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- The section Evolution of Seeds describes the fossil seeds Archaeosperma arnoldii. Its megasporangium was surrounded by a layer of tissue, called an that projected upward, and there was a large , a hole that permitted sperm cells to swim to the egg. If you have studied flowering plant reproduction, how many of these same features occur in flowering plants?Which of the following structures or systems is not unique to plant evolution?a. chloroplastsb. vascular tissuec. seedsd. flowers and fruitsWhich of the following observations would provide the strongest evidence that two plants belong to different biological species? * here are variations in their RNA sequences. The leaves and flowers show morphological differences. They produce viable but sterile offspring. They occupy unique habitats in an ecosystem.
- Which of the following statements regarding plants is not correct? * Diploid plants produce haploid spores by mitosis. Gametophytes are haploid. Flower is the reproductive organ in plants. All plants have a life cycle with alternation of generations.Double fertilization in flowering plants occurs by two sperms that fertilize: * 1p O polar nuclei and egg cell. egg cell and synergid cell none is correct two egg cells. egg cell and endosperm. rotic cells it consists ofAll of the following are trends in plant evolution except; A trend towards better water conducting tissue A trend towards Sporophyte dominance and away from gametophyte dominance A trend towards seeds and away from free spores A trend away from heterospory and towards homospory
- The picture below shows a branch of Douglas fir, an evergreen tree of the Phylum Coniferophyta. Based on this picture, which of the following answers is true? O only staminate cones are visible O only ovulate cones are visible O both ovulate and staminate cones are visible O neither ovulate and staminate cones are visibleFlowers whose throats (nectaries) are too long for hummingbirds to reach their nectar are unlikely to be pollinated (nectar reward isn't available) and therefore the flower is unlikely to reproduce. But if the nectaries are too short, hummingbirds can get their nectar without pollinating them because they don't reach in far enough to touch the pollen-carrying anthers, thus no reproduction for the flower. Flowers evolve with an intermediate length of nectaries. This is an example of what sort of selection? Group of answer choices Disruptive Stabilizing Directional SexualThe picture below shows a branch of Douglas fir, an evergreen tree of the Phylum Coniferophyta. Based on this picture, which of the following answers is true? o only staminate cones are visible only ovulate cones are visible both ovulate and staminate cones are visible o neither ovulate and staminate cones are visible MacBo-
- Can you define the following plant terms; - Apical dominance - SymplastSome ancestral plants had a difficult transition to land, as challenges to survive caused plant evolution to develop very specialized adaptations over an extended amount of time. These are some of the challenges that plants faced: A. Avoiding desiccation B. Supporting larger bodies (against gravity) C Internally transporting substances D. Keeping gametes wet E. Keeping embryos wet For each of the above challenges. provide a structure/adaptation that plants have developed which mitigates that specific challenge. Must describe a structure or trait for all!What is pollination? Why is pollination important? How this process influences flowering plant evolution?