YUEDLIVIT
How long is the fetal period?
Ofrom the second until the eighth week after conception
from the midway point of prenatal development until birth
from nine weeks after conception until birth
the last three months before the child's birth

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

answer: c

explanation:

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.