The determinant is a real number, it is not a matrix. The determinant can be a negative number. It is not associated with absolute value at all except that they both use vertical lines. The determinant only exists for square matrices (2Ã2, 3Ã3, ...
Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest. Phytoplankton, also known as single-celled plants, grow in water-bodies and are similar to terrestrial plants in many ways. Since they require sunlight for photosynthesis, these plants usually grow on the surface of water, in the photic zone, where sunlight can penetrate. These plants also require other nutrients such as nitrate, magnesium, zinc, etc to grow.
Most phytoplankton are too small to be individually seen with the unaided eye. Phytoplankton, like plants, obtain energy through a process called photosynthesis, and so must live in the well-lit surface layer of an ocean, sea, or lake. Through photosynthesis, phytoplankton (and terrestrial plants) are responsible for much of the oxygen present in the Earth's atmosphere. Their cumulative energy fixation in carbon compounds (primary production) is the basis for the vast majority of oceanic and some freshwater food chains.