Atypical cells

Question 1

red blood cells

Answer 1

have no nucleus, in order to gain space and flexibility. Transport oxygen/co2. biconcave shape short life span and cannot repair themselves

Question 2

phloem sieve tube elements

Answer 2

Cell wall and plasma membrane is removed and a hollow tube is created. the dividing walls have pores to sap can pass through. sub units are called elements because of their atypical structure. each sieve tube element has companion cells adjecent to them.( around tube) companion cells have mitochondria and can make proteins.

Question 3

skeletal muscle

Answer 3

Syncytium structure. column of cells fuse together to form long muscle fibres. they are multinucleate.

Question 4

aseptate fungal hyphae

Answer 4

large multinucleate structure called coencyte. thread like hyphae develop like that. no cell division occurs. they lack a septa therefore unusual

Question 5

Striated muscle fibres

Answer 5

Have multiple nuclei surrounded by a single membrane (sarcolemma). are formed from multiple cells which have fused together (which is how they have
many nuclei rather than one) that work together as a single unit