biology characteristics of living organisms

what are the 7 characteristics

movement, respiration, sensitivity, growth, reproduction, excretion, nutrition

what is movement

and action causing a change of position

what are the types of movements, describe each

phototropism( stem and leaves towards the sun), geotropism (growth of roots towards gravity), hydrotropism (growth of roots towards water)

what is nutrition

taking in materials for energy growth and development (egd)

what are the types of feeding? describe

autotrophs: they make their own food with photosynthesis

heterotrophs: feed on ready-made food

what are the types of heterotrophs descibe each

1 herbivores: plant eaters

2 carnivores: meat eaters

3 omnivores: both meat and plant eaters

4 scavenger: feed on dead animals; decay them

5 decomposers: decompose dead organisms

6 parasites: derive food from living orgsnisms

what is excretion?

the removal of waste products from a living organism

Examples of types of excretion

1 carbon dioxide: during exhalation
2 sweat: through skin

3 urine: through kidneys

what is respiration?

a chemical reaction that breaks down glucose for metabolism

what is aerobic respiration

aerobic: with oxygen, in mitochondria, high energy yield, products are O2 and H2O, (glucose+oxygen=carbon dioxide+water)

what is anaerobic respiration

anaerobic: without oxygen, in cytoplasm, low energy yield, products are ethanol+CO2,

(glucose lactic acid + energy)

what is reproduction

makes more of an organism

What is asexual reproduction

1 parent needed, where an organism reproduces itself

what is sexual reproduction

2 parents needed, where gametes fuse to form a zygote

what is growth

permanent increase in size

what is sensititvity

the ability to detect a change in the environment

what is a stimulus

changes in the enviroment that cause a response

sensitivity in animals

external: light, temperature

internal: diseases, concentration of sugar in blood

sensitivity in animals

phototropism, hydrotropism, geotropism