3 . a) What tissue structure are unique to animal and what are the benefits of...

3 . a) What tissue structure are unique to animal and what are the benefits of these structures?

b.) In what way do animal cells differ from that of other multicellular eukaryotes? Explain.

c.) In what way(s) are sponges (Porifera/Parazoa) different from other animals (eumetazoans)?

d.) Describe the process of sexual reproduction in a typical animal.

e.) Describe the most common mode of asexual reproduction in animals.

f.) What is parthenogenesis?

Solutions

Expert Solution

A. Centrosomes - helps in the organisation and disintegration of microtubules during cell division which help in the movement of chromosomes during metaphase and anaphase

Lysosomes - unit membrane bound organelles which are also called as suicidal bags because they contain hydrolytic enzymes which help in the digestion of cellular debris, damaged then and other foreign particles

Extracellular matrix - made up of proteins and carbohydrates and provides structural support to the cell

B. Animal cells do not contain cell wall which is present in plant and fungus.

Animal cells contain centrosome and centrioles which are the centre for the formation of microtubules during cell division. Centrosomes and centrioles are present in fungus but absent in plants.

Animal cells contain lysosomes which are meant for the degradation of damaged cells and foreign substances. Lysosomes are absent in plants.

Animal cells do not contain chloroplast which is the site of photosynthesis. Chloroplast is present in plants but absent in both animals and fungus.

Animal cells do not contain vacuoles which are present in plants but absent in fungus.

According to the guidelines, only first question can be answered. Please give a good rating.

gladiator answered 1 year ago

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