I can't find examples in the book as reference. Please help me with these questions and explain why.
1.) Which of the following has no vascular tissue (“plumbing system”)? A) Conifer B) Angiosperm C) Fern D) Moss E) Ginkgo
2.) Which of the following characteristics of plants is absent in their closest relatives, the charophyte algae? A) starch B) cellulose in their cell walls C) chlorophyll D) presence of an embryo
3.) Which of the following structures is produced through meiosis? A)Gametes B)Spores C)Embryos D)A and B E)A,B & C
4.) The gametophyte is the dominant generation in: A) Ferns B) Mosses C) Gymnosperms D) Angiosperms E) More than one of these answers is correct
Update, I got helped already.
1. angiosperm
2.
To answer these questions, we need to focus on the characteristics of different plant groups and understand their reproductive processes. Here's how to approach each question:
1) To determine which of the options has no vascular tissue, we need to know what vascular tissue is. Vascular tissue refers to the "plumbing system" of plants, which transports water, nutrients, and sugars. Examples of vascular tissue include xylem and phloem.
To find the answer, we need to know which of the options lack vascular tissue. You can start by recalling the characteristics of each plant group. For instance:
- Conifers and angiosperms are seed plants, typically having vascular tissue.
- Ferns are also vascular plants.
- Mosses are non-vascular plants, meaning they lack vascular tissue.
- Ginkgo is a seed plant, so it generally has vascular tissue.
From this analysis, the correct answer would be D) Moss, as it is the only option that lacks vascular tissue.
2) To determine the characteristic of plants that is absent in their closest relatives, the charophyte algae, we need to identify the features that distinguish plants from algae. Here are the options provided:
- Starch: Plants store carbohydrates, including starch, as an energy reserve.
- Cellulose in cell walls: Both plants and algae have cellulose in their cell walls.
- Chlorophyll: Both plants and algae possess chlorophyll for photosynthesis.
- Presence of an embryo: This is a defining feature of plants. The embryo develops from a fertilized egg and is protected by maternal tissues.
From these options, the only characteristic that is absent in charophyte algae, which are closest relatives of plants, is the presence of an embryo (D). Therefore, D is the correct answer.
3) To determine which structure is produced through meiosis, we need to understand the process of meiosis and the structures it generates. Here are the options:
- Gametes: Gametes are produced through the process of meiosis, and they are the reproductive cells involved in sexual reproduction.
- Spores: Spores are also produced through meiosis and are involved in asexual or sexual reproduction, depending on the organism.
- Embryos: Embryos are not directly produced through meiosis but rather result from the fertilization of gametes.
From these options, both gametes and spores are produced through meiosis (A and B). Thus, the correct answer is D) A and B.
4) To identify the dominant generation in different plant groups, we need to understand the lifecycle of plants. In plants, there are two alternating generations: the sporophyte and the gametophyte. The sporophyte generation produces spores that develop into gametophytes, which, in turn, produce gametes for sexual reproduction.
Considering the options:
- Ferns have a dominant sporophyte generation.
- Mosses have a dominant gametophyte generation.
- Gymnosperms, which include conifers, have a dominant sporophyte generation.
- Angiosperms, which are flowering plants, also have a dominant sporophyte generation.
From these options, both mosses and ferns have a dominant generation different from the others mentioned. So, the correct answer is E) More than one of these answers is correct.
By understanding the characteristics and life cycles of different plant groups, you can determine the correct answers to these questions. Remember, studying the book and familiarizing yourself with the specific details will provide you with a better understanding of the subject matter.