Slide 1Out-crossingPhloem & XylemProtostome vs. DeuterostomeJeopardy!!!!!!!BIOLOGY REVIEW!!!!!By: Oh WhaleOut-crossing The genetic transmission of a defined heritable characteristic from one group of individuals (population, crop variety) to another.This is the most common result of cross-pollination Think of the pine cone example!!!!Possible question for test would be: Why would outcrossing reduce selfing in the population?reasoning: the wind blows the male cones pollen to another top tree fertilizing the female cones. Which is why females are located on the tops of trees and the males are located on the bottom of the tree. This process of out-crossing is why this reduces selfing in the populationPhloem & Xylem Explain why removing a strip of bark and the underlying tissue from the entire circumference of a tree would kill it? Phloem: sugars ( moves up and down the tree)Xylem: water and minerals (only up)Removing the bark removes the functionalPhloem which takes away the sugar that go toThe roots. Roots cannot make sugar. They Depend on the leaves to photosynthesize and Bring nutrients to the roots (down movement)Protostome vs. Deuterostome Echinodermata and chordate are the only ones that are deuterostomes!!( might help some) Protostomes: Deuterostomes:Spiral & determinate radial & indeterminatemouth, anus anus, mouth Cells are already differentiated undertermined on what it anterior cannot become posterior can beJeopardy!!!!!!!Found this I hope it helps
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