Answer: B. prevent the internal environment from changing
Explanation: homeostasis actually helps the internal environment keep a stable, constant, condition.
Answer: C: The total mass of glucose and oxygen formed from photosynthesis is equal to the total mass of carbon dioxide and water used up during the reaction.
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.

Each gamete gets just one crest allele. Half of the gametes will get one of the parent's alleles, and the other half will get the other allele. The Punnett square shows the possible crest allele combinations in the offspring. There are 4 possible combinations in all.
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This could either be c or d, both should work
<span>The nurse should assess the baby for a brachial plexus injury such as brachial plexus paralysis because this is the number one injury caused by a shoulder dystocia vaginal birth. This type of birth produces pressure and traction on the brachial plexus. Sometimes the injury caused during this type of birth are only temporary, but other times they are permanent.</span>