Which came first, the Chicken or the Egg?
Eggs come from chickens and chickens come from eggs: that’s the basis of this ancient riddle. But eggs – which are just female sex cells – evolved more than a billion years ago, whereas chickens have been around for just 10,000 years. So the riddle is easily solved…or is it?
Taken at face value, there is no doubt that the egg came before the chicken. We tend to think of eggs as the shelled orbs laid by birds from which their chicks hatch – unless we eat them first. But all sexually reproducing species make eggs (the specialised female sex cells). That’s 99.99 per cent of all eukaryotic life – meaning organisms that have cells with a nucleus, so all animals and plants, and everything but the simplest life forms.
We don’t know for sure when sex evolved but it could have been as much as 2 billion years ago, and certainly more than 1 billion. Even the specialised sort of eggs laid by birds, with their tough outer membrane, evolved more than 300 million years ago.
As for chickens, they came into being much later. They are domesticated animals, so evolved as the result of humans purposefully selecting the least aggressive wild birds and letting them breed. This seems to have happened in several places independently, starting around 10,000 years ago.
The wild ancestor of chickens is generally agreed to be a tropical bird still living in the forests of Southeast Asia called the red junglefowl – with other junglefowl species possibly adding to the genetic mix. From these origins, humans have carried chickens around the world over the past two millennia or more.
So, eggs dramatically predate chickens. But to be fair to the spirit of the riddle, we should also consider whether a chicken’s egg predates a chicken. As humans consistently chose the tamest red junglefowls and bred them together, the genetic makeup of the resulting birds will have shifted. At some stage during this domestication process the red junglefowl (Gallus gallus) evolved into a new subspecies, Gallus gallus domesticus, AKA the chicken.
In practice, it is impossible to pinpoint the moment when this happened. But in theory, at some point two junglefowl bred and their offspring was genetically different enough from the species of its parents to be classified as a chicken. This chicken would have developed within a junglefowl egg and only produced the very first chicken’s egg on reaching maturity. Looked at this way, the chicken came first.
What are the 3 types of plate motion? Explain each one
Answer:
There are three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries. ... A divergent boundary occurs when two tectonic plates move away from each other.
Answer:
i really dont understand
Explanation:
1. Which of the following agricultural practices has the most significant long-term environmental impact
in tropical regions?
a. Clearing small patches of land to pasture dairy cows, which decreases water pollution from
runoff
b. Building terraces on sloping land to grow rice, which destabilizes hillsides
C. Burning extensive areas of forested land to create pasture, which decreases biodiversity
d. Burning small areas of forested land for subsistence farming, which increases biodiversity
e. Moving livestock to higher pasture areas in the spring, which leads to soil degradation
Which of the folloin
Answer:The correct answer is option "Burning extensive areas of forested land to create pasture, which decreases biodiversity".
Explanation:
The missing options of this question are:
A) Clearing small patches of land to pasture dairy cows, which decreases water pollution from runoff.
B) Building terraces on sloping land to grow rice, which destabilizes hillsides.
C) Burning extensive areas of forested land to create pasture, which decreases biodiversity.
D) Moving livestock to higher pasture areas in the spring, which leads to soil degradation.
The correct answer is option C) "Burning extensive areas of forested land to create pasture, which decreases biodiversity".
Tropical regions are rich in forested landscapes, where multiple species of animals and plants live. The agricultural practice that most significant long-term environmental impact is to burn these areas to create pasture. It is estimated that burning forested lands cannot be recovered in least than 28 years, while some areas have permanent damages.
Explanation:
The forest is a home for number of multiple species for their necessities and survival. These regions have high volume of forested landscapes. Different agricultural practices are performed in these areas.
Burning extensively the area of land covered with forest with a view to create pasture results in a decrease in biodiversity and has a significant environmental impact on tropical regions in long term.
Agriculture practices These areas are burned with a view to create of forest pastures. The practice of burning these areas has the most significant impact on environment in the long run.Practicing such agricultural practices of burning areas may result in permanent infertility of such areas. The damages caused by the burning of such areas can result in degradation of land and such land cannot be recovered for a estimated period of 28 years.Therefore OPTION C "Burning extensive areas of forested land to create pasture, which decreases biodiversity" is correct.
