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ans 1
Types of Earlobes
An earlobe is made up of connective tissues combined with a mixture of areola tissues and fat cells. Earlobes have a good blood supply which help in keeping them warm and maintaining balance. Majorly, there are two types of earlobes found in humans - free earlobes and attached earlobes.
Free Earlobes: Free earlobes are the most common form of lobes found. This type of earlobe is often large and hangs below the point of attachment to the head. This happens due to the influence of a dominant allele. If the genes from the parents get expressed by the dominant allele, then the child will be born with free earlobes.
In most cases, the allele is regnant to the free lobes compared to attached lobes. The free earlobe parents can also give birth to an attached earlobe child, depending on the reaction of the allele gene. If parents with free earlobes give birth to a baby with attached earlobes, it is certain that both of them had both a copy of the dominant and recessive allele.
Attached Earlobes: These types of earlobes are not rare, but are also not commonly found. Earlobes of such type are small in size and do not have hangs. They are attached directly to the side of the head. The structural formation of this kind of lobe is due to the absence of the dominant allele in the chromosomes. The recessive allele is expressed instead in the chromosomes to form an attached earlobe. It is not necessary that parents with attached earlobes should give birth only to the attached earlobe child.
Traits are the major factors that result from chromosome pairs and which, in turn, determine one’s overall physical appearance. When alleles combine, some exert ‘stronger’ influence down sythan the others. The stronger allele is responsible for the dominant traits. Dominant alleles are said to be found throughout an organism. If the dominant allele fails to show its presence, the recessive allele will be expressed. These are known as recessive traits.
Although the traits vary, the size of the earlobes for both the traits remain the same. An average man’s ear measures 6cm, while for a woman it is about 5cm, in which the earlobe size measures about 2cm.
ans 2
1 Easy to obtain pure breed plant through self fertilization
2 Short lifespan
3 Easily distinguishable characters
4 Larger size of flower
5 easy to cultivate and grow
6 Many visible distinguishnh characters such as height, flower type, seed color, seed coat etc.
7 Large number of progeny can be produced in short duration.
8 Flowers are normally self pollinated but can be easily cross pollinated if self pollinaton is prevented.
Answer:
Paranthropus
homo erectus
homo sapiens
The description as "modern" is used as contrasting with the "archaic" Neanderthals who lived within Europe from 400,000 to 37,000 years ago. The term EEMH is equivalent to Cro-Magnon Man, or Cro-Magnons, a term derived from the Cro-Magnon rock shelter in southwestern France, where the first EEMH were found in 1868.
The species was initially thought to have emerged from a predecessor within the genus Homo around 300,000 to 200,000 years ago. ... The subspecies name H. sapiens sapiens is sometimes used informally instead of "modern humans" or "anatomically modern humans". It has no formal authority associated with it.
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