Unit 4 Topics
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
photosynthesis takes place (inside/outside) chloroplasts
inside
bacteria + endosymbiosis = ____________
chloroplasts
an organism (host cell) engulfs a free-living bacterium, creating a new organelle within the host cell
endosymbiosis
in this case, a photosynthetic bacterium is engulfed by an early eukaryotic cell, creating a ______________ _________
photosynthetic eukaryote
endosymbiosis is ___________ - the bacteria gets a safe place to live, the eukaryote gets sugar(s)
mutualistic
symbionts reproduce separately AND have their own DNA
endosymbiotic theory
origin of organelles:
• start with 2 independent bacteria • 1 bacterium engulfs the other • 1 bacterium now lives inside the other • both bacteria benefit from the arrangement • the internal bacteria are passed on from generation to generation
organisms of different species that live in a relationship with each other
symbionts
eukaryotic cell engulfs and absorbs a prokaryotic cell
primary endosymbiosis
eukaryotic cell engulfs and absorbs another eukaryotic cell (the cell created in primary endosymbiosis then goes on to absorb other cells like itself)
secondary endosymbiosis
base of the “food chain” and ecosystems
green algae
photosynthesizing algae in the ocean produce (#)% of the oxygen in Earth’s atmosphere
70
green algae is a massive ___ producer. some algae contain 1,000x as much ___ as corn
oil
these 2 factors contribute to plant cells’ lack of movement, but they help the cell survive when exposed to too much water or too little of water
plant water vacuoles and cell wall
plants are important for:
• food • O2 • ecosystems • humans and society • furniture/clothing • medicine
plants hold ____ in place and they add nitrogen into the soil (helps the nutrient cycle)
soil
plants can be used to make _____ (–> books)
paper
plants can aid in ________ _______
chemical defense
______ (bryophytes) are the most original LAND plants (there are fossils of ______ from ~500 million years ago)
mosses
mosses (have/don’t have) a vascular system or roots
don’t - they cannot grow tall
mosses contain ________ _____, which means mosses need water to reproduce
swimming sperm
female structure of mosses (include the egg)
archegonia
male structure of mosses (include the swimming sperm)
antheridia
_____ (pterophytes) are from ~400 million years ago
ferns