Results 181 to 190 of about 68,621 (218)
Asexual reproduction in acoelous Turbellaria.
The Yale journal of biology and medicine, 1998 openaire +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Asexual reproduction of planarians: Metric studies
Russian Journal of Developmental Biology, 2006A relationship was studied between fission and restoration of body and its individual parts under different experimental conditions in planarians of the Dugesia tigrina asexual race. The body and its fragments were studied morphomterically. After fission, the growth of planarians demonstrated topographic differences.
I M, Sheĭman +3 more
openaire +2 more sources
Asexual Reproduction in Coleochaete
Botanical Gazette, 19281. The opening through which the swarm spore escapes is made by some chemical change, probably enzymatic, which is initiated and controlled by the chloroplast. 2. Zoospores escape by an amoeboid movement through a pore. 3. There is a period of quiescence after the escape of the spore, at the end of which the cilia appear. 4.
openaire +1 more source
Asexual reproduction in nonmarine ostracods
Heredity, 1998Asexual reproduction has evolved repeatedly in nonmarine ostracods and takes a variety of forms from ancient asexuals to species in which sexual and asexual lineages coexist. Clonal diversity is highly variable. There is evidence that some of this diversity is maintained by ecological differentiation. Hybridization between asexual females and males, of
ROGER BUTLIN, ISA SCHÖN, KOEN MARTENS
openaire +1 more source
Asexual Reproduction in a Sipunculan Worm
Science, 1970The sipunculan worm Aspidosiphon brocki reproduces asexually by transverse fission into two unequal parts, the smaller part comprising the posterior fifth of the animal. Prior to fission each part regenerates the structures essential to the formation of a new individual.
openaire +2 more sources
Asexual Reproduction or Apomixis
1964Reproduction is asexual (apomictic) when it occurs without recombination. Apomixis (Greek apo = without, mixis = mingling) is the general term for it. The simplest case is found in unicellular plants and animals where there is doubling of cytoplasmic contents and replication of genetic material followed by division of the cell into two parts.
openaire +1 more source
Asexual reproduction in Phytophthora erythroseptica
Transactions of the British Mycological Society, 1966Sporangia are readily produced by Phytophthora erythroseptica Pethybr. when mycelial mats are grown in pea broth, washed and transferred to shallow layers of water or Petri's solution. Sporulation occurs between 8 and 26 ° C., (opt. c . 18–22 ° C.). Aeration of water is not necessary for sporangial production.
Radmila Vujičić, John Colhoun
openaire +1 more source
Growth and asexual reproduction
1971Growth is increase in biomass. In protozoa and protophyta growth in an organism to a critical size is followed by division into independent daughter organisms. Thus growth is also growth in the number of organisms in a colony. If an inoculum of micro-organisms is placed in a culture medium and sampled at intervals the growth curve of the culture can be
openaire +1 more source
Queen Succession Through Asexual Reproduction in Termites
Science, 2009The evolution and maintenance of sexual reproduction may involve important tradeoffs because asexual reproduction can double an individual's contribution to the gene pool but reduces diversity. Moreover, in social insects the maintenance of genetic diversity among workers may be important for colony growth and survival.
Kenji, Matsuura +6 more
openaire +2 more sources