Learn more about Forests here:
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Mining is particularly important to the economies of many of the low islands of Oceania, as these islands tend to have the most natural resources. Please select the best answer from the choices provided T F
Answer:
False
Explanation:
Right on edge
Complete the following terms: (fill in the blanks with the words below)
Waves… Coarse Sand… Feldspar… Trough… Wind… Shoreface
Sediment… Swells…. Quartz… Crest… Wavelength…
A _______________ is the lowest point in a wave.
Answer:
the answer is Trough
Explanation:
I looked it up
1. Explain how food consumption varies globally. GIVE AN EXAMPLE OF EACH.
ult.
Cultural Preferences
Level of Development
Physical Conditions
EX:
EX:
EX:
Answer:
what
Explanation:
is the questionn
in which state did the anti Hindi agitation started
Answer:
The Indian state of Tamil Nadu
Explanation:
Just search up the question.
Which increased as a result of the Industrial Revolution?
Check all that apply.
u
A. Pollution
B. Travel tirages between cities
C. Population
D. Food prices
Answer:
a
Explanation:
what is Trig Beacon?
Answer:
A triangulation station, also known as a triangulation pillar, trigonometrical station, trigonometrical point, trig station, trig beacon, or trig point, and sometimes informally as a trig, is a fixed surveying station, used in geodetic surveying and other surveying projects in its vicinity.
~Hoped this helped~
Describe how mountains are formed at both convergent plate boundaries and divergent plate boundaries.
Answer:
Here's a non-copyrighted version of what the last person said :)
Mountain form at convergent plates boundaries, when the tectonic plates shove up against each other it forces the land to rise into mountainous forms as the said plates continue to clash.
The Taurus mountains are found in-
A. Saudi-Arabia
B. Iran
C. Turkey
D. Morocco
Answer:
C. Turkey
The Taurus mountains are found in- Turkey
Answer:
C. Turkey
Explanation:
Hope it helps!
Why do you think it is important to be accurate and unbiased
when coming to a conclusion in science and in life ? plz help
Answer:
here your answer
Explanation:
Two researchers published a paper on how the Internet is a big factor in announcing scientific discoveries but also can mislead the public due to bias and inaccurate reporting.
One thing that is important in reporting discoveries and disseminating information based on science is that it has to be accurate and unbiased. Science is based on experiments that should be both observable, measurable, and repeatable.
When CERN announced the discovery of the possible Higgs particle, they reported it as a 5 sigma discovery. This means that the discovery has a probability of 0.00003% that the result is accidental or due to chance.
Science reporting must be based on facts. Theories, although not yet proven to be science fact, still undergo scrutiny and has a fundamental principle behind it. The Higgs particle was a theory before, and it took the construction of the Large Hadron Collider for it to be discovered.
And even then, the discovery of the Higgs helps establish another theory which is the Standard Model.
There will be dissenting arguments when it comes to scientific research. Some are even on opposite sides such as Loop Quantum Gravity vs. String Theory. But regardless, it will ultimately fall on research being observable, measurable, and repeatable.
Personal beliefs has no room when it comes to science reporting. A recent article touched on how a Wikipedia editor kept deleting references to Global Warming on the Hurricane Sandy page because he personally does not believe in Global Warming
The Berlin Conference established the borders of North African countries including Egypt Libya, and Sudan The landscape of these countries influenced the types of boundaries imposed by the European colonial powers
Which of the following boundary types best explains the influence of landscape on the political borders of the North African region?
Answer: e. Geometric, with straight lines, disregarding physical features or tribal cultural differences of the areas.
Explanation:
The boundaries of the nations of Africa as they are now is as a result of the European scramble for colonies on the continent. When these European powers held the Berlin Conference, they simply demarcated the continent amongst themselves by making claims based on maps.
These claims enabled them to draw up boundaries that were geometric with quite a number of straight lines which cared little for physical features or the tribes living in the area.
