Biology Commons^™

Study Of The Tissues And Tissue Development In The Leaf And Stem Of Lycium Halifmifolium, L., Charles A. Troxel

Bachelors’ Theses

The Matrimony-vines are shrubs with usually spiny branches, rigid in some species, slender and arching or procumbent in others, with small and rather narrow, usually grayish green leaves, and dull-colored whitish, purplish, or violet flowers and scarlet, rarely yellow or black, berries. Most of the species are tender but Lycium halimlfollum, L. chinense, and also Lycium turcomanicum and L. ruthenlcum are hardy and thrive in the north temperate regions.

The Effect Of Theelin Upon The Growth And Development Of The Genital Tracts Of The Female White Rat, Robert H. Grogan

Bachelors’ Theses

This paper has been designed to meet the requirements of a bachelor's thesis. The main substance of the thesis is a reiteration of some of the work done by other men in the field of ovarian hormones with some original work on the part of the author. I have endeavored to prove that theelin controls, to some extent at least, the development of the genital tracts of female white rats. Especial care was taken to follow out in detail the methods used by Doisy and his associates in similar experiments so that I would have a criterion by which to …

A Morphological Study Of Daphniidae, Stanley E. Zawodny

Bachelors’ Theses

Th importance of fresh-water organisms is usually underestimated, especially by the very people who live near bodies of fresh-water and who thus can observe such organisms throughout the year. It is really easier to study minute life forms than it is to study larger organisms, for the former can be examined under all kinds of conditions as experiments are performed upon them. The purpose of this thesis is to give a short survey of the chief type among the fresh-water, Crustaceans, with special reference to morphology.

Heredity In Twinning, Dolores M. Kauffung

Bachelors’ Theses

Identical twins have been tn basis for a large amount of the evidence produced by scientists in upholding the contention that heredity is stronger and more important than environment.

It has been the purpose of this paper and the intention oi' the author to develop this theory and to attempt to discover how far heredity really affects the individual and. to what extent it may be influenced by environment.

Parasitology: With Special Reference To The Frog, Leo M. Boxer

Bachelors’ Theses

Prior to the middle of the sixteenth century the knowledge of parasites, their habits, life-histories and forms as limited to a few external parasites and a few parasitic worms. Previous to the discovery of, and knowledge gained by, the study of microscopic parasites, and the effects produced by them, nearly all diseases were thought of as some sort of punishment for sins committed.

An Introductory Study Of Correlations Existing Between The Weight Of Organs And The Length, Width, And Thickness In Pig Fetuses Of The Same Litter, Michael T. Crowley

Bachelors’ Theses

No studies seem to have been performed on pig fetuses, of the same litter, to determine correlations existing between the weight of organs and other types of measurements of the same organs.

Contributions To The Anatomy Of The Mature Larva Of Papilio Polyxenes Fab. (Lepidoptera: Papilionidae), Ernst J. Dornfeld

Bachelors’ Theses

Thia study was undertaken with the purpose of gathering more comprehensive information on the larval anatomy of a typical member of the lepidopterous family Papilionidae. Except for investigations dealing with the osmeteria, literature on the general anatomy of this otherwise well known family is very scant. Because of the relatively small number of speci­mens that were available for study, this paper has been limi­ted to a discussion of the external anatomy and of the gross . morphology of the digestive tract, the urinary system, the silk glands, and the mandibular glands. Important papers in which these structures have been …

Trichomonas Fulicae Sp. Nov. From Fulica Americana, Elizabeth G. Lash

University of the Pacific Theses and Dissertations

Numerous trichomonad flagelletes from the intestines or various birds have been described; but as fas as the writer has been able to discover, none from the intestine of the coot, Fulica americana. Martin and Robertson (1911) described Trichomones eberthi and T. gallinerum from the caecum of fowls; Kotlan (1923) described Tetratrichomonas avatis from the caecum of ducks; Tyzzer (1930) described flagellates from the ruffed grouse.

