What geological evidence could there be for the presence of an early ocean?

Select one:

a.
Marine sedimentary rocks can be dated back about 4 billion years.


b.
The iron contained in the rocks combined with the oxygen to form reddish iron oxides.


c.
Oxygen is needed to make ozone, a molecule made of three oxygen ions, O3.


d.
No animals would have been able to breathe in Earth's early atmosphere.

Answers

Answer 1

Answer:

i think the correct answer is D


Related Questions

An increase in the biodiversity of an ecosystem leads to an increase in its productivity.

True
False

Answers

Answer:

true

Explanation:

prove that Sin^6 ϴ-cos^6ϴ=(2Sin^2ϴ-1)(cos^2ϴ+sin^4ϴ) please sove step by step with language it is opt maths question ​ ​

Answers

Using basic identities in trigonometry....

What are the student’s observations and inferences before he starts his investigation?

Answers

Answer:

Hypothesis. A Hypothesis is an estimation of what might happen and the student's observation before moving on to investigate.

The following chart lists taxonomy classifications for seven organisms. Some have just one classification, while others have a subclassification. Which four classifications best match the classifications of your fossils? Research the classifications if you don’t know their characteristics.

Classification
Organism 1 Brachiopoda
Organism 2 Mollusca, Gastropoda
Organism 3 Arthropoda, Trilobita
Organism 4 Chordata, Actinopterygii
Organism 5 Pteridophyta
Organism 6 Nematoda
Organism 7 Ascomycota
Now complete the following table to explain your reasoning for the classification of your fossils.

Answers

After doing some research I got a close answer.

The table is correct except for the very first one being fossil A. I didn't get that one correct so don't use that one.

Answer:

Explanation:

Organism 1- Brachiopoda Fossil D

Organism 2- Mollusca, Gastropoda Fossil A 

Organism 3- Arthropoda, Trilobita Fossil C

Organism 4- Chordata, Actinopterygii none

Organism 5- Pteridophyta Fossil B

Organism 6- Nematoda none

Organism 7- Ascomycota none

For both clinical and cosmetic reasons, plastic surgeons inject substances into connective tissue underlying the skin epidermis. This plumps up areas deficient in soft tissue, and is used to reduce surgical scars or wrinkles, for example. Which normal connective tissue components are good candidates to be injected as fillers in this type of procedure

Answers

Answer:B.) collagen

C.) glycosaminoglycan

Explanation:

is mucous an enzyme or harmone​

Answers

Answer:

It's an Enzyme.

Explanation:

It is a viscous colloid containing inorganic salts, antimicrobial enzymes (such as lysozymes), immunoglobulins (especially IgA), and glycoproteins such as lactoferrin and mucins, which are produced by goblet cells in the mucous membranes and submucosal glands.

Using the Venn diagram (above) can you come up with some ways that the different perspectives
overlap? What do they all have in common? Write a few words of commonalities for each overlap in
the Venn diagram. Can you find one in common for all three?

Answers

Answer:

you have not posted any Venn diagrams, so it is of an impossible feat for anyone to assist in your problem

Importances of bacteria to humans​

Answers

Answer:

Bacteria are very important to humans, both for good and for bad, due to their chemical effects and the role they play in spreading disease. In their beneficial effect, some bact

Some bacteria are used for the production of antibiotics which is useful to human

Imprinting can be cell-type specific; for example, this region of chromosome 15 is ONLY imprinted in neurons and a few other specific cell types, but it is not imprinted in most cells in the body, such as bone, liver, and heart cells. Which of the following statements are true about a healthy individual without Prader-Willi or Angelman syndrome? ( Choose two answers)
a. Maternal and paternal copies of SNRPN are expressed at the same level in heart cells.
b. The maternal and paternal copies of UBE3A are differentially expressed in bone cells.
c. The maternal copy of SNRPN has DNA methylation at its promoter in liver cells.
d. Expression of the paternal copy of UBE3A is silenced in neurons.

Answers

Answer:

The correct answer is - A and D.

Explanation:

Genetic imprinting is DNA modifications that result in changing the expression but not the sequence. Factors That affect such changes present both within and outside the cell.

It is a result of the silencing of either maternal or paternal alleles in a pair. This occurs random and leads to phenomenon like X-inactivation. The mechanism involves methylation of the DNA to be silenced. paternal copy of UBE3A is silenced in neurons.

what is osmolarity of mammalian urine?​

Answers

Answer:

The osmolarity of mammalian urine may vary over time. The osmolarity of mammalian urine varies little between species. Mammalian urine is always hyperosmotic to blood. The osmolarity of mammalian urine may vary over time.

