Amino acids speed up or slow down the chemical reactions of organisms
I think it’s A or c but I’m not so sure
Answer:
1) The general characteristics of kingdom plantae are as follows −. Multicellular organisms with walled and frequently vacuolated. Eukaryotic cells. Contain photosynthetic pigments which are present in plastids. They are autotrophic mode of nutrition. Plants are non-motile, live anchored to a substrate. Autotrophic
: All plants are autotrophic, making and producing their own food and nutrients, without needing others to provide it for them.
Multicellular
: All plants all multicellular, meaning they are composed of more than one cell, which is what makes them visible to our naked eyes.
Eukaryotic: All plants are eukaryotic, meaning their cells all contain a nucleus, which is one of the organelles of the cell surrounded in a cell membrane. four characteristics that distinguish land plants from charophyte algae.
2) Alternation of generations (w/ an associated trait of multicellular, dependent embryos), walled spores produced in sporangia, multicellular gametangia, and apical meristems. These are evolved traits of land plants. Not all plants have retained these traits.
Explanation:
I added explanations inside the answer. I hope it make sense.
A cell membrane is semi-permeable. This means that it is size-specific. It allows only a particular maximum size of particles to pass through it. Large molecules such as plasma proteins and lipid molecules cannot therefore penetrate while small moecules such as glucose will easily diffuse across it.
Secondly, a cell membrane is charged. The charge is as a result of a difference in ionization between the intracellular fluid and the extracellular fluid. Substances that have the same charge as the fluid into which they are diffusing will be hard to asorb due to repulsion effect. On the other hand, substances that have opposite charge as the fluid into which they are diffusing will be absorbed easily and faster.
Finally, the cell membrane is made of two layers. Lipid layer and phospholipid layer. Inside these layers, there are embedded particles and substances such as enzymes, receptors, hormones and ion channels. During diffusion of substances across cell membrane, some substances are speeded up by these substances. For instance, Translocase enzyme in the membrane of mitochondria speeds up the transfer of Carnitine transferase into the mitochondrial matrix.
