Which trait was most important in the development and advancement of modern fish? a) a lower jaw b) eggs with shells c) 4-chambered heart d) live birth of young

A. a lower jaw. hope this helps

Answer: Option A - A lower jaw.

Explanation:

The earlier fishes used to be jawless (Agnathans).The most important trait used in the development of advanced fishes was the development of lower jaw.This lower jaw was primarily developed to facilitate the biting. Later on the complete jaw was developed which facilitated first in breathing and then was utilised for feeding.  

Schools are being forced to embrace computers. unlike their "digital immigrant" teachers, these students are "digital natives", born into a world where technology is an integral part of everyday life. almost every student has access to a multitude of computers, laptops and tablet devices. it would be crazy to assume an assignment would  notbe written on computer in this day and age.many schools now have a 1-to-1 computer policy, and many districts and states in the united states have mandated computers or ipads across the state for every student,  including los angeles, the second largest school district in the country.but the thing is, when they tried it in la, it wasn't the success they hoped for. that's because the tablets weren't used as much as they expected. rather, it appeared there was a gap between the digital native's love of technology and their use of it in the classroom.this conflicted relationship with computers is also underscored by much of the literature on education. it is also highlighted in professional development and conferences such as  edutech.