Jawless fish were Earth's first

Jawless Fish Were Earth's First

Answers

Answer 1

Answer:

jawless fish were earth 's first arthropods


Related Questions

Which of the following best represents the purpose of fertilizers?

Answers

Answer:

Fertilizer, natural or artificial substance containing the chemical elements that improve growth and productiveness of plants. Fertilizers enhance the natural fertility of the soil or replace the chemical elements taken from the soil by previous crops.

What stage of photosynthesis uses
carbon dioxide to make glucose?
A. Light reactions
B. Calvin Cycle
C. ATP synthesis
D Cellular respiration

Answers

Answer:

light reaction because glucose is a factor of sugar.

Which of the following processes takes place in the ribosomes of a cell?
O A. Transcription only
O B. Translation only
O C. Transcription and translation
O D. Replication only

Answers

Answer:

B.Translatiin only

Answer:

Option B Translation only

Explanation:

Please Mark me brainlist

this type of cell is found in females and is needed for reproduction​

Answers

Answer:

egg cell

Explanation:

Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.

Gametes is the answer❤️

How would the sweat glands react when the temperature gets really cold? What about the hair follicles in your skin?

Answers

Your sweat glands would close.
The sweat glands would stop secreting sweat.
The hair erector muscles in the skin would contract causing the hairs on the skin to stand up (this may cause the appearance of goosebumps). The erect hairs trap a thin layer of air that acts as insulation against heat loss from the body to the environment.

Why do you think genetic orders do not completely disappear from the human population, even though there are great researchers and excellent health care? PLS HELP

Answers

Answer:

Because we have not yet figured out to successfully remove/change genes on a large scale. Once we do, genetic disorders will no longer be as prevalent.

Explanation:

Braintliest please.

a nucleotide consists of?
A.a phosphates sugar and a nitrogen base
B.a sugar and a nitrogen base
C.a phosphate, an amino acid and a nitrogen base
D.a sugar, a protein and uracil

Answers

Answer:

a

Explanation:

a nucleotide consists of a phosphates sugar and nitrogen base.

Why didn’t Darwin understand that genetics has passed on.

Answers

Answer:

Darwin did not know that DNA would become an important part of his Theory of Evolution. In fact, the subcategory of evolution called microevolution is completely based on DNA and the mechanism of how genetic information is passed down from parents to offspring.

Explanation:

DARWIN'S DIFFICULTIES WITH BLENDING INHERITANCE AND HIS THEORY OF PANGENESIS. Darwin failed to understand the significance of these results because he had no model of particulate inheritance that could be applied to genetic data.

PLEASE HELP! WILL MARK BRANLIEST!
Carbon Dioxide trapped in the atmosphere causing the Earth to become is called the ___:

A. global warming, B. greenhouse effect, C. botanical gardens effect

Explain why.

Answers

Answer:

b.greenhouse effect

Explanation:

Trap heat similar to the glass roof of a greenhouse.These heat-trapping gases are called greenhouse gases

Answer:

B. Greenhouse effect

Explanation:

What is the greenhouse effect?

planets

Credit: NASA Jet Propulsion Laboratory.

The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.

What is the name of the organelle labeled with the letter A?
A
B
o
ה ס ד ה I
N
M
к
Animal cell

Answers

Answer:

the label letter A is lysosome

Describe movement of molecules to maintain a healthy cell environment. Explain in details

Answers

Answer:

Very necessary for its survival.

Explanation:

Movement of molecules is very important to maintain a healthy cell environment because some molecules are required by the cell for its growth and development. Some molecules moves inside the cell environment through a semi-permeable membrane such as glucose, oxygen, potassium etc while on the other hand, some molecules are removed from the cell which are waste materials such as carbondioxide etc. If these waste materials are not removed from the cell, it greatly damaged the cell.

are all insects harmful?​

Answers

No, not all insects are bad. Insects get labeled as "pests" when they start causing harm to people or the things we care about, like plants, animals, and buildings. Out of nearly one million known insect species, only about one to three percent are ever considered pests.

Darwin hypothesized that new species could appear gradually through small changes in an ancestral species. What experiment did he conduct to test this hypothesis?

Answers

Answer:

Darwin conducted an experiment with breeding pigeons.

Explanation:

The pigeons provided the perfect animal to test his theory of selection for quite a number of reasons including its trait diversity from wing structures to color patterns to size to flight patterns. From these experiments he concluded that by natural selection of randomly occurring traits that make species better suited for survival and reproduction, evolve in the astounding diversity of organisms on Earth today.

(not my words)

Answer:

its b

Explanation:

What is the energy source in photosynthesis?

Answers

sunlight is the source of energy for photosynthesis.

Answer:

the sun

.................

Explain in at least five sentences what you've learned about how
global warming and climate change are impacting our Earth in different regions of the world.

Answers

Explanation: I'd first address the issue as a whole and explain the meaning and the general impacts of climate change, then use a variety of different places. For example, global warming causes the ice caps to melt in Antarctica. Then, explain how this has an impact on the environment meaning that polar bears could be in life-threatening situations and possibly even become extinct in the future which has a further impact on other animals in that food chain and ecosystem. This is just one example. You could also explain the unbearable heat in countries nearer the equator, which prevent crops from growing; the sea levels rising; or extreme weather events like huge flooding or heatwaves. It depends what you have learnt about in class, but I'm assuming it would be about this sort of thing.

Answer:

Higher death rates. ...

Dirtier air. ...

Higher wildlife extinction rates. ...

