In science, theories tend to be ___________ than hypotheses.
A) more speculative
B) less scientific
C) more experimental
D) broader in scope
E) less reliable
D) broader in scope
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In a woody stem, the vascular cambium is located directly below the outer bark
1.True
2.False
In studies on the pipefish Nerophis ophidion, females are larger than males and appear to be under greater sexual selection pressure than males. The females have two traits that male pipefish of the species lack. What are these two traits?
A) dark blue stripes and lateral spines B) bright orange stripes and skin folds on their bellies C) dark blue stripes and skin folds on their bellies D) lateral spines and skin folds on their bellies
This group is one of the two main angiosperm clades. This group has about 200 000 species, and most have two cotyledons. What is the name of this plant group?
a. eudicots b. monocots c. magnoliids d. orchids
Which of the following causes cervical dilation and helps stimulate uterine contractions during labor?
A) Progesterone B) Oxytocin C) Prostaglandins D) Estrogen E) Acetylcholine