The first known bird fossils date to which era of time.

Answers

Answer 1

Answer: Jurassic era

Explanation:

Hope this helps


Related Questions

HELP!!! due today and ignore the one i chose if its incorrect

Answers

if i had to pick id pick the fourth option

Which of the following correctly completes the table?
A, A=DNA or RNA, B=cell fuel and support, C=galactose and glycogen, D=nucleic acids and fatty acids
B,A=DNA or RNA, B=cell fuel and support, C=galactose and glycogen, D=nucleic acids and fatty acids
C, A=fructose and lipids, B =cell control and fuel, C=enzyme and catalyst, D=nucleotides and myosin
D, A=hemoglobin and insulin, B=cell control and reproduction, C=deoxyribose and ribose, D=sugars and lipids

Answers

Well the good thing is, the correct answer is here, the bad news is it appears twice but I believe that is a mistake?
The correct answer is A or B, they’re the same thing but they are the correct answers

In the planetary model, electrons
A)do not exist
B)are shown in a cloud
C)have positive charges
D)orbit the nucleus like the planets orbit the sun

Answers

Answer:

Orbit the nucleus

Explanation:

Wikipedia

The amount of carbon on this Earth does not change. However, where the carbon is located does change. These locations are referred to as sources and sinks. Sources are areas that add carbon to the atmosphere and sinks are areas that remove carbon from the atmosphere. The sources and the sinks are important to the regulation of green house gasses. Carbon dioxide is one of several green house gasses that keep our planet warm. Too few greenhouse gases in the atmosphere would allow our planet to freeze, too many cause our planet to warm up too much. In the space below describe how humans are disrupting the natural cycle and contributing to the green house gasses in the atmosphere.

Answers

Answer:

In this stylized representation of the human-intensified greenhouse effect, human activities, predominantly the burning of fossil fuels (coal, oil, and gas), are increasing levels of carbon dioxide and other heat-trapping gases, increasing the natural greenhouse effect and thus Earth’s temperature.

Explanation:

One problem that was brought about by human action and is definitely affecting the hydrosphere globally is that of the greenhouse gases (so called because of their heat-trapping “greenhouse” properties) emitted to the atmosphere. Of the greenhouse gases released by anthropogenic activities, carbon dioxide has received much attention.

use the picture of the goat by the water to determine if the following statements are observations, or ir
the statements are inferences. Place an "In" in the blank for inference and an "Obs" in the blank for
observation
1. The kid is in the water.
2. The weather is cold.
3. The tree branch is broken.
4. If the kid crawled out of the water, the goat would push him/her.
5. The kid fell off the branch.
6. The goat is standing by the pond.
7. The branch will fall on the kid's head.
8. The kid fell off the rocks.

Answers

1) obs
2) in
3) obs
4) in
5) in
6) obs
7) in
8) in

knowing what you know about how a substance travels in diffusion in order for carbon dioxide to leave the blood and enter the alveoli there would be higher or lower concentration of carbon dioxide

Answers

Answer:

CO2 moves down its concentration gradient by simple diffusion. Therefore, CO2 would have to be high in the blood, and low in the alveoli for simple diffusion to happen, this would be done by passive diffusion and thus, simple diffusion.

Remember that in simple diffusion you go from an area of a high concentrated solute towards an area of low concentrated solute.

Your colleague asks you to verify her findings about a new polymer intended for use as a vascular graft. It must be reasonably elastic; otherwise, the blood will be constricted and increase its flowrate downstream with each pulse of the heart. She found that the material was sufficiently elastic for use inside the body. After running a tension test, you find that it is too brittle for use. Your colleague reviews your protocol and declares that you have either graduated from Duke or checked your eyelids for light leaks during Dr. Brudno's BME 203 class, because it definitely is adequate. Describe two mistakes you may have made. Put a (1) and (2) before each of your reasons.

Answers

Answer:

1.Vascular tube is used for vascular surgery and is very small in size with very small diameter and thickness,thus a little change in environment can also affect there result.

2.When testing for tension in the polymer it is very important to consider the strain rate as the increase in strain  can cause the material to  break.Therefore not only tension test but also strain test is required.

Explanation:

: Research coal and natural gas as a source of energy.

