Sine, cosine and tangent functions are periodic functions, meaning they repeat themselves at regular intervals. This interval of repetition is known as the period of the function, and this periodicity ...

This study provides valuable findings on the role of site-specific DNA methylation changes during spermatogenesis and their contribution to paternal epigenetic inheritance. The study proposes that ...

Scientists have attempted to map the human cell since the first microscope was invented more than 400 years ago. But many ...

Make sure you can plot graphs of linear equations and recognise the equation of a line from a graph before looking at graphs of inequalities. Watch this video to find out how to solve inequality ...

This important study shows, for the first time, the structure and snapshots of the dynamics of the full-length soluble Angiotensin-I converting enzyme dimer. The combination of structural and ...

Families believe it is a bad omen to stay indoors on the final day of Nowruz [File: Raheb Homavandi/Iran Society via Reuters] What is the significance of the Haft Sin table? The Haft Sin table ...

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No team or prospect is safe when Jason Fitz and Frank Schwab fire off all of their hottest draft takes. The NFL Draft is fast approaching, and this year's class is taking shape. Here's Charles ...

(a) A function f defined on N, the natural numbers, as f(n)=2n; n∈N. Then f is (A) one-one and onto (B) one-one but not onto (C) not one-one and not onto (D) onto but not one-one ...

The main function of the aorta is to supply blood to almost all the major organs in the body through the smaller arteries that arise from it. There are several conditions with serious complications ...