However, the species described by the above authors are quite different from Trichomonas to be described in this paper. This organism is definitely a member of the genus Trichomonas since it possesses the distinguishing characteristics …

Origin Of The Limb Musculature In The Mouse., R Wendell Coffelt

Electronic Theses & Dissertations

One of the most important and much disputed questions in the field of developmental anatomy is the role the myotomes play in the development of the limb musculature. At present there are two explanations advanced concerning the development of the limb-musculature in mammals. The first is that limb-buds arise as local thickening of the somatopleure, which becomes filled with a homogeneous syncytial mesenchymal tissue, that later becomes innervated with muscle-buds from the myotomes and with blood vessels, and nerves from the trunk of th embryo. The second method explained as to the origin of limb muscles is that they are …

Sporogenesis In Riccia Natans L., Mary Fortunata

Bachelors’ Theses

Until comparatively recent years little, comprehensive Cytological work had been done on the lower forms of plant life including the Liverworts. Cavers (1903) stated that Micheli in 1729 named a species "Hepaticae fontana" because of the supposed resemblance between the branched thallus and the lobes of the liver, and although this species was later named "Fegatella conica", the name "Hepaticae" has, since then, been applied to the whole group of Liverworts. Between 1850 and 1862 Hofmeister demonstrated "Alternation of Generations" in this group, and it was this characteristic that distin­guished them permanently …

The Reaction Of Salts On The Regional Muscular Activity Of The Earthworm, Ernest D. Habeger

Electronic Theses & Dissertations

Though a great amount of work has been done concerning the effects of salts upon the organic constituents of all muscular tissues of the earthworm, very little has actually been accomplished showing the effect of salts on the rhythmic contractions of that animal. However, the normal peristaltic activity of the muscles of the earthworm has been shown to represent a characteristic behavior from its anterior to its posterior extremity.

It is the purpose of this investigation to demonstrate the effects of various concentrations of salts on this normal rhythmic activity of the various regions of the earthworm.

A Study Of Some Species Of Pediastrum And Scenedesmus, Irene Cull

Bachelors’ Theses

Although regarded by the untrained observer as slime, filth and scum, algae are fascinating to the botanist who has become interested in them. Algae are found everywhere; they are our commonest water plants. Among the green algae we have some of the most beautiful and fascinating forms in the plant kingdom and undoubtedly Pediastrum and Scenedesmus, the two genera studied, are among the most beautiful of all.

Values To Be Derived From A Study Of Biology, Florence J. Kane

Bachelors’ Theses

My problem was to discover what scientists, educators, and people interested in the teaching of biology considered the most important values to be derived from a, study of this subject.

The Genesis Of Tetanus And Characteristic Features Of A Single Muscular Contraction, Clarence S. Livingood

Biology Honors Papers

This 25 page thesis discusses experimental work on muscle stimulation to produce complete tetanus.

The Pituitary, Thyroid, And Adrenal Glands Of The Opossum, Max F. Drozewski

Bachelors’ Theses

In recent years a great deal has been written on the endocrine glands. However most of the articles deal with the physiological function of the various ductless glands only. Very little of this literature deals with the anatomical structure of the organs themselves. In this thesis we shall discuss the anatomical structure of the endocrine glands namely, the Pituitary(hypophysis), Thyroid and the Adrenal of a marsupial. The work has been done on the opossum of the virginia species, Didelphis virginiana. Only two specimens were available for dissection.

The Spleen Histology And Differences In Functions, John Shakula

Bachelors’ Theses

In delving into the literature concerning the Spleen one is greatly surprised to find so much diversity of opinion concerning its origin, histology and functions.

The Endocrine Glands And Their Secretions, Eldred M. Moehrke

Bachelors’ Theses

In the following work the endocrine system was considered in general with special emphasis on the thyroid and para-thyroid glands. In some manner,which we do not well understand,the thyroid and the para-thyroid glands affect the other ductless glands and it is this relationship that is stressed.

General Morphology And Physiology Of The Urogenital System Of The Opossum, Robert Schuster

Bachelors’ Theses

From the very first, I wish the state that the title, "General Morphology and Physiology of the Urogenital System of the Opossum," is not entirely descriptive of the text which is to follow. However it is as nearly descriptive as I could hope to make it.

It seems that during the history of biological research the workers have done comparatively little work on the Opossum. This neglect was probably due to its inaccessibility, since it is found only in Australia and in the semitropic regions of North America. In the nineteenth century the eminent authority on anatomy, Sir Richard Owen, …

The Distribution And Economic Significance Of The Genus Polygonum In Sacramento County Of California, Helen Keech Mccarthy

University of the Pacific Theses and Dissertations

The genus Polygonum belongs to the family of plants, the Polygonaceae, which includes about forty genera and seven hundred and fifty species. About two hundred end seventy-five of these belong within Polygonum. Scientists have also found distinctly recognizable fossil Polygonums which date from prehistoric ages. Dr. F. H. Knowlton¹ of the U. S. National Museum has listed twelve species which have been found in fossil form. While studying collection of Colorado fossil plants in the Geological Tunes et Columbia College, Small discovered a remarkably distinct Polygonum belonging to the subgenus Persicaria.

