C. Era del Precámbrico Tardío. El término eón se refiere a dos o más eras geológicas que componen un eón. Se divide principalmente en cuatro eones: Hadeano, Arcaico, Proterozoico y Fanerozoico. Este último incluye las eras Paleozoica, Mesozoica y Cenozoica. El Cámbrico forma parte de la era Paleozoica, la cual fue un período crucial en la escala de tiempo geológico por el repentino desarrollo de una gran diversidad de filos animales. Durante este tiempo, también apareció la primera planta terrestre, lo que fue un avance prometedor para el crecimiento de vegetación en condiciones estacionales adecuadas.
The answer is; D
These structures are identified as plasmodesmata. They play a crucial role in the symplastic movement (meaning through the cytoplasm) of water and various molecules within the plant. A membrane called desmotubule runs alongside the pores of neighboring plasmodesmata. These cells are also essential for intercellular communication.
The retina forms the inner layer of the eye, characterized by a complex network of various types of cells arranged in multiple layers. The primary mechanism for processing in the retina is the lateral interactions between these cells, with lateral inhibition being the most prominent type. Photoreceptors are the cells that capture light and convert it into an electrical signal, comprising cones and rods. Horizontal cells facilitate the lateral spatial interactions between these photoreceptors. Bipolar cells gather information from both the photoreceptors and horizontal cells and convey it to the inner layers of the retina. The retina consists of five stratified layers, including the external plexiform layer, where the lateral inhibition first occurs through horizontal cells that connect with photoreceptors and bipolar cells. This connection allows for modulation of the response of photoreceptors, enabling enhanced contrast and clarity in perceived images, largely due to inhibitory neurotransmitters like GABA. The extent of lateral inhibition is adaptable to light levels, and the gap junctions between horizontal cells and photoreceptors adjust according to light conditions.
Answer:
Bromelain refers to a collection of proteases containing sulfhydryl groups. Each protease consists of amino acids, which are the fundamental components of proteins.
Explanation:
Bromelain:
It is not classified as a singular enzyme. Instead, it comprises a combination of proteolytic enzymes along with phosphatases, glucosidases, peroxidases, cellulases, and glycoproteins. Initially, bromelain was identified as an enzymatic mix derived from pineapple plants (Ananas comosus), but it is now recognized as any protease sourced from the Bromeliaceae family.
Proteins are large molecules made up of amino acid subunits or monomers. These amino acids, linked by peptide bonds, create the intricate structure of enzymes.