Answers

Answer:

Its fossil energy non renewable source

Explanation:

Answer:

Coal vs Natural Gas             Coal is a sedimentary rock with a high concentration of hydrocarbons and carbon. Given that it takes millions of years for coal to develop, it is categorized as a nonrenewable energy source. Coal is combustible and typically black or brownish black in color. Natural gas is a naturally occurring mixture of gaseous hydrocarbons, mostly methane, with small traces of other higher alkanes. Coal and natural gas have different benefits, effects on the Earth, and impacts on human health.             Natural gas is a fossil fuel; however its global warming emissions are significantly smaller compared to those from coal or oil. When combusted in a modern, efficient natural gas-power plant, natural gas releases between 50 and 60 percent less carbon dioxide (CO2) than pollution from an average modern coal plant. The impacts of human health due to air pollution from both coal and natural gas can lead to asthma and breathing issues, brain damage, heart problems, cancer, neurological disorders, and early mortality. These conditions are from the releasing of mercury, lead, sulfur dioxide, nitrogen oxides, particulates, and other heavy metals in to the air. In 2021, electricity producers in the United States paid roughly $4.98 per million British thermal units for natural gas. Coal power plant operators, on the other hand, paid an average of 1.98 US dollars; in simpler terms, the cost of generating electricity is cheaper using coal.             Coal is a reliable, cheap source of power. It is easy to store, reduces dependence on oil, and creates many jobs.  On the other hand, when burned to create power, natural gas produces roughly half the carbon dioxide (CO2) and one-tenth the air pollutants produced by coal. By using gas instead of coal, there is significant potential to cut near-term CO2 emissions and air pollution by using gas over coal.  It is adaptive. A gas-fired power plant starts and stops much faster than a coal-fired unit. Both gas and coal have plentiful pros and cons however gas is the better one to use. Gas is more abundant and pollutes more than coal. Though coal is cheaper, the effects on the environment and human health are not worth the gamble.               https://www.shell.com/energy-and-innovation/natural-gas/natural-gas-and-its-advantages.html  http://groundtruthtrekking.org/Reports/Coal-Electricity-Prices-Externalities-Analysis/1/Coal-Electricity-Prices-Externalities-Levelized-Cost/ https://www.statista.com/statistics/189180/natural-gas-vis-a-vis-coal-prices/

Which organelle performs a similar function in humans at the cellular level?

Answers

Full Question found elsewhere

The human body processes and eliminates food waste using the organs of the excretory system. Which organelle performs a similar function in humans at the cellular level?

Answer:

Lysosome

Explanation:

The lysosome is a part of the endomembrane system. It is a series of sacs containing digestive enzymes that are surrounded by membranes. Lysosomes are produced by the Golgi apparatus. They break down waste products so some components can be released outside the cell and others can be recycled.

View the incomplete table.
State
Arrangement of Atoms
T
are fixed; vibrate in place
U
move freely; spread out
liquid are closely packed slide past one another
V
have rapidly moving ionized particles
In which box could "salt" be placed?
Example
W
helium
X
Sun
Oo oo
E) 3 x

Answers

Answer: I believe answer choice C(w)

Explanation: That’s what I picked and I got it correct

pls help fast lol

Decide whether each of the following events would
result in primary or secondary succession.
3. A volcano erupts covering land in lava rock:
Type text here
4. Humans clear land for farming:
Type text here.
5. A lake dries up, forming a marsh:
Type text here
6. A wind storm builds new sand dunes:
Type text here​

Answers

Answer:

Primary

Secondary

Secondary

Primary

hope this helps <3

The following events would result in primary or secondary succession are:

1. A volcano erupts covering land in lava rock: primary succession.

2. Humans clear land for farming: Secondary succession.

3. A lake dries up, forming a marsh: Secondary succession.

4. A wind storm builds new sand dunes:  primary succession.

What are main differences between primary and secondary succession?

Primary succession happens in a region without any initial verdure. Secondary succession occurs in a region with initial verdure. Primary succession is started either due to a biological factor or an outer agent. An external factor initiates secondary succession.

Thus, these are the answer.

To learn more about primary or secondary succession click here:

https://brainly.com/question/1387957

#SPJ2

Species A contains 50 chromosomes in
each of its skin cells. How many
chromosomes are normally found in
each of its sex cells?

Answers

Answer:

14

Explanation:

It's a diploid, voila. If it were to have down syndrome, though, it would have 14 and 1/2 due to the fact that your 24th chromosome set is both a set in your connective system and a sex cell.

A) B only
B) Neither A or B
C) A only
D) Both A and B
please hurry....

Answers

Answer:

a is hydrolyphilic

Explanation:

b only. hydrophilic are the heads(spheres).