This is why countries like Egypt, Sudan, Botswana and Angola have straight lines in their boundaries as well as why tribes like the Tswana are in two different countries being South Africa and Botswana even thought they occupy the same area.
If I wanted to increase the amount of gravity between any two objects, what factors should be adjusted, and how should they be changed? There are 2 answers with an explanation for each.
Which is a complete sentence?
01. Under the table in the library.
2. I enjoy playing the piano.
03. Keeping away from the icy spots.
04. Dan and Kristen both in charge
please anyone help me I need the answer right now Plzzzz
Answer:
The complete sentence is :2. I enjoy Playing the PianoA wire is 30 inches long is bent into a triangle with sides measuring g 6 inches 11 inches 13 inches find the measure of the largest angle
Answer:
Largest angle is 94.22°
Explanation:
The sides of the triangle are given as 6 inches, 11 inches, 13 inches.
Now, we can find the respective interior angles of the triangle using cosine rule.
Thus, for the angle opposite 6 inches, let's label it A. Thus;
6² = 11² + 13² - 2(11 × 13)cos A
36 = 121 + 169 - 286cosA
36 = 290 - 286cos A
290 - 36 = 286cosA
cosA = 254/286
A = cos^(-1)0.8881
A = 27.36°
Similarly;
11² = 6² + 13² - 2(6 × 13)cos B
121 = 36 + 169 - 156cosB
121 = 205 - 156cos B
205 - 121 = 156cosB
cosB = 84/156
B = cos^(-1)0.5385
B = 57.42°
Sum of angles in a triangle is 180°
Thus;
C = 180 - (27.36 + 58.42)
C = 94.22°
Thus,largest angle is 94.22°
The sum of the internal angle of the triangle is 180 degrees. Then the measure of the largest angle is 95.22°.
What is trigonometry?Trigonometry deals with the relationship between the sides and angles of a triangle.
A wire is 30 inches long and is bent into a triangle with sides measuring 6 inches 11 inches 13 inches find the measure of the largest angle.
Then we know that the cosine rule is given as
[tex]\rm cos\ C = \dfrac{a^2+b^2-c^2}{2ab}[/tex]
Let the angle of the triangle be A, B, and C.
Then the first angle A will be
[tex]\begin{aligned} cos \ A &= \dfrac{6^2+11^2-13^2}{2*6*11}\\\\cos \ A&= \dfrac{36 + 121 - 169}{132}\\\\ A &= 95.22^o \end{aligned}[/tex]
And we know that the sum of the internal angle of the triangle is 180 degrees.
∠A + ∠B + ∠C = 180°
95.22° + ∠B + ∠C = 180°
∠B + ∠C = 84.78°
More about the trigonometry link is given below.
https://brainly.com/question/22698523
Using a modern steel with the same weight of material, you can support _____times the load.
Help me out pls.
Piece of infrastructure that connects the Red Sea to the Mediterranean sea
A. Itaipu Dam
B. Aswan High Dam
C. Panama Canal
D. Suez Canal
Answer:
D. Suez Canal
Hope this helps :)
How do you think the Forest Industry has disrupted the homes of First Nations communities across Canada?
Answer:
the weather executes us
Explanation:
because it's cold tge water/rain turns into ice and to show
How many sides does a polygon with a exterior angle of 5 have?
Answer:
72
Explanation:
help !!!
Find all these ......
Answer:
All the above answers from the first response is correct. Hope you have a wonderful day.
Should a stronger country today be able to tell a weaker country what to do? (Six sentences long plz otherwise I won't get credit!)
I do not believe that a strong nation should be able to boss around weaker nations. This is just wrong in that a nation should be free to decide what it wants to do. A strong nation can assist them in developing. How ever they should not rule them. At that point that weaker nation will be stripped by of their sovereignty. This is not that times of Empires.
the map was made using data collect by satellite imaging equipment
which two regions have the coldest land surface temperature according to the map?
a. region 4
b. region 2
c. region 1
d. region 3
it’s multiple choice
region 2 and region 3 two regions have the coldest land surface temperature according to the map. Thus options B and D are correct.
