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lana66690 [7]
4 years ago
8

Scientists believe that Homo neanderthalensis appeared about

Biology
1 answer:
givi [52]4 years ago
4 0

Answer:

a. 200,000 years ago.

Explanation:

Scientists believe that Homo neanderthalensis appeared about 200,000 years ago. The name Homo neanderthalensis was given to them because first evidence of their existence was found in Germany near Neander Tal. Their period of existence is part of the Pleistocene period and they are considered as the immediate ancestors of modern humans (Homo Sapiens).

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Does a worm have cartilage?
serg [7]
Yes. Think of it as a skeletal structure for worms. It's basically what allows them to move.
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3 years ago
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If you extract the DNA of the coliphage φ X174, you willfind that its composition is 25 percent A, 33 percent T,24 percent G, an
kifflom [539]

Answer:

This composition of nucleotide given in the question do not obey the chargaff"s rule.

Explanation:

According to chargaff"s rule the total number of purine bases will be same to the total number of pyrimidine bases that is

         Adenine+Guanine=Thymine+Cytosine

But here the above quation is not maintained because according to the question A+G=49%

        and T+C = 51%.

Such DNA is replicated by rolling circle model.

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3 years ago
What effect does increased carbon dioxide
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Answer:

Carbon dioxide increases temperatures, extending the growing season and increasing humidity. Both factors have led to some additional plant growth. However, warmer temperatures also stress plants. With a longer, warmer growing season, plants need more water to survive.

Explanation:

3 0
3 years ago
Assume that the mother's genotype is AZ/az, and the father's genotype is Az/aZ, and the recombination rate is 10%. What are the
Varvara68 [4.7K]

Answer:

.45 from mom, .05 from dad

Explanation:

Given that:

the mother's genotype is AZ/az

i.e AZ = 50%

az = 50%     (parental)

But  we  were also told that the recombination rate is 10% which will like wise affect the mother's genotype

So 100% -10% = 90 % of the mother's genotype

We have a new genotype

AZ = 45%

az = 45% (parental)

Therefore the probability of az gamete from the mother = \frac{45}{100}

= 0.45

Similarly; the genotype of the father is:  Az/aZ

This is an heterozygous father who is diploid hence, there is a remarkable presence of two copies of each autosomal chromosome.

Az is the allele of the genes in one chromosomes and aZ is the allele of the genes in the other.

The gametes of this self cross are: Aa, AZ, az, zZ

Therefore; the recombinants are:

AZ

az

Since there are 10% recombinant; then

AZ = 5%

az = 5%

Therefore the probability of az gamete from the father = \frac{5}{100}

= .05

4 0
4 years ago
Explain how a single fertilized egg can develop into a multicellular organism.
ycow [4]

Answer:

The fertilized egg goes through mitosis to create many identical copies of the original cell then those cells will differentiate into specialized cells of different tissues.

Explanation:

7 0
3 years ago
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