A Study Of Poverty And Dependency In Phelps County For 1931, Arthur Royal Powell

Masters Theses

"The Ozark Region of Missouri is rapidly undergoing a definite social and economic change. thru markedly improved methods of communication and transportation the eighteenth century culture of this region is being metamorphosed into a twentieth century culture. Where the Ozarker of a generation ago was a strongly individualistic frontiersman in his outlook on life, he is now in the process of becoming a citizen of a larger and more complex society. The telephone, the radio, and the concrete highway, together with the cheap automobile, have made the customs and many of the folkways and mores of the Ozark people obsolete, …

The Ethnobotany Of The Acoma And Laguna Indians, George R. Swank

Biology ETDs

The Indian lives close to nature and utilizes the plants which grow about him, and these uses differ among various tribes. In order therefore to understand the ethnobotany of any group of Indians it is necessary to know something of their history, customs, mythology, religion and medicine. Hence in treating the ethnobotany of the Acoma and Laguna Indians the above phases of their culture will be discussed as they relate to these two pueblos.

The Scaled Quail Of New Mexico, Paul Russell

Biology ETDs

Within the past thirty years much has been done by the New Mexico Game and Fish Commission for the protection and increase of Game. Market hunting is a thing of the past, as we have controlled seasons and bag limits. Species have been maintained and increased by establishing refuges and in some cases species reestablished by transplanting.

The Development Of The Archegonium Of Marchantia PolymorphumL., Mary Virginia Braukman

Bachelors’ Theses

Marchantia polymorphum L. grows commonly under moist conditions, in ravines or along the sides of ditches, banks of streams, and in other similar places. It can be found in what appear to be quite dry situations, though it is more nearly correct to state that it can exist through more or less prolonged dry periods. It grows actively only when conditions are comparatively moist. Marchantia reaches its best development on damp burnt-over wooded places. Marchantia polymorphum L. appears as a flat dichotomously branched thallus, closely pressed to the substratum on which it grows. The thallus is selt-supporting, possessing chlorophyll, and …

The Botany Laboratory, Saylor John Neher

Master's Theses or Doctor of Nursing Practice

In the present work it has been my purpose to present a descriptive list of laboratory exercises in botany which is predictable and useable under the existing conditions of the average small high school of western Kansas. To be more specific these exercises may be used by a teacher without special training in botany, in a crowded curriculum, and with little laboratory equipment. Most of the apparatus needed may be improvised by the pupil, and the plants called for are common in any community in the western half of Kansas.

How Far Is The Argument Of Homology Acceptable To Reason, Wilmur Daniel Ackerman

Bachelors’ Theses

Evolution is a subject that involves a great deal more than the average person really thinks about. To approach subject like this, one must try to obtain as many of the different factors that taken into consideration as is possible.

A Study Of Intersexuality As Exhibited In Animal Forms, Ida V. Jaggard

Biology Honors Papers

This 21 page thesis discusses the entire scope of animal intersexuality with examples illustrating certain types of intersexuality. Much of the thesis is based on the works of F. A. E. Crew and Alexander Lipschutz.

The Spleen Considered With Special Reference To Its Functions, Louis J. Schmidt

Bachelors’ Theses

In arranging this thesis an attempt has been made to show that by virtue of its embryology, anatomy and histology, the spleen is the better enabled to carry out its alleged functions. The discussion here presented is confined to a story of the functions of the mammalian spleen alone. The similarities in the reactions of the spleen in the various mammalia is quite evident. Experimentation and observations were carried out on the lower mammalia while only the reactions of the splenectomized humans could be observed.

The Distribution And Economic Value Of The Chenopodiaceae Of San Joaquin County, California, Ralph Stiles Raven

University of the Pacific Theses and Dissertations

Plants of this family which contains about seventy four genera and five hundred end fifty species widely distributed over the world, are known by several common names, such as pig weed, goose foot, and salt bush. They are primarily plents of alkaline or saline soil and co such a unique purpose in the plant real thriving where it is impossible for other plants to grow. The term "salt bush" according to G.L. Bi-well, is more specifically applied to a group of individuals having a pronounced salty tante, a majority of which belong to the botanical genus Atriplex. This group contains …

The Natural Factors In The Selection Of Diet., Lamar William Neblett

Electronic Theses and Dissertations

No abstract provided.

The Effect Of Potassium-Iodide On The Embryological Development Of The Chick With Special Reference To The Growth Of The Long Bones., David M. Polot 1904-1978

Electronic Theses and Dissertations

No abstract provided.