Answer:
Open circulatory system:
Relies on the heart to keep blood flowing
Used in all vertebrates
Sorry thats all i know :)
Answer:
A.) dandelions with seeds dispersed by the wind
Explanation:
Greenhouse gasses absorb heat radiating from the earths surface
The correct answer is a trisomy. Hope this helps.
Answer:
The correct option is DECREASED LEVELS OF CARBON DIOXIDE.
Explanation:
The major factors affecting photosynthesis rate are light intensity, carbon dioxide concentration and temperature. Increase or decrease in any of these three factors will directly affect the rate at which photosynthesis takes place. Increase concentration of carbon dioxide will generally increase photosynthesis while a decrease in its concentration will reduce the rate at which photosynthesis takes place.