Answer:
B. often use tube feet to move around in their environment
Explanation:
Tube feet are tiny tubular projections of echinoderms on the underside (oral side). They are a member of the echinoderm water vascular system.
Tubular feet are used for feeding, breathing and shifting. They are arranged around the sides, in grooves. They work by hydraulic pressure. They are used to transfer food in the centre to the oral mouth, and may stick to surfaces. Tube feet allow certain animals to stick and travel slowly to the ocean floor. for example starfish uses tube feet for the above functions.
Hence, the correct option is B.
Answer:Una célula pasa por cuatro etapas a lo largo de su vida, que son: el nacimiento, el crecimiento, la diferenciación y la reproducción o muerte celular.
El proceso por el cual nace una célula a partir de otra preexistente se denomina división celular. El mecanismo que da origen a un nuevo individuo, en organismos unicelulares, es decir, organismos formados por una sola célula, se produce para aumentar el tamaño de su población, mientras que en organismos pluricelulares, este proceso funciona para aumentar el número de células y el reemplazo de células que se encuentren dañadas o muertas.
El ciclo celular se define como el conjunto de transformaciones que sufren las células para generar dos células hijas.
Este ciclo está formado por tres fases: la interfase, la mitosis y la ciclo
Blade
Thin, flattened section of a plant leaf that collects sunlight
Petiole
Thin stalk by which a leaf blade is attached to a stem
Mesophyll
Specialized ground tissue that makes up the bulk of most leaves; performs most of a plant's photosynthesis
Palisade Mesophyll
Layer of tall, column-shaped mesophyll cells just under the upper epidermis of a leaf
Spongy Mesophyll
Loose tissue beneath the palisade layer of a leaf
Stoma
Opening in the underside of a leaf that allows carbon dioxide and oxygen to diffuse into and out of the leaf
Guard Cell
Specialized cell in the epidermis of plants that controls the opening and closing of stomata by responding to changes in water pressure
Transpiration
Loss of water from a plant through its leaves
(Got this from my textbook so here)
Answer:
c
Explanation:
all cells do not have an nucleus
Answer:Latitude and ocean currents
