¿Qué semejanzas y diferencias hay entre la reproducción sexual de insectos, aves, mamíferos y peces?​

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?