What is a map?A map is a visual depiction of specific features of a location, typically created on a smooth surface. Maps provide straightforward, visible information about the globe. They demonstrate the dimensions and shapes of the world's nations, the locations of its characteristics, and the distances between regions to teach about it.
The region in which the temperature that is present in the thermal waves is low will be the coldest land surface temperature. This will be when the region will not receive enough amount of sunlight. In this region 2 and 3 will be the one.
Therefore, option B and D is the correct option.
Learn more about map, Here:
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#SPJ2
This Question Should Be Extremely Easy.
The Taurus mountains are found in-
A. Saudi-Arabia
B. Iran
C. Turkey
D. Morocco
Answer:
C. Turkey
Explanation:
The orbiting of the Earth around the sun is called ________. a Orbit b Axis c Rotation d Revolution
Answer:
revolution
Explanation:
Help please
_____ happens when gravity moves sediment downhill.
a. Weathering only
b. Mass movement
c. Erosion only
d. Gravity
Answer:
B
Explanation:
A mass movement denotes a political party or movement which is supported by large segments of a population. Political movements that typically advocate the creation of a mass movement include the ideologies of communism, fascism, and liberalism. Both communists and fascists typically support the creation of mass movements as a means to overthrow a government and create their own government, the mass movement then being used afterwards to protect the government from being overthrown itself; whereas liberals seek mass participation in the state apparatus of representative democracy.
Answer:
B. Mass movement
Explanation:
Gravity can cause erosion and deposition. Gravity makes water and ice move. It also causes rock, soil, snow, or other material to move downhill in a process called mass movement.
Angela is your partner for a presentation, and you are getting worried. Angela hunches her shoulders and speaks in a whisper. She barely looks at you when the two of you are working on your project. Explain how you would help Angela boost her self-confidence so that the two of you do well on your presentation. pls help
Answer: Don't Tell Them They're Wrong, Rely On Evidence, Don't Say You're Envious Of Them
Don't Say You're Envious Of Them.
Help Them Find The Roots Of Their Insecurity.
Reassure Constructively.
Give Them An Object To Come Back To.
Realize That Even High Achievers Feel Like This.
Explanation: Just tell them that just to be her self everybody is different.
hint
do not plagiarism this because i used this word per word for mine cause i have the exact same assignment
Answer
I think to boost her self confidence you need to start talking to her saying she's doing a great job and to keep up her hard work and if she is struggling help her instead of ignoring her.
name one other process of coastal erosion. Explain how it is likely to have eroded the cliff
Answer:
abrasion
Explanation:
forgive me if im wrong
Need help asap!!! Will give brainliest!!!!!
Answer: it’s, travels through air, liquid, or solid and move in the same direction as the energy flow
Explanation:
Part 1 Answer the following questions. Place your responses in the essay box below for Part 1. What type of map is this? Are there any faults on the map? If so, what types? Around the Salt Lake, what is the geologic age of the area and what type of geologic unit is found there? South of Richfield, what type of rock is most prevalent? Which geologic area or rock is the oldest? Which geologic area or rock is the youngest? Are there any intrusive rocks found in Utah? And where? In the Green River and Price area, what fossil fuel would you expect to find there?
The type of map represented in the picture is a geological map. Geological maps show features such as soil and rock type and structural features such as faults. There are numerous faults represented on the map The main type observed are thrust faults. The area around Salt Lake is approximately between Quaternary to late Tertiary based on the map. The main geologic unit in this area is composed of alluvial, glacial and lake sediments. Middle Tertiary volcanic rocks can be found south of Richfield. Pre-Cambrian metamorphic (narrow outcrop east of the Great Salt Lake) and igneous rocks are the oldest represented on the map. The youngest rocks are Quaternary salt flats found mainly south-west of the Salt Lake. Intrusive rock outcrops can be found in different areas on the map. Outcrops can be observed southeast of Richfield, south-east of Ceder Clay and North of Lake Powell. Coal is the fossil fuel type present in the Green River and Price area.