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Dahasolnce [82]
3 years ago
8

At what stage of development is the embryo a hollow ball of identical cells?

Biology
1 answer:
elena-s [515]3 years ago
6 0

Answer: blastula

Explanation: an animal embryo at the early stage of development when it is a hollow ball of cells.

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Name of the upper limb
Stells [14]

Answer:

I hope this helps u! :D

7 0
2 years ago
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A quantity of a gas has an absolute pressure of 400 kPa and an absolute temperature of 110 degrees kelvin. When the temperature
VMariaS [17]

Answer:  The new pressure of the gas is (A) 854.46 kPa.

The pressure of a given mass of gas at the absolute temperature 110 degrees K is 400 kPa.

The temperature is raised to 235 degrees K  with constant volume.

Therefore,

Initial pressure P_{1}=400kPa

Initial temperature T_{1}=110K

Final temperature T_{2}=235K

Final pressureP_{2}=?

According to pressure law of gas,

\frac{P_{1} }{T_{1} }=\frac{P_{2} }{T_{2} }     ( at constant volume)P_{2}=\frac{P_{1}T_{2} }{T_{1} }

P_{2}=\frac{400X235}{110}

P_{2}=854.46kPa

Thus, the required new pressure of the gas is 854.46 kPa.

5 0
3 years ago
15,000 years ago, when humans were foragers and hunters, what characterized daily life? What were humans eating, and where and h
lisabon 2012 [21]

1. 15,000 years ago the humans were still hunter-gatherers. Their daily lives were largely based around one thing, finding enough food to survive through  the next few days. This means that they had to constantly be on the move, be it for hunting animals, or for finding rich places with eatable plants. There was lot of walking, running, and scouting involved every day. It was a lifestyle of ''living through the day''.

2. During this period of time, the diet of the humans was consisted of animals they hunted, fish, and plants. There were differences from region to region though, so the people that lived along the coastline based their diet on marine animals, the ones that were living in colder regions were eating mostly meat, while the ones living in forested areas or grasslands had combination of plants and meat. The lifestyle in general was moving from place to place, be it on a daily basis, weakly, or seasonally, depending on the conditions. Some of these people were making small shelters, some of which were retractable and they were moving them with them, while others were using caves.

3. There are many difference between the forager peoples and the agriculturalists. The foragers were nomads, thus they were moving very often from one place to another, while the agriculturalists were having a settled lifestyle. The nomads very often had bad injuries which were often fatal, usually because of hunting, while the agriculturalists had much better health because they had much safer lifestyle. The foragers were not able to produce their own food, but instead they were relying on mother nature, while the agriculturalists were producing their own food and had the food problem solved.

4 0
3 years ago
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One day, Mark notices that Karen is cleaning up Daniel's room for the 4th time this week. When he approaches her about it later,
Radda [10]

Answer:

Mark thinks Karen is trying to represent the democratic type of parent.

Explanation:

Karen did not impose that Daniel keep playing tennis, which indicates that she is not trying the authoritarian style of parenting. Furthermore, she is not failing to care whether or not Daniel will stop playing tennis, which indicates that she is not trying the negligent parenting style.

However, Karen preferred to explain to Daniel that playing tennis is a beneficial activity and that she is helping him to stay on the team, which made Daniel reason and realize that she was right. This is an example of the democratic type of parentability, where countries explain their opinions on a particular topic, but allow their children to make their own decisions, without imposing reprisals, and without acting as if they don't care.

7 0
3 years ago
Do fossil fuels release carbon dioxide when burned?
Ray Of Light [21]
Yes when fossil fuels are burned they release the carbon dioxide locked inside of them
that is why fossil fuels are a big source of global warming and we will eventually run out of fossil fuels 
5 0
3 years ago
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