SHORTEST day?

A) Earth

B) Jupiter

C) Saturn

D) Uranus​

Answers

Jupiter because if it has less hours than it has less days
jupiter because the day is only 10
hours long.

What is the relationship between the curve seen in the graph and the environmental health of the oceans?
An increased population will result in the improved environmental health of the oceans due to more scientists inventing better technologies.
An increased human population size means that the ocean's resources will be used more efficiently.
As the population goes up, the oceans are more likely to be used as a habitat for humans.
As the population increases, more demands are put on the ocean to support human life.

Answers

Answer:

As the population increases, more demands are put on the ocean to support human life.

Explanation:

Many countries rely on the ocean for transport and as food sources. Over fishing has continuously been a growing problem as more and more fish are required to sustain populations as well as support more gourmet markets. A higher population will also lead to higher trade rates as more materials that aren't available in one country will need to be imported from others.

Which statement could be categorized in the overlapping section of the Venn diagram?

Answers

Answer:

The statement that could be categorized in the overlapping section of the Venn diagram would be option A. All the statements given above are about the aerobic and anaerobic respiration. The Venn diagram is used to show the similarities and differences between the two. The overlapping section of the diagram shows the similarity and it "uses pyruvate or pyruvic acid".

Explanation:

hope this helps

Answer:A and D are correct.

Explanation:

Which of the following describes a limiting factor of population size?

Birth rate
Death rate
Available land
Gestational period

Answers

Answer:

death rate

Explanation:

As death rate increases there's decrease in population

Which cells reduce cell mediated immune response?

Answers

Answer:

Regulatory T cells (Tregs), either natural or induced, suppress a variety of physiological and pathological immune responses

how does urbanization affect your life and the area in which you live

Answers

Answer:

Population growth, lack of supplies

Explanation:

Urbanization can impact an area, especially population growth. People could be crowded, and that supplies could run out as it is an urbanized region.

Which material would most likely contribute to the formation of humus?

A.
basalt

B.
granite

C.
grass

D.
salt

Answers

Answer:

Encyclopedic entry. Humus is dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs, and other material to the ground, it piles up.

Identify the plant phylum based on the description.
A tree that can be found in the mountains and produces seeds in cones is a type of
A tree that produces blossoms that can be fertilized and develop into fruit is a type of
This low-lying plant that requires damp surfaces and does not have a system to transport water is a

Answers

A tree that can be found in the mountains and produces seeds in cones is a type of gymnosperm.A tree that produces blossoms that can be fertilized and develop into fruit is a type of angiosperm. This low-lying plant that requires damp surfaces and does not have a system to transport water is a bryophyte.

How are plants classified?

Plants are a group of living organisms that belong to the kingdom Plantae.

They possess certain characteristics that distinguishes them from one another, hence, subdivision into phylum.

The Phyla of Kingdom Plantae are as follows:

Bryophyta: They are regarded as primitive plants with no mechanism for transporting water or nutrients.Angiosperms: They are regarded as flowering plants because they possess flowers that become fruits when fertilized.Gymnosperms: They are higher plants that do not produce fruits i.e. they bear their seeds in cones.

Therefore, the correct placement of each description is as follows:

A tree that can be found in the mountains and produces seeds in cones is a type of gymnosperm.A tree that produces blossoms that can be fertilized and develop into fruit is a type of angiosperm. This low-lying plant that requires damp surfaces and does not have a system to transport water is a bryophyte.

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Answer:

conifer, flowering plant moss

Explanation:

justtook assignment

Why do you think ideas and cultures are exchanged along with physical products?

Answers

Answer:

ideas and cultures are exchanged for a number of reasons, i'll list a few.

1) some people, and cultures, love to try and shove their religion on others because they think there's is the best. so religions could be spread this way.

2) with so many things going on in the trade process, sombody eventually thinks that somthing that Another Country is doing is going to help them out in a personal or finacial way and they adopt that for their own personal use.

3) you can research some more yourself, i just took a test on this and it took me a while to find the stuff, most people don't like helping with things like this.

Since self-driving cars have software that may potentially make life-or-death decisions, who must utilize ethical principles to judge those decisions? Select 2 options.
manufacturers who make the body of the car
governments who regulate the car industry
no one since the artificial intelligence software mimics human behavior
transportation departments that make the roads
the programmers who create the software that control the car

Answers

The utilization of ethical principles to judge the decisions are: no one, since the artificial intelligence software mimics human behavior, the programmers who create the software that control the car.

What are self-driving car?

Self-driving cars are the autonomous vehicles. These cars don't need a driver. These cars will run by themselves.

These cars are not launched currently, but work is in progress, self-driving cars will sense the people and any obstacle by the sensors.

