These species contain all three within the population: males, females, and hermaphrodites. This is relatively common in plants where a single plant will possess male, female and hermaphroditic flowers all on one organism. In Figure 1 below we see the papaya plant which can contain all three ...
The concept of population is not exclusive to the field of Biology. We can find the ubiquitous use of the term “population” every now and then. Let’s try to understand and define the word “population” as per its usage. Let’s understand what population means in different fields of s...
Changes in RNAs from L1 and IAP families and subfamilies. The RPMs of RNAs mapping to L1 or IAP elements (all), active subfamilies and FLI only are shown. Data are the mean values of two (Mov10l1+/+) and three (Mov10l1–/–) ...
These cells represent a specialized fibroblast population involved in collagen secretion and thus in the development and progression of interstitial fibrosis, which is the major cause of the disease in different tissues. Early lineage-tracing studies supported the hypothesis that myofibroblasts arise from ...
In addition to describing recent developments in specific fields, the previous chapters demonstrate a common theme, that the solutions to practical problems have not involved the ready application of a set of firm principles of population biology. Here w
Maternal investment influences the survival and reproduction of both mothers and their progeny and plays a crucial role in understanding individuals’ life-history and population ecology. To reveal the complex mechanisms associated with reproduction and
(a) What is the term source population? (b) Briefly describe its significance in understanding the distribution and abundance of species. What is the biological definition of a species? What can humans do to limit human population growth?
Population Regulation in an Ecosystem With regard to the population size of a species and what factors may affect them, two factors have been defined. They are the density-dependent factors and the density-independent factors. Find out the differences between the two in this tutorial. Know how ...
Density-dependent regulation: That in any ecosystem, there will be factors that will regulate population growth, such as biotic interactions (competition, predation, disease, etc.), resource availability, and natural factors (e.g., floods, fires, etc.), that will stabilize populations Succession:...
et al. Cell population structure prior to bifurcation predicts efficiency of directed differentiation in human induced pluripotent cells. Proc. Natl Acad. Sci. USA 114, 2271–2276 (2017). CAS PubMed PubMed Central Google Scholar Mojtahedi, M. et al. Cell fate decision as high-dimensional ...