parasitic way of life

Which animal leads a parasitic way of life?

Plasmodium is a sort of parasitic protozoa, some types of which cause malaria.

mutually beneficial relationships

Between what organisms the mutually beneficial relationships are formed in nature?

Cohabitation of hermit crabs with anemones is a common phenomenon. For hermit crabs anemones provide protection against enemies. Anemones feed of the remains of food of their owners. Since both the hermit crabs and the sea anemones receive mutual benefit from living together, coexistence is considered as one of the best examples of symbiosis.


What kind of relationships are there between the cuckoo chicks and other chicks in the nest?

Nest parasite. Cuckoo eggs develop faster than the eggs of the host birds - usually 12 days instead of 3 weeks. After 8-10 hours after birth the cuckoo chick begins to form reflex intolerance to everything with which it comes into contact in the nest, and tries to throw everything out of the nest.


Competition in artificial communities arises between

Competition is the relationship of active contest between individuals of the same or different species with similar needs for livelihoods and breeding conditions.

Relationship 2

What is the nature of the relationship between a ladybug and aphids?

The vast majority of ladybugs are predators. Beetles and larvae are very voracious and destroying large quantities of dangerous pests like aphids, psylla, scale insects, scale insects and mites, bring has an enormous benefit to agriculture.

Relationship 3

What type of relationship lies between the fungus and algae in the lichen?

Lichens are complex organisms consisting of fungi and algae, forming a new organism with a new morphological, physiological and ecological properties. The thallus of lichen, fungi and algae are in mutually beneficial symbiosis: alga "provides" the mushroom with organic substances and fungus "protects" the algae from excessive heat and light and "ensures" with water and inorganic salts.

abiotic factor

Which of the following could be an abiotic factor to the bear?

Abiotic environmental factors are a set of inorganic environmental conditions that affect organisms. Under number 1 lies abiotic factor; 2, 3 and 4 are biotic factors.

Leaf fall

Which of the following could be the signal for the onset of leaf fall in the temperate zone plants?

Leaf fall is a biological process of dropping of foliage of plants. In woody plants of temperate latitudes preparation for the autumn leaf fall begins long before the onset of frost due to changes in day length.

symbiotic relationship

Which of the following organism could have symbiotic relationships with an oak?

Boletus edulis and oak form mycorrhiza. The others are the examples of organisms that feed on oak.

biotic factor

The biotic factor for trout will be

Under number 1 (the presence of plankton) lies the biotic factors of the environment, that are living environment factors affecting the vital activity of organisms. Under the numbers 2, 3 and 4 lie abiotic factors.

Natural complex

Natural complex formed by living organisms and their environment is

Ecosystem is a natural complex formed by living organisms (biocoenosis) and their environment (inert, such as the atmosphere, or bioinert - soil, pond, etc.) interconnected by metabolism and energy.

Relationship 7

The relationship between organisms in which individuals of groups (bacteria, fungi, plants and animals) connected with each other by the relationship of the type "food - the consumer" is called

Food chain ​​(trophic chain, supply chain) is the relationship of organisms through the relationship of "food - consumer" type (some serve as food for others). At the same time the transformation of matter and energy occur from producers (primary producers) through of consumers (consumers) to the decomposers (converting dead organic matter into inorganic matter, digestible producers).

symbiotic relationship 2

Between what organisms symbiotic relationships are established?

In nature, one often could found a symbiosis of anemones and hermit crab that live, bringing the benefit to each other. Lion and deer is the example of predation, human and bovine tapeworm - parasitism, amoeba and euglena green - predation.

symbiotic relationship 3

Between what organisms symbiotic relationship are established?

Human and E. coli is an example of symbiosis (but can become a parasitism under certain conditions)
Whale and small crustaceans - predation (filtering).
Human and giardia - parasitism.
Grapes and a snail - operation.

Anthropogenic factor

Anthropogenic environmental factors include

Anthropogenic (human activity) environmental factors include the oil spill in the ocean. 1 - refers to the abiotic factors; 3 and 4 - to biotic factors.

biotic factor 3

Biotic environmental factors include

Biotic environmental factors include change of the community. 1 - the abiotic factor; 2 and 3 are anthropogenic factors.

factor 6

Which of the following factors in the greatest extent limit the growth of the number of birds in the winter?

In the greatest extent the growth of the number of birds in the winter is limited by a small amount of food.

factor 7

Which of the following factors in the greatest extent limits the growth of the steppe possums in dry summer?

To the greatest extent the growth in the number of steppe possums in dry summer is limited by a small amount of food.

factor 8

The factor that limits the distribution of amphibians is

The factor that limits the distribution of amphibians is humidity.


In the dark woods, many plants have bright flowers. The significance of this fact is that these flowers are

In the dark wood, many plants have bright flowers, because these flowers are best visible for pollinating insects