Outline a method for using apomixis to maintain feminized CannabisAssume apomixis is controlled by a single dominant gene. You can choose the type of apomixis: obligate or facultative, gametophytic or sporophytic. Discuss advantages and disadvantages of your proposed method.

Why are fungal insecticides an attractive alternative to chemical pesticides for growing food crops? Human consumption of fungal insecticides would not make a person sick, but ingestion of chemical pesticides can be harmful to humans A single fungal insecticide would kill a wider variety of insects than a chemical pesticide Fungal insecticides can eliminate both harmful insects and plant pathogens, while chemical pesticides only kill insects Fungal insecticides will decompose dying plants, enhancing the nitrogen content of the soil, while chemical pesticides are not decomposers.

Bruce Ames and his colleagues have pointed out that although detailed toxicological analysis has been conducted on synthetic chemicals, almost no information is available about the mutagenic or carcinogenic effects of the toxins produced by plants as a natural defense against fungi, insects, and animal predators. Tens of thousands of such compounds have been discovered, and he estimates that in the United States adults eat about 1.5 g of these compounds each daylevels that are approximately 10,000 times higher than those of the synthetic pesticides present in the diet. For example, cabbage contains 49 natural pesticides and metabolites, and only a few of these have been tested for their carcinogenic and mutagenic effects. a. With the introduction of new foods into the U.S. diet over the last 200 years (mangoes, kiwi fruit, tomatoes, and so forth), has there been enough time for humans to develop resistance to the mutagenic effects of the toxins present in those foods? b. The natural pesticides present in plants constitute more than 99% of the toxins we eat. Should diet planning, especially for vegetarians, take into account the doses of toxins present in the diet?

Consider an ecosystem where all the fungi not involved in mycorrhizae are eliminated. How would this affect nitrogen intakeby plants? Nitrogen intake would increase Nitrogen intakewould not change Nitrogen intakewould decrease Nitrogen intakewould stop.

As noted in Section 46.7, mycorrhizal fungi help prevent carbon in the soil from escaping into the atmosphere. These fungi also benefit a host plant by providing it with a share of the phosphorus and nitrogen that their hyphae take up from soil. Most crop plants are capable of forming a relationship with mycorrhizal fungi, if any are present in the soil. Some people have suggested that inoculating soil with fungal spores could help reduce the use of industrially produced fertilizer. What are some potential advantages of using fungi, rather than chemical fertilizers, to enhance plant growth?

Which of the following are parts of the sporophyte generation in ferns: frond, sperm cells, egg cell, roots, sorus, sporangium, spores, prothallus, rhizome, antheridium, archegonium, and zygote?

The proteobacteria in the genus Pseudomonas are important spoilers of food. The rate at which food spoils is dependent on temperature. The data in the Figure show the relationship between the square root of the growth rate (how fast the population is growing per day; unitless) and the temperature of the culture. Does typical refrigeration (temperature lowered to 4C) appear sufficient to limit growth rate compared to room temperature (20C)?

Through mycorrhization, a plant obtains important nutrients such as ___________. phosphorus,zinc,and copper phosphorus,zinc,and calcium nickel calcium, and zinc all of the above

In plant life cycles, (a) the first products of meiosis are gametes (b) spores are part of the diploid sporophyte generation (c) the embryo gives rise to a zygote (d) the first stage in the diploid sporophyte generation is the zygote (e) the first stage in the haploid gametophyte generation is the prothallus

The term mycosis means any abnormal condition or disease caused by a fungus. ___________ ___________ __________ _________