__________ is the science of making hypotheses about evolutionary relationships among clades. Fill in the blank(s) with the appropriate word(s)
ANSWER: Cladistics
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When pollen from one species lands on the stigma of a flower from another species
a. the pollen tube typically does not develop. b. the pollen tube typically forms, but the sperm cannot penetrate the egg. c. the pollen tube typically forms and grows to the ovary, but then stops. d. the pollen tube typically forms, but the sperm are killed. e. the pollen tube typically forms and the egg is usually fertilized, but the embryo rarely grows.
All of the following characteristics describe a developing country except
A. high infant mortality. B. low per capita income. C. short life expectancy. D. low fertility rate. E. rapid doubling time.
Which list correctly describes the sequence of events that occurs during cell division, beginning at interphase?
a. nuclear division, DNA replication, cytoplasmic division b. DNA replication, cytoplasmic division, nuclear division c. cytoplasmic division, nuclear division, DNA replication d. nuclear division, cytoplasmic division, DNA replication e. DNA replication, nuclear division, cytoplasmic division
Contractions of the dome-shaped __________ and the intercostal muscles between the ribs alter the volume of the
thoracic cavity during breathing. Fill in the blank(s) with the appropriate word(s).