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Andre45 [30]
3 years ago
15

Modern humans first appeared during the

Biology
2 answers:
stira [4]3 years ago
4 0
A. Most recent period of the Cenozoic era. 


ratelena [41]3 years ago
4 0

Answer:

The correct answer is A) most recent period of the Cenozoic era.

Explanation:

Modern humans belong to a species called Homo sapiens that first appeared approximately 200.000 years ago. The Cenozoic era is the latest, made of two periods (tertiary and quaternary) where the latest is the quaternary that goes from 1,8 to 0,01 million years.

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Evolutionary change in observable time scales.
Ierofanga [76]
What’s the question here? Are you referring to the Geologic Record?
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2 years ago
Roots also play an important role in water transport. Which plays the most important role in the movement of water through a pla
Archy [21]

Answer: plant--the absorption of water by the roots

Explanation: plants root aids the absorption of water and nutrients from the soil. Water is an important constittuents in plants when's its not adequate it could lead to wilting of the plant. Attach to the root is root hair this is what help in absorption of water and nutrients from the soil before it is been transported round the cell by xylem tissue. Water is moved through osmotic pressure from the region of higher concentration to low. The process of photosynthesis in plant requires water without the function of the root for absorption plants cannot actively photosynthesis. Hence root play an important role in water transport in plant .

Transpiration is loss of water from leave surface. The water been loss is

6 0
3 years ago
"describe the risks associated with drinking alcohol as a teenager"
kaheart [24]
From there, it affects<span> the central nervous system (the brain and spinal cord), which controls virtually all body functions. Because experts now know that the human brain is still developing during our </span>teens, scientists are researching the effectsdrinking alcohol<span> can have on the </span>teen<span> brain.</span>
5 0
2 years ago
A biology experiment requires the preparation of a water bath at 37.0°C (body temperature). The temperature of the cold tap wate
Anastaziya [24]

Answer:

mass of hot water must be 97.80

Explanation:

The change of heat contained in hot and cold water will be the same.

Thus,

Δq =Δ-q

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Substituting the given values in above relations, we get -

m_{hot}*c_{hot}*T_{hot} = m_{cold}*c_{cold}*T_{cold}\\

C value is constant for water irrespective of water being hot or cold. So the formula becomes -

m_{hot}*T_{hot} = m_{cold}*T_{cold}

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7 0
3 years ago
Read 2 more answers
How does a law differ from a theory?
Alona [7]
<h3><u>Law and theory:</u></h3>

A law foretells what occurs whereas a theory proposes why. A theory may never turn into a law; however, the advancement of one regularly triggers advancements on the other.

A decent scientific law is a finely-tuned machine, achieving its assignment splendidly however ignorant of why it fills in just as it does. A decent scientific theory is a wounded, however unbowed, contender who fears defeat if unfit to adapt or over power to the next competitor.  

Although unique, science needs both theories and laws to comprehend the entire picture. So, whenever somebody remarks that it's only a theory, challenge them to go nine rounds with the champ and check whether they can do any better.

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