Life cycle Sentence Examples

Parthenogenesis is of normal occurrence in the life-cycle of many Hymenoptera.

Generally the larval is the feeding, the imaginal the breeding, stage of the life-cycle.

In one of the best-known species, Cicada septemdecim, from North America, the life-cycle is said to extend over seventeen years.

The difficulty of tracing the relationships of algae is largely due to the inadequacy of our knowledge of the conditions under which they pass through the critical stages of their life-cycle.

In fresh-water Hydromedusae the life-cycle is usually secondarily simplified, but in marine forms the life-cycle may be extremely complicated, and a given species often passes in the course of its history through widely different forms adapted to different habitats and modes of life.

It is quite possible that some of these medusae will be found to be truly hypogenetic, that is to say, with a life-cycle secondarily simplified by suppression of metagenesis.

In the first place, we find in this group two distinct types of person or individual, the polyp and the medusa (qq.v.), each capable of a wide range of variations; and when both polyp and medusa occur in the life-cycle of the same species, as is frequently the case, the result is an alternation of generations of a type peculiarly characteristic of the class.

Leger (32, 33) and others, that leeches are true alternate hosts for these forms, in which certain phases of the life-cycle are normally undergone.

Nevertheless, the fact, commented upon by several observers, that even here an infected fly is only infectious for a comparatively short period suggests that this species of fly, at any rate, is not the true alternate host in which the life-cycle of that particular Trypanosome is completed.

It is impracticable here to consider fully all the various developmental phases and modifications of the life-cycle described as occurring in the above parasites.

That being so, it is quite possible that, in normal conditions and circumstances, these parasites also possess, at some period of the life-cycle, a trypaniform phase.

The sexes almost immediately couple; the female in from four to six days lays her eggs, numbering 500 and upwards; and, with that the life cycle of the moth being complete, both sexes soon die.

In this connexion he established the very important practical conclusion that worms which contract the disease during their own life-cycle retain sufficient vitality to feed, develop and spin their cocoon, although the next generation is invariably infected and shows the disease in its most virulent and fatal form.

Their life-cycle, however, the structure of the reproductive organs and their whole organization proclaim them to be Bryophyta.

There thus seems to be no justification for believing, as Schmitz taught, that a second sexual act occurs in the life-cycle of these Florideae.

But it is clear that it becomes on this view increasingly difficult to explain the occasional occurrence of tetraspores on male, female and monoecious plants or the role of the carpospores in the life-cycle of Florideae.

Woronin, that these authors had included in the life-cycle stages of a.

A number of facts regarding the Algae, and also those relating to such deviations from the normal life cycle as apogamy or apospory, may be regarded as lending support to this view, which, in contrast to the theory of antithetic alternation, has been called that of homologous alternation.

During the life cycle of any thing, it experiences the vicissitudes of life.

Perhaps the less hostile environment of a habitable moon orbiting a brown dwarf would help to extend the human life cycle.

Car park nearby has display about life cycle of the salmon.

Some common weed plants, e.g. dandelion and thistle go through their life-cycle fairly quickly.

In any civil engineering hydraulics projects, water represents a constraint, a risk on the life cycle of the infrastructure.

The role will cover the project life cycle from design specifications through to post-release support.

Maria A lovely sequence of balances and traveling movements in gymnastics Matthew Clearly described the human life cycle.

The time it takes a flea to complete this life cycle is extremely variable.

Throughout the entire life cycle of a product engineers are frequently required to predict how changes could propagate.

Most importantly we must take into account the costs in terms of the ' whole life cycle ' of the product.

Their complex life cycle is explained and what they feed on.

For all other immortals, they get only one shot at a mate in its life cycle.

While the majority of the Nematodes are parasites, there are many that are never at any period of their life parasitic. These free-living forms are found everywhere - in salt and fresh water, in damp earth and moss, and among decaying substances; they are always minute in size, and like many other lower forms of life, are capable of retaining their vitality for a long period even when dried, which accounts for their wide distribution; this faculty is also possessed by certain of the parasitic Nematodes, especially by those which lead a free existence during a part of their life-cycle.

The Trachylinae, on the other hand, are above all oceanic forms, and have no polyp-stage, and hence there is typically no alternation in their life-cycle.

In all the abovementioned genera, with the exception of Hydra, the life-cycle is so imperfectly known that their true position cannot be determined in the present state of our knowledge.

It has a short life cycle and a high reproductive rate, it has many easily distinguishable mutants and is comparatively easily handled.

Roots Roots are indeterminate organs that continue growing throughout the plant life cycle - an ideal experimental system to study patterning.

Much of their life cycle is spent as vegetative mycelium, exploiting complex substrates.

They describe the life cycle of the mosquito parasite plasmodium.

His studies of the life cycle of the rust fungus convinced him that the germinating spores represented a vulnerable stage for attack.

They are actually giant grasses but differ by having woody stems or culms and a unique life cycle.

The co-existence of the asexual encysted form and the sexually mature adult in the same host, exceptionally found in 011ulanus and other Nematodes, is the rule in Trichinella; many of the embryos, however, are extruded with the faeces, and complete the life cycle by reaching the alimentary canal of rats and swine which frequently devour human ordure Swine become infested with Trichinella in this way and also by eating the dead bodies of rats, and the parasite is conveyed to the body of man along with the flesh of "trichinized" swine.

