Lineage in Biological Definition

Parthenogenesis

... produce offspring. This means that an asexual lineage will have roughly double the rate of population ... particularly defenseless against it, an asexual lineage is more likely to be completely wiped out by it. In contrast, a lineage that reproduces sexually has a higher probability ...

Species

... a group of organisms that shares an ancestor; a lineage that maintains its integrity with respect to ... species concept. Both agree that a species is a lineage that maintains its integrity over time, that is ... it), is reproductively isolated (else the lineage would merge into others, given the chance to do ...

Apoptosis

... in genetics and in the development of the nervous system, but cell lineage and differentiation inevitably led to the study of cell fate: "One aspect of the cell lineage particularly caught my attention: in addition to the 959 cells generated ...

Human

... difference of less than 1 per cent. It has been estimated that the human lineage diverged from that of chimpanzees about five million years ago, and from ... seven million years old already showing a divergence from the ape lineage suggests an earlier divergence. Human evolution is characterized by a ...

Alga

... 70 m in length ( kelps )—the red algae , and the green algae . The most complex forms are found among the green algae (see Charales ), in a lineage that eventually led to the higher land plants. The point where these non-algal plants begin and algae stop is usually taken to be the presence of ...

Bone

... They contain alkaline phosphatase - a chemical which has a role in the mineralisation of bone. Bone Lining Cells (BLCs) share a common lineage with osteogenesis (bone forming) cells. They function as a barrier for certain ions, induced osteogenetic cells. They are flattened, mononucleate ...

BLAST

... faster. Examples of other questions that researchers use BLAST to answer are Which bacterial species have a protein that is related in lineage to a certain protein whose amino-acid sequence I know? Where does the DNA that I've just sequenced come from? What other genes encode ...

Cryptozoology

... fossil " believed to have been extinct for 65 million years, was caught in a fishing net in 1938 off the coast of Africa . Of an even older lineage than the coelacanth are the Graptolites . Living representatives were first found in 1882 , although the group had previously been presumed to have ...

Endosymbiont

... Bacterial endosymbionts in echinoderms: Subcuticular bacteria from the brittle star Ophiactis balli (Echinodermata: Ophiuroidea) represent a new lineage of extracellular marine symbionts in the alpha subdivision of the class Proteobacteria. Burnett, W J and J D McKenzie ...

Endosymbiont

... Bacterial endosymbionts in echinoderms: Subcuticular bacteria from the brittle star Ophiactis balli (Echinodermata: Ophiuroidea) represent a new lineage of extracellular marine symbionts in the alpha subdivision of the class Proteobacteria. Burnett, W J and J D McKenzie ...

Evolution

... . Some fossils bear a resemblance to organisms alive today, while others are radically different. Fossils have been used to determine at what time a lineage developed, and can be used to demonstrate the continuity between two different lineages through transitional fossils . Paleontologists ...

HeLa

... do not die of old age and can divide an unlimited number of times, unlike most other human cells), and have been grown in cell culture in an unbroken lineage ever since. This cell line was propagated for use in cancer research . Initially, the cell line was said to be named after a "Helen Lane", in ...

Alga

... 70 m in length ( kelps )—the red algae , and the green algae . The most complex forms are found among the green algae (see Charales ), in a lineage that eventually led to the higher land plants. The point where these non-algal plants begin and algae stop is usually taken to be the presence of ...