Mycorrhizae enhance plant nutrition mainly bya. absorbing water and minerals through the fungal hyphae.b. providing sugar to root cells, which have no chloroplasts.c. converting atmospheric nitrogen to ammonia.d. enabling the roots to parasitize neighboring plants.

The most abundant gas in our atmosphere cannot be used by plants directly in its atmospheric form. Fortunately, this gas is made available to some plants by certain bacteria that live symbiotically in their roots. What is this gas?

Mycorrhizae develop __________.

Which of the following is true of mycorrhizae?

By trapping insects, carnivorous plants obtain __________, which they need __________.

Which of the following activities of soil bacteria does not contribute to creating usable nitrogen supplies for plant use?a. the fixation of atmospheric nitrogenb. the conversion of ammonium ions to nitrate ionsc. the decomposition of dead animalsd. the assembly of amino acids into proteins

Epiphytes area. fungi that attack plants.b. fungi that form mutualistic associations with roots.c. nonphotosynthetic parasitic plants.d. plants that grow on other plants.

By trapping insects, carnivorous plants obtain ___________, which they need ___________ . (Choose the best answer.)a. water ... because they live in dry soilb. nitrogen ... to make sugarc. phosphorus ... to make proteind. nitrogen ... to make protein

The greatest difference in health between two groups of plants of the same species, one group with mycorrhizae and one group without mycorrhizae, would be in an environmenta. where nitrogen-fixing bacteria are abundant.b. that has soil with poor drainage.c. that has hot summers and cold winters.d. in which the soil is relatively deficient in mineral nutrients.