Plant and animal cells are different because..

plant cells do not have a nucleus or mitochondria
animal cells do not have dna or ribosomes
plant cells do not have a cell membrane
animal cells do not have a cell wall or chloroplasts

the system that transports oxygen and nutrients to the cell is the *

immune system
digestive system
circulatory system
endocrine system

a nerve cell is called a *

neuron
notochord
lipid
lysosome

which of the following are listed in order of complexity? *

tissue, cell, organ, organ system, organism
organ, tissue, cell, organ system, organism
cell, tissue, organism, organ system, organ
cell, tissue, organ, organ system, organism

what structure on this plant makes seeds so that the plant can reproduce?

flower
leaf
stem
roots

the male part of the flower is *

the stamen including the filament and the anther.
the flower including the petals and the sepal.
the pistil including the stigma, style and ovary.
there is no male part of a flower.