This is strong evidence for the hypothesis that the chroloplast originated ais a symbiotic cyanobacteriam that became permanentely incorporated into its host.the complete genome sequence of cyanobacteria and of the higher plant arabidopsis thaliana leave no doubt tha chroloplast originated through endosymbiosis from a cyanobacteriam
Answer:
ok I'm <em>pretty </em>sure that for #1 it's either a or d, its deffinetly not b or c
and for #2 its b, but i'm not entirely sure, its been a while since I've done biology
Explanation:
Explanation:
1. both stems contain photosynthetic chlorenchyma cells.
2. their xylem and phloem are arranged into vascular bundles. These vascular bundles are collateral, surrounded by parenchyma.
3. Their xylem comprises both protoxylem and metaxylem.
4. both stems contain a single-layered epidermis.
Answer:
- Flow through the renal tubule increases when glomerular filtration rate <u>increases</u>.
- When filtrate flow through the renal tubule increases, reabsorption of sodium chloride by the tubule <u>decreases</u>.
Explanation:
Renal tubules are structures that form part of the nephron -a functional unit of the kidney - whose function is the reabsorption of glomerular filtrate and the secretion of waste products, in addition to regulating the balance of water and body electrolytes.
The renal tubules are divided into:
- <em>Proximal contoured tubule, where most of the reabsorption occurs.</em>
- <em>Henle's handle, which is involved in electrolyte balance.
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- <em>Distal contoured tubule, responsible for the secretion of substances to be eliminated.
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The renal tubules are capable of reabsorbing 99% of the glomerular filtrate. The rate of glomerular filtrate is about 120 milliliters per minute, and the tubular flow depends on it, so if the glomerular filtrate increases, the amount of filtered fluid increases as well as the amount that flows through the renal tubule.
The water excreted by the kidney contains electrolytes -such as sodium, potassium, and chlorine- which it carries to the kidney's tubules. In order to achieve equilibrium, the tubules are responsible for reabsorbing and secreting electrolytes to maintain homeostasis.
However, certain conditions cause the tubular flow to increase, which prevents the adequate reabsorption of some electrolytes, such as sodium and potassium, decreasing their reabsorption and increasing their excretion, as happens with the use of diuretic drugs.
