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KIM [24]
3 years ago
13

Explain how the bone patterns in mammalian limbs came about, using the theory of evolution from a common ancestor

Biology
2 answers:
xxTIMURxx [149]3 years ago
8 0
The bone patterns in mammalian limbs can be further traced to the bone structure of the Xenarthra species as far as its histology is concerned. There has been a bone compactness showing pattern most specifically in the femur area between the species of Cingulata and Pilosa.
Ksenya-84 [330]3 years ago
3 0

Answer:

Limbs are homologous construction which are serially repetitive. The  ensuing hind limb was created by the old duplication incidents, the anatomical construction of the pectoral appendages  including the genetic design has been duplicated by the ensuing hind limb  which is control of the progress of induction, working together and ddevelopment. This complementary base of the limbs has important significance for its evolution.

Quantitative genetics theory is of the notion that genetic forecast has made limbs to undergo evolution in parallel solely among the stylopod, zeugopod and autopod which are corresponding segments.This genetic intake, observed in markings of phenotypic sheathing influence the variation that is relevant to draft coupled with the total immovability of limbs.

The entire phyla amphibians, reptiles, birds and mammals are known to be pentadactyl. The availability of pentadactyl limb indicates the inheritance of the specific  trait from a single ancestor with continious modifications in the period of evolution.

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andrezito [222]

Answer:

G and K

Explanation:

Crossing-over is a genetic phenomenon that occurs in meiosis, specifically, Prophase I. It is when chromosomal segment (genes) are exchanged between non-sister chromatids of homologous chromosomes. Crossing-over occurs only to genes that are UNLINKED i.e. genes located on different chromosomes or far apart on the same chromosome.

This unlinked genes are said to have the highest RECOMBINATION FREQUENCY. Crossing-over allows genes on the same chromosome but far apart from each other, assort independently, which allows alleles to be recombined on the same chromosome. This phenomenon does not occur to genes that are close on the same chromosome as they will be inherited together as a unit.

In this case, G and K are the farthest apart, hence, they will have the highest RECOMBINATION FREQUENCY i.e. the likelihood for homologous crossing-over to take place during meiosis.

4 0
3 years ago
This variable could also be called the potential effect?
larisa [96]

False.

It can either be called Dependent or Independent variable.

Hope this is correct :)

Have a great day

8 0
3 years ago
Cells can make proteins that need to be transported out of the cell and moved to another part of the body. Cells also make carbo
alex41 [277]

Answer:

The proteins will be transported through exocytosis; the carbon dioxide will diffuse through the membrane.

Explanation:

Diffusion is the passive transport of substances down their concentration gradient. The process moves the substances from the region of higher concentration to that of lower concentration. CO2 is a small molecule and does not have any charge. Small, uncharged molecules can diffuse through the lipid bilayer of the cell membrane. Therefore, CO2 can exit a cell by simple diffusion.

On the other hand, proteins are too large to be transported by diffusion across the cell membrane. The proteins are transported by exocytosis. During exocytosis of proteins, membrane-bound vesicles are formed inside the cell. These vesicles carry proteins in them and are called secretory vesicles. The membrane of the vesicles fuse with the cell membrane of cells and transport the proteins outside the cell.  

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Your answer would be D, Photosynthesis
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