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Xelga [282]
3 years ago
14

Bipedal walking is more energy efficient

Biology
2 answers:
Vinvika [58]3 years ago
6 0

Answer:

C. When running that is the answer

Oksanka [162]3 years ago
5 0

Answer:B.quadrupedalism

Explanation:

Studies today proves that bipedal locomotion evolved from quadrupedalism because it was more energy efficient.

In a research conducted by scientists

4 humans and 4 chimpanzees were made to run on a treadmill, the chimpanzees were trained to walk quadrupedally and bipedally on treadmill. When the results came out humans had used only one quarter of the energy the chimpanzees had used while knuckle walking.

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Approximately 71% of Earth is covered with salt water. This salt water comprises
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Answer:

one global ocean

Explanation:

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Does anyone know this this animal is. my Francis is a praying mantis but I’m not sure
Rashid [163]
It looks like a black praying mantis...

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Read 2 more answers
Put the following events in the correct order:
Wewaii [24]

Answer:

Explanation:

c. Transcription of one DNA strand results in mRNA, which is a complementary copy of the information in the DNA.

a. The mRNA leaves the nucleus and goes to a ribosome open choices for ranking.

b. The building blocks of proteins, are carried to the ribosome by tRNAsAmino acids.

The process of deoxyribonucleic acod starts with replication to transcription and translation.

Replication involves the formation of a complementary base from a old or template DNA Strand this then serve as a template for transcription.

transcription involves the coping of information on the DNA to an intermediate mRNA ( messanger ribonucleic acid) in the nucleus which then move from the nucleus to ribosome in the cytoplasm where translation occurs.

Translation is the conversion of the information on the mRNA to an amino acid with the help of enzyme transferse ribonucleic acid(tRNA).

Hence the arrangement is from C ---- A-----B.

3 0
3 years ago
Scientists seeking to determine which molecule is responsible for the transmission of characteristics from one generation to the
worty [1.4K]
A) DNA fulfils all three conditions:
<span>(1) copy itself precisely - in the process of replication, DNA copies itself and two molecules of DNA are formed. This process is very precise thanks to the great number of proteins involved in these process that prevents error occurring and proteins that can fix the error if it occurs.
(2) be stable but able to be changed - DNA is very stable molecule otherwise, it cannot be a genetic material. However, its chains can separate in a short length so the translational machinery can attach to it and the process of transcription can occur. Also, in crossing over, during meiosis, </span>the exchange of genetic material occurs and chromosomes change a bit.<span>
(3) be complex enough to determine the organism’s phenotype - it contains a number of genes responsible for different traits. All of this results in the </span>organism’s phenotype.


B) DNA copies itself. <span>Meselson and Stahl conducted the experiments on DNA replication in which they used </span>E. coli<span> bacteria as a model system. After they labelled all bacteria's DNA with heavy 15N by using medium with heavy 15N, they switched bacteria to medium with light 14N. After several generations, all bacteria's DNA was labelled with light 14N. This experiment evidenced that the self-replication of DNA is semi-conservative process.</span>
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3 years ago
What are three reasons why nebulae contribute more to stellar formation than other regions of the universe? They are rich in hyd
Alisiya [41]

They are rich in hydrogen and helium, they have unlimited supply of hydrogen, they have a strong gravitational pull.

Explanation:

Space where huge size of gaseous and dust cloud is present is called nebula. It is mainly made of hydrogen and helium. Nebula exist in the space which is between the stars and it is call as interstellar space.

Helix nebula is closest nebula which is near the earth. It’s distance from earth is about 700 light years.

Dark nebulae are very dense as well as cold. Nebula can be divided into dark nebula and bright nebula. The gas which is present between the stars is always combine with solid grains cosmic dust.

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