3 087 mots et expressions · 21 thèmes
a sugary liquid produced by plants, often in flowers, that provides food for visiting animals
active mainly at night rather than during the day
the repeated movement and reuse of nutrients between living organisms and the nonliving parts of an ecosystem
the young produced by a parent organism or a pair of parents
an animal that eats both plant material and other animals
an individual living thing, such as a plant, animal, or bacterium
an organism that lives on or in another organism and obtains resources at that organism's expense
the process by which organisms convert light energy into chemical energy used to build organic substances
tiny grains produced by seed plants that carry the male reproductive cells or develop to produce them
to transfer pollen to the reproductive part of a flower, allowing fertilization to occur
the number of individuals in a population per unit of area or volume
an animal that hunts and eats other animals
animals that another animal hunts and eats
to free substances needed for growth so that other organisms can use them
the biological process by which new organisms are produced
an animal such as a snake, lizard, turtle, or crocodile, with scaly skin and body temperature strongly affected by its surroundings
not easily damaged or affected by a particular harmful substance, disease, or condition
all the roots of a plant considered as a connected structure for anchorage and absorption
the movement of seeds away from the plant that produced them
a young plant that has recently developed from a seed
reproduction in which reproductive cells join, combining genetic material to produce offspring
a biological group whose organisms share a distinct evolutionary identity
defending a particular area against other animals, often to protect access to resources or mates
a group of cells organized together to carry out a particular function in an organism
to withstand an environmental condition without suffering serious damage or losing the ability to function
differences in characteristics among organisms within a population
the maximum amount of fish or other aquatic animals that may be caught within a defined area or period
farming whose main purpose is to produce crops or animal products for sale
decomposed organic material, such as plant remains, used to improve soil
to make water, soil, or another material impure or unsafe by introducing an unwanted substance
the repeated movement and reuse of nutrients between living organisms and the nonliving parts of an ecosystem
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