What term is used to describe the state in which molecules are evenly distributed in the available space?

Answers

Answer:

equilibrium

Explanation:

The term that is used to describe the state in which molecules are evenly distributed in the available space is dynamic equilibrium.

The molecules of a substance refers to a group of two or more atoms of the substance held together b chemical bonds.

Molecules of solids are fixed about a particular point except they are dissolved in solution. Molecules of liquids and gases, however, move about randomly.

When the molecules of a particular substance are more to one side between two adjacent points in a space, a gradient is created. However, when the molecules of the substance are uniformly distributed in a space, they are said to be in dynamic equilibrium.

More on the movement of molecules can be found here: https://brainly.com/question/2284581

Which example illustrates commensalism and NOT mutualism?

Answers

Answer:

you i need these points thx

Explanation:

Why is the lynx called a specialist?

Answers

Answer:

I can't better person to specialized the lynx people

»
How many meters are there in 2.5 kilometers?

Answers

Answer:

there are 2500 meters in 2.5 kilometers.

Answer:

2500 meters

Explanation:

The concentration of the solute in the solution is the same as in the cell

Answers

If the solute concentration is equal both inside and outside of the cell it is isotonic

Each parent gives one of these to the offspring to form a genotype.

Answers

Answer: Alleles

Explanation: Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism.

Each parent gives one ALLELE to the offspring to form a genotype.

An allele is a gene variant. which is inherited from each parent.

During fecundation, each parental gamete provides a different allele of a given gene/locus in order to form the genotype of an individual.

If both parents provide the same allele of a given gene/locus, then the individual is homo-zygous for that gene.

If both parents provide different alleles of a given gene/locus, then the individual is heterozygous for that gene.

In conclusion, one allele is inherited from the mother and the other allele from the father.

Learn more in:

https://brainly.com/question/2973829?referrer=searchResults

To which planet do scientists compare Kepler-10b?

Answers

Answer:

Earth

Explanation:

i hope this helps

What is a possible result of an increased amount of CO2 in the atmosphere?

Answers

Answer:

There are no options to this question, however, it can be answered using general knowledge. The answer is GLOBAL WARMING

Explanation:

Carbon dioxide, commonly called CO2, is one of the gaseous constituent of air. It is considered to be the most important greenhouse gas i.e. gases that have the ability to trap heat from the surrounding atmosphere. Due to this ability, CO2 in addition to other gases like methane are known to contribute to a phenomenon called GLOBAL WARMING.

GLOBAL WARMING is an increase in the atmospheric temperature of the Earth due to the effect of greenhouse gases. Global warming is a concern for the world populace, hence, an increase in the concentration of gases like CO2 in the atmosphere will lead to GLOBAL WARMING (an increase in Earth's atmospheric temperature).

helpppppp HAHAHAHHAHA IM STRUGGLING

Answers

Answer:

Option D = 3.4 g/mL

Explanation:

Given data:

Volume of water = 21.2 mL

Volume of water + object = 27.8 mL

Mass of object = 22.4 g

Density of object = ?

Solution:

First of all we will calculate the volume of object.

Volume of object = Volume of water+ object - volume of water

Volume of object = 27.8 mL - 21.2 mL

Volume of object = 6.6 mL

Density of object:

d = m/v

d = 22.4 g/ 6.6 mL

d = 3.4 g/mL

What is the structure and function of nucleic acids?

Answers

Answer:

Nucleic acids are long chainlike molecules composed of a series of nearly identical building blocks called nucleotides. The functions of nucleic acids have to do with the storage and expression of genetic information

PLEASE HURRY Which mutation results in the production of molecules that can be used as a source of energy?

a mutation that causes bacteria to fight off antibiotics

a mutation that breaks down the sugar in milk, lactose

a mutation that changes the color of a part of a flower

Answers

Answer:

It is the second one.

Explanation:

I know for a 100% chance because I just finished this test and got a 100.

Answer:

B.(a mutation that breaks down the sugar in milk, lactose)

Explanation:

Which of the following best describes a saturated fatty acid?

a. A lipid containing double bonds between carbons

b.A lipid sharing one pair of electrons between carbons

c. a nutrient organic molecule that is acidic

d.any lipid nutrient molecule containing carbons and hydrogens

Answers

Answer:

Any lipid nutrient molecule containing carbons and hydrogens.

