Prophase is the first step in mitosis and many changes occur. Chromatin fibers become coiled into chromosomes, with each chromosome having 2 chromatids joined at a centromere. The mitosis spindle, composed of microtubules and proteins, form in the cytoplasm.
Answer:
C. It is a male with atleast one dominant allele
Explanation:
In the given pedigree, the two normal parents of the generation I have one daughter with the attached earlobe. Since the trait is recessive, the daughter should be homozygous recessive to express the trait. The genotype of the daughter (shaded circle in generation II) is "aa". To have a daughter with "aa" genotype, both the parents should have one copy of "a" allele. So, the genotype of both parents is "Aa".
In generation II, individual A is non-shaded square. Squares represent males in a pedigree. Since its not shaded, it does not have attached earlobe. Both the parents are heterozygous dominant for attached earlobes (Aa x Aa = 1/4 AA : 1/2 Aa : 1/4 aa). The genotype of this individual may be AA or Aa.
Blueberry: 1st Trophic Level
Rabbit: 2nd Trophic Level
Snake: 3rd Trophic Level
Cat: 4th Trophic Level
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Answer:
They main difference is in chemical composition and particle size. Silt is composed of silicate minerals, or those containing silicon and oxygen. Clay is composed of metal silicates, or silicates with metals like magnesium or aluminum associated with it.Clay particles are extremely fine — smaller than 0.002 mm. Sand particles are 2.00 to 0.05 mm in diameter
Explanation: Basically, the main difference is their size.
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