The answer to the question stated above is letter b. <span> <span>a meteor or asteroid colliding with Earth
</span></span> <span>The mass extinction at the end of the Mesozoic Era was caused by </span>a meteor or asteroid colliding with Earth. This was said to happen about 65 million years ago.
Heart,vessels,circulating fluids
D. Producir anticuerpos específicos para un patógeno
<h2>Answer:</h2><h3>Lilies do best in a position of full sun, ideally with their roots in rich and fairly moist, yet free-draining soil or compost. Grow oriental lilies in acidic soil or ericaceous compost, and Asiatic lilies in neutral to alkaline soil or multi-purpose compost and not in gardens because most Garden soils are made from three main components: clay, sand and silt. The ideal soil (or loam) has equal amounts of all three, making a fertile soil that is free draining and easy to dig.Which are nothing but making the sand more rougher.So therefore those lillies will not grow in the garden soil and that is the reason why the lillies never grew</h3><h3 />
Answer:
c. Spindle fibers
Explanation:
In eukaryotic cells, the centrioles are small sets of microtubules composed of tubulin proteins. Moreover, in animal cells, a centrosome is an organelle localized near the nucleus which contains a pair of centrioles. These organelles (centrosomes) are referred to as microtubule-organizing centers. During Anaphase, centrioles move to opposite sides in the cell in order to organize the spindle fibers and separate the chromosomes during cell division.
