Organisms in this class are made of spongin, sometimes with silicon dioxide spicules and have the leuconoid body plant. 

Modern birds that can fly, swim, and posses a keel sternum belong to class_______

Rotifers feature all the following features except

The repeating unit from which the shoots of flowering plants are constructed is called a(n)

Concepts Used: while, prompt(), alert(), input validation Prompt:Ask the user to enter a number between 1 and 5. If the user enters something else, show an error and ask again. Repeat until a valid number is entered. Then display “Thanks for entering a valid number!”

Concepts Used: for, prompt(), alert(), string concatenation Prompt:Ask the user for a number. Then use a for loop to count from 1 up to that number and alert each value as: “Counting: 1”, “Counting: 2” etc.

Identify the structure indicated by the blue arrow. Be specific.     _______

Identify the tissue. Be specific.  _______

Identify the tissue.   _______

Identify the tissue. Be specific. _______