Question | Answer |
are human cells the same as animal cells? | basically. both have nucleus, cytoplasm, cell membrane, mitochondria and ribosomes |
how do plant and algal cells differ from animal cells? | plant and algal cells have all animal features, with a cell wall. Some plant cells have chloroplasts and a permanent vacuole. |
what are bacterial cells like? | consists of cytoplasm and a membrane surrounded by a cell wall. the genes are not in a distinct nucleus |
how are yeast cells unique? | single-celled organism. each cell has a nucleus, cytoplasm and membrane surrounded by a cell wall |
what are plasmids? | small circular bits of DNA |
why do bacteria cells have flagellum | to induce movement. |
how do yeast reproduce? | asexual budding |
3 features of a fat cell | small amount of cytoplasm
few mitochondria
expandable |
3 features of a cone cell | outer segment has a visual pigment
middle segment full of mitochondria
specialized synapse connected to optic nerve |
2 features of root hair cells | hairs increase surface area
large permanent vacuole to speed up osmosis |
4 features of a sperm cell | long tail
middle section full of mitochondria
acrosome stores digestive enzymes
large nucleus |
why are cells specialized? | carry out a specific function |
what is diffusion? | net movement of particles from an area where they are at a high concentration to an area where they are at a low concentration. |
what affects the rate of diffusion? | the greater the difference in concentration, the faster the rate of diffusion |
what is concentration gradient | difference in concentration |
what is a tissue? | a tissue is a group of cells with similar structure and function |
what is an organ? | organs are made of tissues. one organ may contain several types of tissues. |
what are organ systems? | groups of organs that perform a particular function |
examples of organ system in an animal | digestive, respiratory, circulatory, etc... |
3 plant organs | stems, roots and leaves |