Early vascular plants grew only by cell division at the tips of the stems and shoots, a type of growth called
A. secondary growth.
B. primary growth.
C. vascular growth.
D. wood.
Answer: B
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Of what substance are intervertebral disks
made?
a. smooth muscle b. cartilage c. ligaments d. loose connective tissue e. epithelial tissue
Matching. Choose the one most appropriate answer
for each. 1. ___ aggregate fruit 2. ___ anther 3. ___ carpel 4. ___ embryo sac 5. ___ endosperm mother cell 6. ___ megaspores 7. ___ micropyle 8. ___ microspores 9. ___ multiple fruit 10. ___ ovary 11. ___ ovule 12. ___ petal 13. ___ pollen grain 14. ___ sepal 15. ___ stigma A. male spores of anthers B. site where pollen tube usually penetrates the ovule C. develops into a fruit at maturity D. a 2n cell that will help form nutrients for the developing plant embryo E. cluster of matured ovaries attached to a common receptacle F. modified leaf with pigments and fragrance-producing cells G. immature male gametophyte H. female reproductive organ I. landing platform for pollen J. pollen-bearing structure K. female spores of ovule L. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented M. female gametophyte N. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) O. forms a seed at maturity
In freshwater sponges and other simple freshwater
animals, water flows into the body by __________. Fill in the blank(s) with the appropriate word(s).
Which of these carry(ies) oxygen-poor blood?
A) pulmonary arteries B) pulmonary veins C) aorta D) left ventricle