Explanation:

I hope it will help you

After fertilization occurs, the zygote undergoes cleavage and gets converted into 2,4,8 and subsequently a 16 celled stage known as morala. Thereafter certain changes occur in the morula and a blastocyst is formed. The blastocyst then gets implanted in the wall of the uterus.
A.3days

b. 6 days

c 10 days

d 14 days

Answers

Answer:

B. 6 days

Explanation:

I don't know a proper explanation, but overall it takes approx 6 days for the blastocyst to get implanted in the wall of the uterus.

A conservation biologist is working to protect elephant seal populations. Elephant have a classic type I survivorship curve with very low levels of juvenile mortality and high survivorship rate. They insist that reducing threats to adults is more important than protective juveniles. Are they correct

Answers

Answer:

Elephants and Classic Type I Survivorship Curve

The conservation biologist is correct.

Explanation:

Classic type 1 survivorship curve means that mortality of elephants increases as they age, and their fecundity (or fertility) decreases as they age.  Therefore, reducing the threats to adults should be more important than protecting the younger elephants.  The younger elephants have higher rates of survival and fecundity than their older parents.

Where is DNA found in the cell??????

Answers

The DNA is found in the nucleus of the cell

.1.2 The type of control shown in the diagram is known as

Answers

Answer:

which diagram

Explanation:

I hope you understand

Nguyên nhân gây bệnh quáng gà ở người là do:đâu

Answers

Answer:

nearsightedness, or blurred vision when looking at faraway objects cataracts, or clouding of the eye's lens retinitis pigmentosa

Explanation:

PLEASE HELP FAST PLEASE ASAP HURRY

Answers

Answer:

A number is a correct answer

how does a viral immunization help prevent disease

Answers

Answer:

When people get vaccinated they there will be less change of transfer of communicable diseases

Name three ways that humans benefit from the use of seedless plants

Answers

Answer:

They support life by being the first vegetation to spring up on harsh terrain where soil is scarce. Even when they perish, seedless plants give back to nature. Certain seedless plants like moss and liverworts actually leave behind a layer of fertile soil for other plants when they perish.

Explanation:

Seedless plants have historically played a role in human life through uses as tools, fuel, and medicine. Dried peat moss, Sphagnum, is commonly used as fuel in some parts of Europe and is considered a renewable resource.

The precursor of EGP is translated from a transcript that has had one non templated nucleotide added to the open reading frame. This change does not create or eliminate a stop codon. Compared with the protein sGP, which is produced from the unedited transcript, EGP most likely has the same primary:

Answers

Answer:

Explanation:

It was added somewhere in the middle. Since this is a frameshift, everything downwind of the addition will most likely be different.

The question is basically asking, if you change everything from the middle to the end of an amino acid sequence, which end changes and which end would remain the same?

It basically asks, when amino acids are assembled into proteins, are they built from the amino to the acid direction, or the acid to the amino direction?

The answer is that amino acid sequences are always assembled N to C, much like nucleotide sequences are built 5 to 3.

Make a molecule between 11Na and 2He and name it.

Answers

Answer:

Na2He

Explanation:

This is the correct answer

Which statement applies only to the axial skeleton not the appendicular skeleton

Answers

It protects the heart and lungs


Which of the following correctly lists functions o
proteins?
transporting substances, creating proteins,
and fighting disease
being the blueprints for life and the bases of
heredity
providing structure, regulating cell processes
and creating movement
O sending messages, providing structure, a
creating proteins

Answers

Answer:

please follow me

Explanation:

providing structure, regulating cell process and creating movement.

Enzymes secreted by the lining of the stomach to aid digestion are specially designed to function under what conditions?
a. Low temperature
b. Low pH
c. High pressure
d. High pH

Answers

Answer:

A, Low tempature

Explanation:

Im sure you know what denaturing is by now, and denaturing of an enzyme happens when it gets too hot, so Low tempature is the answer, hope this helps, mark me a brainliest if you can

Should the U.S. be able to prevent other countries from developing nuclear power?

Answers

Answer:

We should use nuclear power instead of other sources of energy because it can produce high levels of electricity without causing damage to our environment and atmosphere. ... Nuclear power plants produce less pollution than many of our other current energy sources, including coal fire and natural gas plants . I dont think us will be able to prevent other countries from developing nuclear power because  us is also developing nuclear power and 1 country cannot stop countries more than 150 ..

Explica con tus palabras el proceso de la formacion de orina

Answers

Answer:

Answer to the following question is as follows;

Explanation:

The kidneys filtration undesirable chemicals from the bloodstream and expel them through urine. Urine is formed in three stages: glomerular filtration, re - absorption, and secretion. These procedures guarantee that the bodies natural waste and surplus water are eliminated.

Which outcome is a direct result of hydrogen bonding?

