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stiks02 [169]
3 years ago
8

Which statement BEST explains Lamarck's theory of acquired characteristics as it relates to the neck length of giraffes?

Biology
1 answer:
Nuetrik [128]3 years ago
3 0
LAMARCK's THEORY 
                                   
Jean Baptiste Lamarck (1744-1829) proposed a theory which was published in "<em>Philosophie Zoologique"</em> (1809).  This theory is simply known as Lamarckism. It has two main postulates:

1. Use and disuse of organs
2. Inheritance of acquired characters.

Example
             He explained his theory by giving the examples:
1. Neck length of Girrafes
2. Webbed toes of water birds, and
3. Wings of penguins

Explanation
               Lamarck explained that water birds use toe for swimming, with the passage of time webbed were developed in their toes. these features were then transferred to their offspring. 

Drawback
                Lamarck theory was based on natural observation. It did not explain the genetic basis of such characteristics.

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true or false? Cytokinesis is the division of the cytoplasm, whereas mitosis is the division of the nucleus.
zavuch27 [327]

Answer:True

Explanation:

Mitosis is just a part of a cell cycle. Mitotic M phase include both mitosis and cytokinesis.

In the cell cycle Mitotic cell division alternate with Interphase a growth phase. In the mitotic phase, mitosis divides the cell nucleus and distribute it's chromosomes to the daughter nuclei, cytokinesis divides the cytoplasm, producing two daughter cells.

During mitosis in the telophase stage of mitosis the division of one nucleus into two genetically identical nuclei, is completed.

In Cytokinesis, the division of the cytoplasm is usually well under way by the late telophase, so the two daughter cells appear shortly after the end of mitosis

6 0
3 years ago
What's a disadvantage of the point count method of population monitoring? It leads to the death of the sampled individuals. It o
Tcecarenko [31]

Answer:

It only records trends in population at fixed locations in the ecosystem.

Explanation:

The point count method is a method used to monitor the populaton of birds in certain places that consists on having someone fixed at one spot and record all the birds that he can spot by sight and by ear, so if he sees or hears a certain bird he records it, to have a close idea of the species of birds that there are in a certain location, the problem would be that it only records trends at fixes locations in the ecosystem.

5 0
3 years ago
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What effect has eukaryotic evolution had on cells? *
Murljashka [212]

Answer:

greater adaptability!!

Explanation:

hope this helps :)

6 0
3 years ago
A hidden population has been discovered in Turkey. Researchers have calculated that 22% of the population have Uner Tan Syndrome
Rainbow [258]

Answer:

Thus, 50% of the population are are heterozygous carriers for this condition

Explanation:

Researchers have calculated that 22% of the population have Uner Tan Syndrome. This condition follows the recessive mode of inheritance.

22% have the condition = q² (genotypic frequency uu) = 22/100 = 0.22

using the formular p + q = 1, since q² = 0.22, q = √0.22 = 0.4690

Thus p = 1-q where  is 0.4690 = 1-0.4690

  p = 0.5310

Then p² = 0.5310² = 0.2820 = 28% (genotypic frequency of homozygous normal)

using the formula p² + 2pq + q² where 2pq is the genotypic frequency of the heterozygous carriers. Thus, we have

2 x 0.5310 x 0.4690 = 0.498 = 50%

Thus, 50% of the population are are heterozygous carriers for this condition

6 0
3 years ago
A plant wilting is an example of what process?
BartSMP [9]
Osmosis. There you go comrade!
5 0
4 years ago
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