Electrical signals are sent through the body by the ______ tissue
A. Nervous
B. Connective
C. Epithelial
D. Muscle

Answers

Answer:  A. Nervous tissue

Explanation: google

2. Create a summary statement for why we all need to wear masks in school (and in
public).
T

Answers

Answer:

First off: Masks protect others from our germs. While we may be taking in our own germs, others don't get harmed. It helps others, and if you think about it, it helps us too! The virus is airborne, so if we all wear masks we'll be safer than ever.

Explanation:

WILL BE MARKED BRAINLIEST AND PLUS 12 POINTS

Which detail from the passage best explain why plants photosynthesize?

Answers

Answer:

B.

Explanation:

I am pretty sure that is the answer

Answer:

A

Explanation:

NEED HELP ASAP * I THINK IS MY ANSWER
A carbon atom can form many different shaped molecules when bonded to other atoms. Which of the following best explains why this is true?

A)It has four valence electrons.

B)It forms hydrogen bonds.

C)It is an ion.*

D) It is an organic element.

Answers

Answer:

it has four valence electrons

Explanation:

Why do you think it might have a thick wax coating?

Answers

normalize explaining things better

Answer:

For slow burning

Explanation:

Other Questions
PasatiemposComplete the sentence with the correct conjugation of the verbs in parenthesis.PARAGRAPH 1: Los domingos mis hermanos y yo 11 _________ (to begin) el da en el parque. Nos gusta mucho jugar al baloncesto. Cuando nosotros 12_________ (to lose) un partido nos vamos a casa y 13_________ (to sleep). Cuando ganamos, 14_________ (to eat lunch) en un restaurante del centro y yo 15_________ (to remember) el partido. PARAGRAPH 2: Hoy, Isabela y Diana 16 _________ (to want) ir al cine. La pelcula 17_________ (to begin) a las tres de la tarde. Ellas 18_________(to think) salir a la una porque el cine est lejos de su casa. Mi hermana Sandra 19_________ (to count) con ellas para ir al cine, pero creo que ellas 20_________ (to prefer) ir con sus novios. La verdad es que yo no las 21_________ (to understand) a ellas. Please help. This question is on geometric sequences How could the continents have gotten so far apart and how long did it take for this to happen A chart is a type of graph A bag of snack mix weighs 12 ounces. A serving size is 3/4 ounce. Each serving has 120 calories. British control over South Africa is an example of ... NEED HELP GIVING 20 POINTS The diagram below shows the influence of the ideas of John Locke on the Founding Fathers,Which phrase completes the diagram?A. Monarchical GovernmentB. Separation of PowersC. Trial by JuryD. Government by Consent of the Governed What is the product?254X 47O 11,618O 11,818O 11,838O 11,938 Why is what Miller wrote about (the play: The Crucible) risky? Complete the expression so it forms a perfect-square trinomial.x - 5x + 25/4x + x + 49 Vanessa and Zack are playing a game where the player with the lower score wins. At the end of the game, Vanessa has a score of Negative 3 and Start Fraction 5 over 8 EndFraction and Zack has a score of Negative 3 and two-thirds. Which statement explains who won? PLEASE HELP QUICKWhich of the following best shows the distributive property?Group of answer choicesA) 2(2 + 3) = 2(2) + 2(3)B) 2 + 3 = 3 + 2C) 2 + (2 + 3) = (2 + 2) + 3D) 2(2 + 3) = 2(5) which statement most accurately compares epic poetry and lyric poetry? What was the result of the Jewish-Roman War of 66 CE?Jerusalem was destroyed, causing the Israelites to flee.Jewish culture was restored when the Israelites won the war.Romans were exiled from Judah and forced to return home to Rome.Judah gained freedom, which resulted in settlements throughout Israel. Give me a statement so I can write it which definition best describes a base 1. What does the rule of law mean?2. How does the rule of law protect Citizen?3. How does the rule of law impact lawmakers and courts? Hellllpppppp plzzzzzz Im failing!!!!!!!!!! Plzzzzz Read this example. Which statement best describes Jordan's response to the writing prompt? Jordan is given this writing prompt in class: Write a personal narrative essay that describes a significant experience with a family member that has shaped your identity. O Jordan's topic is acceptable, but it is not in the correct format. O Jordan's topic is not acceptable, because it is not a significant experience. O Jordan's topic is not acceptable, because it is not an experience with a family member. Jordan's topic and format are both acceptable, because they carefully follow the prompt. Jordan decides that he is going to write a letter to his cousin Andre to thank Andre for helping him write music and develop his talent as a musician.