Question

1. After plant gametes fuse, they undergo mitosis to produce the

sporophyte. spores. flower or gametophyte?

2.

Which of the following statements correctly describes the immune response when the invading organism is a virus? Lymphocytes are not involved in the immune response. The antigen molecules on the viral DNA enable the immune system to prevent the infection. The lack of nucleic acid in a virus complicates the immune response . itself . Lymphocytes respond to infected human cells rather than to the virus itself.

3. White blood cells that engulf and destroy pathogens in nonspecific manner are called ____.

4. A plant whose seeds are dispersed by animals most likely produces___ seeds.

Large. sugary.

Small, soft.

Large, dense

Small, light.

Answer 1

1) Plant gametes, fuse to for a zygote that divides mitotically to form a diploid sporophyte. The sporophyte then forms spores which fuse to become a gametophyte that produces gametes which fuse again to form sporophytes.

2) Lymphocytes respond to viral infected human cells rather than the virus itself.

3)White blood cells that engulf and destroy pathogens non-specifically are called phagocytes. Macrophages are an exaple of phagocytes.

4) The plants whose seeds are dispersed by animals are more likely to have large ,sugary seeds that usually attract the animals to consume them, the seeds are however excreted intact into the environment. Small, soft and light seeds are generally produced by plants where seeds are dispersed by wind.