What is different from the seeds of gymnosperms vs. the seeds of flowering plants? a. The seeds of gymnosperms have a thick covering
b. The seeds of gymnosperms are round
c. The seeds of gymnosperms have no covering
d. The seeds of gymnosperms are always found inside fruit
e. None of the Above

the answer is a) a shiprock was formed by igneous process

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.