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defon
1 year ago
11

Why was the discovery of the Australopithecus afarensis child, nicknamed “Selam,” such a significant finding with regards to hom

inin evolution?
a) The skeleton is a transitional fossil, highlighting how hominins began transitioning from a tree-based lifestyle to a bipedal lifestyle.
b) The neck bones of that fossilized skeleton were attached to the bottom of the skull, as opposed to the back of the skull like modern chimps.
c) The fossilized skeleton was found with intact, fossilized shoulder blades, which provided key insight into the timing of when hominins abandoned their tree-based lifestyle.
d) The fossilized skeleton of the A. afarensis child contained foot bones with a separated big toe, similar to modern chimps.
Biology
1 answer:
Sergeu [11.5K]1 year ago
4 0
Nanakakskskakkakalalalallkalalalakakkaak

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Help please!
Lesechka [4]

Answer with Explanation:

Hydrogen peroxide is considered<em> "unstable,"</em> thus, storing it in the refrigerator provides two advantages:

1. It slows down thermal decomposition.

  • The rate of decomposition slows down when the temperature is lowered. It increases when the temperature rises.

2. It prevents photolytic decomposition.

  • Photolytic decomposition happens when hydrogen peroxide is exposed to sunlight or bright light. It therefore increases the rate of reaction. Therefore, hydrogen peroxide should be stored in a <em>cool and dark place</em>, such as the refrigerator.
5 0
3 years ago
2. Dominant trait: cleft chin (C) Mother’s gametes: Cc
kakasveta [241]

Answer No 2:

      c      c

C   Cc     Cc

c    cc      cc

The genotype of the offsprings would be Cc, Cc, cc, cc i.e heterozygous cleft chin and no cleft chin. The phenotype of the offsprings could be 50% cleft chin and 50% without cleft chin.

there will be 50% chance of the child to have cleft chin.

Answer No 3:

        A        a

A     Aa       Aa

a      Aa        aa

There will be 25% chance for the offspring to have arched feet. As arched feet is a recessive trait, so for this trait to occur both the alleles of the gene should be recessive i.e aa.

Answer No 4:

    B      b

b   Bb    bb

b    Bb    bb

As blonde is a recessive trait, so both the alleles for this gene should be recessive for this trait to occur. Hence, according to the punnet square, there will be 50% chance for the offspring to be blonde.

Answer No 5:

           F      f

F          FF    Ff

f           Ff     ff

As normal vision is a resessive trait, hence both the alleles of the gene should be recessive for the trait to occur. According to the punnet square, there is 25% chance that the child will have normal vision.

3 0
3 years ago
You can prove siblings are related by_
olga_2 [115]
Well, there is only one realistic answer. Option One is when you take the DNA of two different people or creatures and combine them into one organism. Cloning wouldn't prove anything here, "hybridization" is weird - but it doesn't have anything to do with the situation. So only only remaining option is DNA Profiling - also known as DNA Mapping, which shows the DNA structure and order that can be seen the same way in siblings (slightly different of course but it is still the right answer).
4 0
3 years ago
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What would you most likely find in the nucleus of a cell? *
iren2701 [21]

Answer:

eukaryotic cells

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3 years ago
Substance that makes a plant woody.
alisha [4.7K]

Answer:

I think it's stem of a plant.

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