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.
It also varies with seasonal changes in turbidity. Since the photic zone is where almost all of the photosynthesis occurs, the depth of the photic zone is generally proportional to the level of primary production that occurs in that area of the ocean.About 90% of all marine life lives in the photic zone.he bottommost zone, below the euphotic zone, is called the aphotic zone. Most deep ocean waters belong to this zone. The transparency of the water, which determines the depth of the photic zone, is measured simply with a Secchi disk.