The life-cycle of the Leptolinae consists of an alternation of generations in which non-sexual individuals, polyps, produce by budding sexual individuals, medusae, which give rise by the sexual process to the non-sexual polyps again, so completing the cycle.

It is commonly assumed that the Trachylinae are forms which have lost the alternation of generations possessed by them ancestrally, through secondary simplification of the life-cycle.

Brooks [4], who adduces strong evidence for a contrary view, that is to say, for regarding the direct type of development seen in Trachylinae as more primitive, and the metagenesis seen in Leptolinae as a secondary complication introduced into the life-cycle by the acquisition of larval budding.

In the first place, the normal life-cycle of plants and animals exhibits what is known as alternation of generations, so that any individual in the chain may resemble its grand-parent.

To this life-cycle belongs the formation of sexual individuals and their conjugation on arrival in the gnat (Culex); the process is described as agreeing in the main, in both cases, with what has already been made known by MacCallum for another species of Halteridium.

This does not, however, preclude in any way the supposition that they-equally with certain other Haemosporidia-represent, nevertheless, only a phase of a complete life-cycle; and this supposition has in fact been definitely proved to be true by the work of Rogers (48).

Freshwater pearl mussels need healthy salmonid populations to complete their life cycle.

Click here to see more about the malarial life cycle.

They should be of sufficient quality, culturally appropriate and sensitive to gender, life-cycle and privacy requirements.

There has been no attempt to standardize the format of each entry such that all aspects of the life cycle are covered.

The trypanosome life cycle in the fly is regulated by symbiotic bacteria in its gut into which it is possible to insert foreign genes.

Female rice weevils lay between 300 to 400 eggs, with the life cycle requiring about 32 days for completion.

Then they continue their life cycle through the kittens.

Tapeworms generally begin their life cycle on a flea and then migrate into the cat's digestive system when she grooms herself and ingests the flea.

It is important to understand the life cycle of the flea.

A safer way to break the flea life cycle in your home is to vacuum thorougly on a daily basis, and make sure your vacuum beneath furniture and under cushions as well.

Although this treatment plan takes over a month, it is the best way to interrupt the life cycle of cat ear mites and make sure your pet is not reinfested.

Adolescence is the stage of the life cycle between the ages of 11 and 21.

The tick's life cycle passes through four stages.

Larvae is the next stage in the tick's life cycle.

When they've finished their meal, they'll simply drop off their host and begin the next stage of their life cycle.

Intestinal worms are parasites that live out their life cycle in a dog's digestive tract.

These pests can temporarily survive on alternative blood sources, but their life cycle quickly comes to an end without their canine hosts.

Humidity is a key component to the dog fleas' life cycle.

Any raw meat may harbor worms that can continue their life cycle in your dog's digestive tract.

The majority of the flea infestation is made up fleas in various life cycle stages, meaning eggs, larva or the pupa.

Heartworm Disease, Emergence and Spread covers the general history, life cycle and development of heartworm disease in affected animals.

Phenology is the study of natural life cycle events of wild plants and animals.

The efficiency of pesticide may be increased by more precise timing of the application based on the life cycle of the pest or weed.

Menopause is a natural part of the woman's life cycle.

A bite from a tsetse fly is all that's needed to transmit the protozoa, but the parasite's life cycle in a person is very distinct.

With the system's life cycle expected to extend for at least a few more years, the PS3 will surely have more shooting games for you to buy today and into the future.

Finally, the game is saddled with painfully long load times -- unforgivable at this point in the PS2's life cycle.

The entire life cycle lasts four to six weeks.

It is best if parents are proactive about the challenges of this life cycle stage, particularly those that pertain to the possibility of experimenting with and using alcohol and drugs.

The life cycle of chlamydia is 72 hours.

It is best if parents are proactive about the challenges of this life cycle stage, particularly those that pertain to the possibility of experimenting with and using tobacco.

People who have survived the chaos of personal despair or abuse might like a peaceful tattoo depicting the butterfly's secure and cardinal life cycle.

All a shamrock asks is occasional water, some sunlight and a regular pruning. the life cycle of a shamrock is such that the stems turn brown regularly, so you have to get rid of those.

However, it is more common for a product to fail later during its specific life cycle.

Male mosquitoes get their nutritional needs from plant nectar, whereas the female mosquitoes rely on blood protein so they can mature their eggs and carry on the reproductive life cycle of the insect.

Bug carcasses - During the life cycle of the bug, molting occurs and carcasses may get left behind under and at the corners of mattresses.

To completely rid your home and surroundings of bedbugs, it helps to understand the life cycle of these parasitic pests.

Take a look at the life cycle of these parasites and learn how to get rid of bed bugs for good.

Bed bugs can go several months without food, so be sure to treat their life cycle accordingly.

It is, on the other hand, a danger in the opposite sense to conclude that all Chantransia species are stages in the life-cycle of other plants, and, similarly, that all irregular colonial forms, like Palmella, represent phases in the life of other Green Algae.

The continuous nature of the knots may also represent the life-cycle of all living things as well as the circular (never ending) pattern of life and spiritual growth.