The correct sequence of levels is shown by choice A.
Match each field of study to the correct piece of evidence. Tiles molecular biology comparative anatomy developmental biology Pairs embryo of a pig and a calf arrowBoth DNA of a pig and a calf arrowBoth limb structure of a pig and a calf arrow Both.
Secretion helps in moistening the food, making it easier to swallow and preventing oral infections.
The arrangement of homeotic genes along chromosomes of vertebrate and invertebrate animals corresponds to the expression pattern of the genes along the anterior-posterior axis of the developing embryo.
<h3>What are homeotic genes?</h3>
- Homeotic genes are a group of body pattern forming genes which control the development along the anterior- posterior axis of the developing embryo.
- These encode transcription factors which control and specify the genes involved in body patterning. These provide identity to the segments during embryo formation.
- Genes located in the 5’ end act on posterior side whereas the genes on 3’ end act on anterior region.
- Homeotic genes are evolutionary conserved and control body specification, patterning and differentiation.
- The loss of function of any of the gene changes the body pattern and affects the development.
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Answer:
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Explanation:
