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e-lub [12.9K]
3 years ago
5

The umbilical cord contains _____ umbilical vein(s) and _____ umbilical artery(ies).

Biology
1 answer:
zimovet [89]3 years ago
8 0
The umbilical cord contains one umbilical vein and two arteries. Hope this helps.
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Calculate the acceleration of a boat that has been cruising at 15 m/s but speeds up to 45 m/s in about 6 seconds. Don’t forget y
Vera_Pavlovna [14]
Calculate the acceleration of a boat that has been cruising at 15 m/s but speeds up to 45 m/s in about 6 seconds. Don’t forget your units, m/s2. In order to calculate the acceleration of the boat we first have to identify the suited formula for acceleration in this scenario.

Hence, a = vf – vi / t. Vi = 15 m/s Vf = 45 m/s T = 6 seconds  

Solution:
A = 45 m/s – 15m/s / 6s
A = 5m/s^2



6 0
3 years ago
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Which shows the most direct path that carbon can take through the carbon cycle?
olasank [31]

Answer:

Atmosphere, plant, animals, fossil fuels.

Explanation:

Carbon Is the essential elements needed for life.

Carbon cycle is the movement of carbon from the atmosphere to the Earth.

Carbon move in the carbon cycle and start from the atmosphere.

In the atmosphere, carbon react with oxygen and it is inform of carbon dioxide. Plants use the carbondioxide along with water,and uses light energy from the sun to produce carbohydrates through a process of photosynthesis.

Animals get carbon from plants after consuming plants.

During respiration, carbon atoms are released to the atmosphere.

Some human activities like burning of fossil fuels releases carbon to the atmosphere.

4 0
3 years ago
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Explain how Natural Selection can lead to evolution.
vitfil [10]
Natural selection gets rid of those who are unfit of surviving and allows those who can survive to reproduce and live on
3 0
2 years ago
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Mike works in the metals industry. Which type of coal should he use as a fuel source?
Sonbull [250]

Answer:

B. bituminous

Explanation:

Bituminous coal is an organic sedimentary rock produced by compression of peat bog material by diagenesis and submetamorphics.

Bituminous coal has low moisture and high carbon content and hence used for the production of steel and cement, coke production an electricity generation.

Coking coal is a type of Bituminous coal are best used as fuel dource in metal industry having very narrow range of volatility and plasticity. Volatility is maintained by smelters  to optimize the ease of burn rate,  ignition, and energy output of the coal as this determines the burn rate of the coal.

Hence, the correct option is B. bituminous.

8 0
2 years ago
A finite supply of resources can lead to natural selection in a population.
Nimfa-mama [501]
I believe (B) is the best option due that it mentions the reason causing natural selection with limited supplies competition increases making it more likely for the strongest individuals to survive
8 0
3 years ago
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