Organelles are moved within the cytoplasm by being pulled along microtubules by the motor proteins and organelles are moved within the cytoplasm by being pulled along microtubules by the motor proteins and dyneins; kinesins

Answer;

-Dyneins; kinesins

Organelles are moved within the cytoplasm by being pulled along microtubules by the motor proteins dyneins and kinesins.

Explanation;

-Microtubules are responsible for a variety of cell movements, including the intracellular transport and positioning of membrane vesicles and organelles, the separation of chromosomes at mitosis, and the beating of cilia and flagella.

-One of the major roles of microtubules is to transport membrane vesicles and organelles through the cytoplasm of eukaryotic cells. dyneins are motor proteins that move towards the minus end of the microtubule. Thus, they transport cargo from the periphery of the cell towards the center.

-Active movement of kinesins along microtubules supports several cellular functions including mitosis, meiosis and transport of cellular cargo, such as in axonal transport.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: