Question

ws. Unless you need to edit it's safer to stay in Protected View Enable Editing Alternation of generations describes plant life cycles. There are ſhow many?) generations. • The gametophyte generation begins when the process of forms (ploidy) cells. The gametophyte generation ends when a (ploidy) _ is formed by the process of_ Figure 38.4 Alternation of generations: What are the two generations in the plant life cycle? What is the male gametophyte? Female? The microsporangium in the pollen sac. What is the megasporangium? How many megaspores are produced through meiosis? How many survive? A pollen grain holds within it 2 cells. What are these two cells? What does each become? Angiosperms are fertilized through a process called double fertilization. During this process, one sperm cell enters the ovule through a small pore or opening called the __. This opening creates a channel through the outer protective _ that surround the megasporangium. Later, after pollination, these integuments become the seed During double fertilization, one sperm cell fertilizes the egg which is surrounded by two synergids that aid in directing that sperm to the egg. A second sperm cell fertilizes the - and a triploid (3n) is produced. What are the 4 layers of modified leaves found in the sporophyte stage? What are their functions? Which 2 are reproductive? Be able to identify the parts of a flower. • What is a pimary driver of natural selection in plants? • Define pollination. Why is it important (what is its role in plants)? What are the three general ways by which pollen can be transported? What is the difference between the plant-pollinator relationship for plants pollinated by bees, moths, butterflies, birds, blowflies, and bats? Which pollinators get a reward from the plant? Which ones get tricked? • Which, pollination by wind or pollination by animals, requires the production of LOTS of pollen? Why? Which wind or animal pollination requires less energy and less pollen production? Why? What are the trade-offs for both plants and pollinators that are in a generalist relationship? What about a specialist relationship? What is double fertilization? After fertilization, an ovule becomes a _and an ovary becomes a that has two functions: - and What two seed structures can support the seed by harboring nutrients? For a single plant species, how can you tell whether the seed gets it nutrition primarily from the endosperm or cotyledon? True or false - the fleshy part of

Answer 1

As per our regulation, the first four questions are solved in MCQ. I have also solve an extra for your benefit,

1, Alternative generation has TWO phases gametophytic and sporophytic.

2, Gametophytic generation begins when a process of MEIOSIS forms HAPLOID (n)cells.

3, Gametophyte generation ends when two spores fuse to form a DIPLOID is formed by a process of FERTILISATION.

4, Two generations in plant life cycle - gametophyte and sporophyte. Male gametophyte is the POLLEN GRAIN and female is EMBRYO SAC.

5, megasporangium is the female organ that produced megaspores. 4 megaspores are produced after meiosis, only one survives to produce female gametophyte.