What are four major characteristics of the phylum Echinoderms?

How do forest prevents the spread of deserts ? Explain why forests have disappeared in northern China . Write your answer using complete sentences.plz help ASAP A 3-pack of light bulbs costs $3.45. A 4-pack of the same light bulbs costs $4.20.Which pack has better value? Plz help with the math question I need help what should I do if I'm having a bad day?do you think I'm a cockroach if so please be honest I'm a girl 15 years old and freaking hate herself Which equation is represented by the graph below? True or False: A city-state is a city that has no government but is an independent state. Rewrite the sentences below in the most concise manner possible. Copy and paste the sentences into the box before rewriting them. I will give all my points and brainliest.The universe is made up of thousands and millions of galaxies, and each of them has innumerous numbers of stars in them.Electronic gadgets of various sorts help us work around the home and the office in a more efficient and capable manner.Shockingly, air pollution is still the one and only leading cause of lung disorders and diseases across the whole wide world.Reading is one of the most unappreciated hobbies of all time because it has the capability to keep you engaged for hours on end.Movies that are based on books are never really up to the mark because they always simply fail to depict every single detail mentioned in the book. Need help with this Who did Washington side with? Jefferson or Hamilton? The next model of a sports car will cost 14.1% less than the current model. The current model costs $55,000 . How much will the price decrease in dollars? What will be the price of the next model? Choose the formula for ammonium.,b NH3C(NH)3N HELP! i can not figure this out! y=4x+1 As you can see I NEED HELP RIGHT NOW! There are 300 dogs spread around 12 kennels across Texas. If x represents kennels and y represents the number of dogs, what is k, the constant of proportionality? A parallelogram is a rectangle if and onlyif its diagonals are congruent. that is the question Which is a disaccharide? 1. glucose 2. fructose 3. sucrose 4. cellulose THIS is SO easy PLEASE help ME ! ill ALSO mark YOU brainliest ! Find the next term of the given sequence. 1.31, 2.54, 3.77, ... 4.90 5.00 5.10 A chorus has 50 singers. There are 16 altos and 10 tenors. What percent ofthe singers are altos? What percent of the singers are tenors?PLS HELP