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svet-max [94.6K]
3 years ago
10

The beginning of the phanerozoic is marked by the ________.

Biology
1 answer:
jek_recluse [69]3 years ago
7 0
Development of hard body parts, such as shells and bones
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I) Locus- the chromosomal site where a specific gene is located. A locus is a fixed position on a chromosome, like the position of a gene or a marker. Each chromosome carries ,many genes; human's estimated haploid (n) protein coding genes are about 20,000, on the 23 different chromosomes.


ii) Interference; the observed double crossover frequency differs from the expected double crossover frequency. Cross over interference is used to refer to the non-random placement of crossovers with respect to each other during meiosis. It results in widely spaced crossovers along chromosomes. Interference may exert its effect across whole chromosomes. As chromosomes in many eukaryotes are large, interference must be able to act over megabase lengths of DNA. 

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iv) Recombination- the process by which a new pattern of alleles on a chromosome is generated. Genetic recombination is the production of offspring with combinations f traits that differ from those found in either parent. During meiosis in eukaryotes, genetic recombination involves the pairing of homologous chromosomes. This may be followed by information transfer between the chromosomes. 
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The ________ division of the nervous system carries motor commands to muscles and glands.
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The answer is efferent division. The nervous system acts as an input-output system. The afferent nervous system conveys signals to the brain following a stimulus. After processing of the information, the brain sends out a signal in response. This response is carried by the efferent nerve to the requisite organ involved in the response.  






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Anaerobic and aerobic respiration both begin with...
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2. the breakdown of glucose i think...

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