18

The big difference is that in humans, there is no mitosis in the haploid phase. There are three terms that are important here: Haplontic: Most of the life is spent in the haploid phase Diplontic: Most of the life is spent in the diploid phase Haplodiplontic (aka. diplohaplontic): About as much time is spent in the haploid phase than in the diploid phase ...


6

Actually, water is used in the light-dependent portion of photosynthesis, not the Calvin cycle. The added water efficiency doesn't actually relate to water's involvement in chemical processes of photosynthesis at all. Water is instead lost incidentally through stomata when they're opened to allow CO2 into the leaves (see here for explanation). This CO2 IS ...


5

The definition in your first paragraph doesn't match your understanding in the second. If osmotic pressure is high in "A" relative to "B", you would have to apply a physical pressure to "A" to prevent solvent moving from B to A. If there is no such pressure applied, then solvent does move from B to A. The osmotic pressure and physical pressure are separate ...


4

Your garlic was likely purchased as a bulb, not seed, and stored in the fridge. The garlic 'clove' is not frozen, so your fridge readily mimics underground conditions in the temperate late winter or spring season. The bulb is generally buried underground, and the subsequent initiation of plant development and growth uses the stored energy. In a garden, the ...


4

It is the sap; you can see the composition of the sap (of Indian mangoes) in this article. Some plants also produce latex from injury sites. The mango sap is not supposed to be eaten as it can irritate the skin; a condition referred to as Mango Dermatitis.


4

It is a transitory state. During coconut development the "milk" actually starts as a spongy solid a multinucleate endosperm. As the coconut develops it absorbs this tissue. Because of a coconuts hard structure this leaves a cavity since the coconut cannot change shape as the tissue density changes, some fluids including oils are left behind as hte tissue ...


3

The availibity of -OH groups for hydrogen bonding with polar water molecules is reduced in amylose due to its coiled nature (resulting in part by H-bonds between the glucose monomers). Amylopectin is even less soluble due to the additional 1-6 glycosidic bonds on the branch chains, further reducing its H bonding potential and therefore reducing solubility ...


2

The second paragraph in the question describes two solutions separated by a semipermeable membrane (a membrane that allows water through, but not anything dissolved in the water). As it says, in those conditions, water will move from the section with low osmotic pressure to the solution with high osmotic pressure. Osmotic pressure, like other colligative ...


2

As you guessed, tryptamine alkaloid biosynthesis is generally associated with herbivore deterrence in plants (see e.g. paper 1, paper 2, paper 3), as these compounds can be toxic to animals. I wasn't able to find a reference specifically related to DMT, as it is only one of a family of tryptamine derivatives. For example, the papers just linked to shows that ...


2

It looks to be a Clivia; The English common names are Natal lily or bush lily. It's a plant that comes originally from Africa but it now commonly sold as house plants. The Wikipedia article give a good information about that plant. Example: Picture taken from this site. You have also to notice this is a toxic plant and to keep away from small children ...


1

I don't know much about trees, but I was very skeptical about this post at first. If this web page is correct, then the post is actually not so far-fetched. Trees are amazing. According to the page, the average tree absorbs 10,000 gallons of water and uses 1000 gallons, evaporating the rest. 24 gallons of water contains one pound of dry matter. That means ...


1

Results from the peppermint plants study show that all the peppermint plants contain minor amounts of nicotine before treatment, but the experiments revealed that the plants also incorporate nicotine considerably from the soil as well as from tobacco smoke. These findings demonstrate for the first time that the reported occurrence of nicotine indeed may ...


1

According to recent studies, drought stress does not consistently lead to increases in the pH of xylem sap. One article which discusses interspecies differences is Vit Gloser, et al., "The dynamics of xylem sap pH under drought: a universal response in herbs?," Plant and Soil 409, nos. 1-2 (2016): 259-272. As to what may have prompted the textbook authors ...


1

Depending on molecular weight of amylose and because of its helical structure formed by two macromolecules makes it partly soluble in water. Heating amylose solution leads to formation of colloidal suspension of soluble fraction and remining insoluble higher molecular weight fraction of amylose does not dissolve. On cooling this suspension, certain portion ...


1

This is an example of "bouquet ears", or, what Rob Nielsen coined in his 1999 paper2 as "MESS Syndrome" (Multiple Ears on Same Shank). Although not a regular occurrence, MESS syndrome is not unusual. According to Nielson in an online article in 2014 [my emphasis included]: The fact that multiple ears sometimes develop from a single ear shank is not, in ...


Only top voted, non community-wiki answers of a minimum length are eligible