In most developing eudicot seeds, the primary source of nutritive material is in the:a
fruit.
b. zygote.
c. embryo.
d. endosperm.
e. cotyledons
d
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You and your biology lab class take a field trip to a marine aquarium. Your guide is a marine biologist who studies squids. She explains to your class how squids are able to blend into their environment. She points out that squids have pouches of pigments embedded in their epithelium. The pouches are called
A. trochophores. B. spermatophores. C. lophophores. D. chromatophores. E. phytophores.
What happens when living R strain Streptococcus pneumoniae bacteria are mixed with heat-killed S strain
Streptococcus pneumoniae bacteria?
a. The S strain bacteria come back to life. b. The R strain bacteria are killed, and the S strain bacteria remain dead. c. The R strain bacteria are transformed into S strain bacteria. d. The S strain bacteria are transformed into R strain bacteria. e. The R strain bacteria are killed, and the S strain bacteria come back to life.
An area where two bones meet is called a
A. synapse. B. joint. C. synaptic cleft. D. vascular cavity. E. olfactory bulb.
Why is fertilization in flowering plants called double fertilization?
a. it takes two pollen grains to fertilize a single ovule b. two ovules must be fertilized to form a single seed c. two cells in the ovule are fertilized, the egg and the endosperm mother cell d. one pollen grain fertilizes two ovules e. it takes the efforts of two flowers (male and female) to produce seeds