You are watching: Why have biologists hypothesized that the first land plants had a low, sprawling growth habit?
Which of the complying with were probably determinants that permitted at an early stage plants to efficiently colonize land?1. the loved one variety of potential predators (herbivores)2. the relative variety of competitors3. the relative availcapability of symbiotic partners4. air"s loved one lack of support, compared to water"s support
photo with life cycle 7- mature gametophyte11-embryo4-meiosis3-megspore6- mitosis10-endosperm formation
liverworts, hornworts, and also mosses are grouped together as the Bryophytes. Besides not having actually vascular tproblem, what perform they all have actually in common?
Many moss gametophytes carry out not have a cuticle and also are 1-2 cells thick. What does this imply around moss gametophytes and also their structure?
Throughout the Carboniferous period, forests consisting mainly of _____ created large quantities of organic issue, which was hidden and later became coal.
A botanist discovers a brand-new species of plant in a tropical rain woodland. After observing its anatomy and life cycle, he notes the following characteristics: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte generations via the sporophyte leading, and no seeds. This plant is probably many closely pertained to _____.
If human beings had been existing to build log frameworks in the time of the Carboniferous period (they were not), which plant types would have been suitable resources of logs?
Arvariety the complying with terms from most inclusive to least inclusive.1. embryophytes2. green plants3. seedless vascular plants4. ferns5. tracheophytes
Besides oil, what various other chemical should be detected in substantial quantities upon chemical analysis of these little spheres?
What attribute of both true mosses and ferns makes it the majority of surprising that they deserve to make it through for many type of generations in dry deserts?
Upon closer inspection of the leaves of "freduced of stone," one deserve to observe tiny, cone-prefer frameworks. Each cone-prefer framework emits spores of 2 different sizes. More investigation also reveals that the roots of "freduced of stone" branch just at the thriving reminder of the root, developing a Y-shaped framework. Consequently, "freduced of stone" must be expected to possess which various other characteristics?1. a gametophyte generation that is dominant2. lignified vascular tissues3. microphylls4. filamentous rhizoids, yet not true roots5. spores that are diploid once mature
In which combicountry of places would certainly one who is looking for the gametophytes of "freduced of stone" have actually the ideal possibility of finding them?1. moist soil2. underground, nourimelted tbelow by symbiotic fungi3. south- or west-encountering slopes4. permanently shady places5. far from any type of flower of stone sporophytesUse the adhering to indevelopment to answer the question(s) below.
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Increasing the number of stomata per unit surchallenge area of a leaf as soon as atmospheric carbon dioxide levels decrease is a lot of analogous to a humale _____.