SOME GOOD PLANT DEMONSTRATIONS THAT ARE NOT INCLUDED IN THE USUAL TEXT-BOOKS
نویسندگان
چکیده
منابع مشابه
Why are some books important (and others not)?
The book Why Are Some People Healthy and Others Not? The Determinants of Health of Populations represented a milestone in our evolving understanding of the determinants of population health. Building on Marc Lalonde's earlier A New Perspective on the Health of Canadians, it created a theoretical framework that could incorporate emerging evidence from a wide range of disciplines. Central to its ...
متن کاملLarge generalized books are p-good
Let B (r) q = Kr−1 + qK1 be the graph consisting of q distinct r-cliques sharing a common (r − 1)-clique. We prove for p ≥ 2, r ≥ 3 fixed and q large r ( Kp+1, B (r) q ) = p (q + r − 2) + 1.
متن کاملMitochondrial DNA barcoding detects some species that are real, and some that are not.
Mimicry and extensive geographical subspecies polymorphism combine to make species in the ithomiine butterfly genus Mechanitis (Lepidoptera; Nymphalidae) difficult to determine. We use mitochondrial DNA (mtDNA) barcoding, nuclear sequences and amplified fragment length polymorphism (AFLP) genotyping to investigate species limits in this genus. Although earlier biosystematic studies based on mor...
متن کاملSome classes of graphs that are not PCGs
A graph G = (V, E) is a pairwise compatibility graph (PCG) if there exists an edge-weighted tree T and two non-negative real numbers dmin and dmax, dmin ≤ dmax, such that each node u ∈ V is uniquely associated to a leaf of T and there is an edge (u, v) ∈ E if and only if dmin ≤ dT (u, v) ≤ dmax, where dT (u, v) is the sum of the weights of the edges on the unique path PT (u, v) from u to v in T...
متن کاملGood Programmers are Not Lazy
In this article I provide a practical analysis of programming practices and education. The phrase “Good programmers are lazy” is very often offered to students as a guide to good programming. This statement is very wrong and reflects some of the problems with attitudes in computer science today. 1 Lazy Programmers are
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: School Science and Mathematics
سال: 1910
ISSN: 0036-6803
DOI: 10.1111/j.1949-8594.1910.tb00230.x