Answers

cohesion and adhesion

Answer:

Cohesion and Adhesion

Explanation:

ANOVA is a technique that permits the comparison of the equality of means for multiple populations. Thus, 3 means could be compared and a determination of whether or not one of the means is significantly different from others can be made. This technique is extremely useful, but, as is always the case, the application requires a firm understanding of models assumptions. Consider the following scenario. A meticulously determined random sample of 200 observations is taken from a very large population. This data divides into 4 groups or factor levels, and a numerical measure for each observation is recorded. The population distribution of the measure appears to be slightly skewed positive. The 4 groups have the following number of observations 30, 100, 15 and 55. Which of the following statements leads to the greatest concern in using ANOVA as an analytical technique.
a. Unequal sample sizes among groups can seriously affect the power of the test.
b. Slightly skewed positive distribution of population measures seriously affect the power of the test.
c. In this scenario, I should be concerned about whether the data has been gathered in a biased fashion.
d. Four is not a sufficient number of groups into which to divide the data.

Answers

Answer:

c. In this scenario, I should be concerned about whether the data has been gathered in a biased fashion.

Explanation:

ANOVA is a statistical method which separates observed variance data into different components to use. One way ANOVA is used for three or more groups of data. The greatest concern in ANOVA is that the data gathered should not be biased.

You get the idea to go check to see if you grandmother's car is missing so you go into the garage and find her car there, with the keys in the ignition, and this piece of paper on her front seat. Can you uncover the code she left you?

attached below

Answers

Answer:

A2 B1 C4 D1

Explanation:

Is cell division a continuous process?

Illustrate with an example

Answers

Answer:

Cell division is the means of reproduction in unicellular organisms whereas it is the means of tissue growth and maintenance in multicellular organisms. ... In adults, cell divisions are involved in renewing old tissues rather than growth.,ya it is continuously processing

Help meeee!!!!
Why is it necessary to check total aerobic microorganisms in microbiological quality control but not to test total anaerobic microorganisms?

Answers

Answer:

While many microbes are harmless to humans, others can cause serious problems. They can spoil food, introduce toxins, cause disease and lead to a host of other problems. The importance of microbiological testing is to quickly identify these contaminants and treat them before they do irreversible damage.

Explanation:

Aerobic bacteria are bacteria that can grow and live when oxygen is present.

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Alizarin yellow is a pH indicator that transitions from red to yellow when the pH falls from a value of 11 to below 10. Why is phenol red a better pH indicator than alizarin yellow for detecting a change in pH of broth containing pathogenic bacteria such as E. coli PLEASE SOLVE ASAP!!!1. Use your virtual Algebra tiles. Make a square using one or more of each of the following types of tiles.x^2-tilex-tile1-tileDescribe the area of your square using an algebraic expression.2. Use the information about Al-Khwarizmi on page 504 to explain how ancient mathematicians used squares to solve algebraic equations. Include an explanation of Al-Khwarizmis drawings for x^2 + 8x = 35 and a step-by-step algebraic solution with justification for each step of the equation. -9-13+2+13913+2+13minus, 9, minus, 13, plus, 2, plus, 13.me lo pueden resolver porfa es para maana antes de la 12:59 Which expression is equivalent to sqrt of (6x^5 z)^3/ 4x^4 z^2 Another name for plasma Which is the most common style for citing source information within a report or article?A parenthetical citationsB footnotesC end notesD bracketed citations The table shows the steps for solving the given inequality 4-3(x-5)>6x-17 A travs de qu personajes de Edipo Rey se evidencia el tema del poder?de qu manera? Harold used 6 centimeters of tape to wrap 3 presents. What is the unit rate? Which of the following was an important feature of the houses of atal Hyk? Pls answer my question it is urgent it is Notice writing The early Russian civilization adopted the Eastern Orthodox religion, the Cyrillic alphabet, and different styles of art andarchitecture through contact withA. traders from ChinaB. conquering Mongol invadersC. Vikings from northern EuropeD. missionaries from the Byzantine Empire Can someone help me please this test is very important A scientist is studying the growth and development of an epidemic virus with a growth rate of 9% per month that has infected 3,124 people. If this rate continues, what will be the number of infected people in another 9 months? Round your answer to the nearest whole number. Hi ...since it's the pandemic..I have to record my student council speech from home before campaigning So is it better to wear a uniform or casual clothes would do while recording the speech? Imagine that youre a geologist. This means that you study rocks, minerals, and the natural processes that happen beneath the Earths surface. You are sent to study this volcano in Hawaii. Youll have to learn about the volcano, why it erupts, and when it erupts. You will also have to learn about how the volcano affects the people, plants, and animals that live nearby. Which of the six essential elements of geography would you be using? Explain your answer in at least three sentences. Alguien que me ayude por favor why must the composition of the dialysis fluid be similar to that of the blood Does friction enhance movement? True or false Using your observations and knowledge of galaxies, is there a pattern or organization to how the billions of stars are arranged in a single galaxy or do you feel it is random?