More acidic oceans. ...

Higher sea levels.

hope it helps

A Russian citizen has illegally obtained a Siberian tiger and is trying to sell the tiger’s fur in the United States. What treaty does this violate?
A.Tiger Treaty
B.Lacey Treaty
C.CITES
D.EPA

Answers

Answer:

Cites,

Explanation:

Another Answer on Brainly

The treaty that the Russian citizen violated is CITES or Convention on International Trade in Endangered Species. The treaty was drafted from 1973 in order to protect the over - exploitation of wildlives.

A Russian citizen has illegally obtained a Siberian tiger and is trying to sell the tiger’s fur in the United States, CITES treaty does this violate. Therefore, the correct statement is option C.

What is CITES?

CITES, or the Convention on International Trade in Endangered Species of Wild Fauna and Flora, is the treaty that this action would break. Since Siberian tigers are considered an endangered species, the Convention on International Trade in Endangered Species (CITES) regulates international trade in their parts or products.

A violation of CITES regulations is the illegal possession, sale, or transportation of an endangered species or its parts or products, like fur, without the necessary permits or documentation.

The Lacey Act is a US regulation that denies the exchange unlawfully got natural life, plants, and their items, yet refers to a worldwide settlement that oversees the exchange of jeopardized species across borders. The United States Environmental Protection Agency (EPA) is in charge of enforcing environmental laws.

Therefore, the treaty that this action would violate is CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora).

Learn more about the CITES here:

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*100 POINTS* | No Links, thank you in advance for your help.


Creating a new, sealed biosphere doesn’t have to cost millions of dollars. With little effort, you can create your own, small, enclosed bio-system. The following sketch is a schematic representation of such a project.


Name the divisions of the Biosphere above labeled:

A.
B.
C.


Describe at least three interactions between the living and non-living components of the Biosphere above:

1.
2.
3.

Answers

Answer:

1. The bottle itself is growing living plants from inside.

2. Because of the gravity pull between the lid of the cup and the water, the water is flowing through the bottom lid.

3. The bugs in the bottle are living inside an ecosystem that is not natural.

Explanation:

I hope that this helps, and I hope that you ace your assignment/quiz/test. This is from Edge correct? Because I think that I did this before...

Answer:

lithosphere

atmosphere

hydrosphere

A structural protein collagen sometimes has a mutation that can causes a condition in which bones are weak and break easily. Which of the following are components (monomers) of collagen?
a. Amino acids

b.Nucleotides

c.Fatty acids

d.Carbohydrates

Answers

is fatty acids have good day

A species is an organism that has different traits cannot______ with other organisms.

1) breed
2) evolve
3) exist
4) survive

Answers

Answer:

2 evolve

I hope your answer is correct

What causes the reaction rate to decrease as the reaction progresses?​

Answers

The concentration of the reactants decreasing causes the reaction rate to decrease as the reaction progresses?

Why do animals that are active at night tend to have trouble seeing in color?

Answers

Nocturnal animals have more rod cells in their eyes as compared to humans and other animals active during the day. These rod cells serve as light receptors and help them see in dim light.

Which of the following is not a concern associated with fossil fuel dependence?

A. global warming
B. rising prices
C. increased competition
D.increased development

Please select the best answer from the choices provided

Answers

Answer:

D. increased development

Explanation:

I compared answers with others and found out d is correct. trust me :)

What is the pancreas? What are the main secretions of the pancreas,which aids in digestion?​

Answers

Answer:

The pancreas is a large gland located behind the stomach, close to the first part of the small intestine.

Lipase that breaks down fats, Amylase that breaks down carbohydrates, Protease that breaks down proteins

Explanation:

what is an embargo? can someone give me an answer to this question? :))

Answers

Answer:

An embargo is a government order that restricts commerce with a specified country or the exchange of specific goods.

An embargo is usually created as a result of unfavorable political or economic circumstances between nations.

Answer: 1 : an order of a government prohibiting the departure of commercial ships from its ports. 2. : a legal prohibition on commerce. a trade embargo.

How many protons does a lithium atom have

Answers

How many protons does a lithium atom have? Answer 3
The answer is 3 protons

Which process produces diploid cells?
A. Mitosis

B. Meiosis

Answers

Answer:

the answer is: A

Explanation:

mitosis

Answer:

Mitosis produces 2 diploid cells.

What is the sequence of the mRNA that would be written during transcription of this piece of DNA?

Answers

Answer:

AUCUAG is the correct combination

Explanation:

replace every letter with its xorresponding base pair of mRNA where A=U, T=A , C=G


What is the name of a network of interconnected food chains showing the energy flow through an ecosystem?

Answers

Answer:

Food web

Explanation:

What are the phenotypes of an organism?
A. the organism's genes

B. the organism's physical traits

Answers

Answer:

A.

Explanation:

The term "phenotype" refers to the observable physical properties of an organism; these include the organism's appearance, development, and behavior. An organism's phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes.

Answer:

A. the organism's genes

Explanation:

The phenotypes of an organism are the genes carried by the organism.

"I don't get it. Why do I need to learn about meiosis to understand about variation in a species?" moaned Trina. How would you explain to her what the relationship is between the two?

Answers

Answer:

The cell division that halved the no. of chromosomes is the meiosis. The meiosis takes place during formation of gametes (eggs & sperms) in higher organisms. eggs & sperms posses only one chromosomes of each pair of chromosomal set. (2n➡️n).

When these gametes fuse to form the zygite, the chromosomes become n+n➡️2n again.

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