Identify the eight structures of the male reproductive system and indicate their functions.
What will be an ideal response?
1. testes: produce sperm and sex hormones
2. epididymides: ducts where sperm mature and some are stored
3. vasa deferentia: conduct and store sperm
4. seminal vesicles: contribute nutrients and fluid to semen
5. prostate gland: contributes fluid to semen
6. urethra: conducts sperm
7. bulbourethral glands: contribute mucus-containing fluid to semen
8. penis: organ of sexual intercourse
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One of the reasons study of nitrogen use in plants is of special interest is because:
A. Nitrogen is limited in our atmosphere. B. Nitrogen in its atmospheric form is not useable by plants. C. Nitrogen is often toxic to plants. D. None of the forms of nitrogen are easily absorbed by plants. E. Nitrogen is not an essential element for plant growth.
Donor cells in conjugation are labeled ____, whereas recipient cells are labeled ____
a. F+ cells; F- cells b. F+ cells; F+ cells c. F- cells; F+ cells d. F1 cells; F2 cells e. F+ cells; F2 cells
Polyandry is the mating system in which ____
a. one male and one female form a long-term association b. both males and females mate with multiple partners c. one male mates with many females d. one female mates with many males e. both males and females provide care to offspring
Which of the following is not a type of simple tissue?
1.collenchyma 2.parenchyma 3.periderm 4.sclerenchyma