Thus, the correct option is C, no one since the artificial intelligence software mimics human behavior and E, the programmers who create the software that control the car.

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Answer:

the programmers who create the software that control the car

governments who regulate the car industry

Explanation:

A coastal region has a warm climate, but tourism to the area is focused on fishing rather than swimming at the beach due to cold ocean water. Which ocean movement and result likely cause this type of environment?

Answers

Upwelling is the type of ocean movement which will result likely in this type of cold environment.

What is Upwelling?

This is a process in which deep, cold water rises toward the surface and usually contain a higher concentration of nutrients.

Swimming at the beach due to cold ocean water is as a result of the process of upwelling.

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Eukaryotic cells, when compared
to prokaryotic cells, tend to be
which of the following?
A. smaller, but specialized
B. larger and more complex
C. larger, but simpler
D. smaller and simpler

( b )

Answers

Answer:

B. larger and more complex.

A Gram + bacterium that inhibits the growth of other Gram + bacteria is an example of what?

Answers

Answer:

The selenium particles when coated on paper towels were extremely effective and continuously inhibited (about a 90% reduction) the growth of gram-positive bacteria including S. aureus and S. epidermidis after 24, 48, or 72 hours.

What happens when a piece of DNA is missing?
A.)Genetic information is transmitted
B.)Genetic information is lost
C.)Genetic information is copied
D.)Genetic information is stored

Answers

Answer: Genetic information is lost. Genetic information is transmitted.

Explanation:

why is it beneficial for scientists to understand how other organisms are able to edit their RNA

Answers

Answer:

Many see RNA editing as an important alternative to DNA editing using techniques such as CRISPR.

Explanation:

It is beneficial for scientists to understand how other organisms are able to edit their RNA because it gives an idea for scientists in order to identify particular causes and symptoms of genetic and environmental disorders among individuals.

What is RNA?

RNA stands for ribonucleic acid. It may be characterized as a type of nucleic acid that is significantly present in all living cells. It expresses some structural and functional similarities to DNA. There are major three types of RNAs found. It includes mRNA, tRNA, and rRNA.

There are various techniques that help scientists to observe numerous RNA and its editing in organisms. It is an important alternative to DNA editing. This methodology of RNA editing and functionality is determined by using techniques such as CRISPR.

Therefore, it is beneficial for scientists to understand how other organisms are able to edit their RNA because it gives an idea for scientists in order to identify particular causes and symptoms of genetic and environmental disorders among individuals.

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What is an example of a population with the ingredient for species? Would it be evolution?

Answers

All members of a species that dwell in the same region are referred to as a population. You are a member of your hometown's human population. A freshwater pond is home to a variety of species, including mallard ducks and cattail plants growing on the pond's border. Basically, a population is a collection of individuals of the same species that live in the same geographic region and interbreed. Many animals have several populations that are spread across a wide range of geographic locations.

Most organisms cannot live in temperatures:

below 50°C
above 0°C
above 50°C

Answers

Answer:

Your answer would be:
C.) Below 50°C


Explanation:

Most organisms cannot live in conditions in which the temperature remains below 0 °C or above 45 °C for any length of time. In conclusion, most organisms can only live in 0 °C to 45 °C environments.

Answer:

The correct answer should be below 50 degrees Celsius

Explanation:

I believe the guy above me is correct.

About how many genes do humans have?

A. 46

B. 80,000

C. 23

D. 1.3 million

Answers

Answer:

20,500

Explanation:

Protist that uses a flagella for movement

Answers

Answer:

Giardia

Explanation:

Why would a cancer cell need to induce angiogenesis? 1.53​

Answers

Answer:

Why is angiogenesis important in cancer? Angiogenesis plays a critical role in the growth of cancer because solid tumors need a blood supply if they are to grow beyond a few millimeters in size. Tumors can actually cause this blood supply to form by giving off chemical signals that stimulate angiogenesis.

·Why does it make sense that blood flow varies throughout different organs

Answers

It is important that blood flow varies throughout different organs because of differences in the metabolic activities of the different organs.

What is the circulatory system?

The circulatory system refers to the system of organs and tissues which are involved in the circulation of blood around the body.

The circulatory system performs the essential function of delivering nutrients to tissues and cells as well as removing metabolic waste from them.

Since the different organs in the body perform specialized functions, some organs are actively involved in metabolic activities, therefore need greater blood flow.

Therefore, blood flow varies throughout different organs because of differences in their metabolic activities.

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The relative abundance of species in an area is called

species evenness
species richness
clumped distribution
random distribution

Answers

Answer:

Species richness.

Explanation:

A common term, for organism populations.


Which taxonomic group will have organisms that share
the most

Answers

The Kingdom is the largest and most inclusive of the taxonomic categories. Species is the smallest and least inclusive of the taxonomic categories.i think-
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