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timofeeve [1]
3 years ago
6

The large number of individual languages documented in africa has resulted primarily from

Biology
1 answer:
tigry1 [53]3 years ago
5 0
<span>Thousands of years of isolation between tribal groups</span>
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In contrast to growing microtubules, shrinking microtubules ............. Group of answer choices have strong lateral interactio
Otrada [13]

Answer:

have curved protofilaments at their plus ends

Explanation:

Microtubules are polymers of tubulin proteins that function as the cytoskeleton of eukaryotic cells. Microtubules are dynamic structures that can grow and shrink at a rapid rate. During this process, tubulin subunits can associate and dissociate at the plus end of the protofilament. Tubulin subunits bind to two GTP molecules, one of which is hydrolyzed to GDP after assembly. When microtubules are unstable, protofilaments curl outwards because GDP-bound tubulin has a weak affinity (thereby curving it) and disassemble. The dynamic stability of microtubules is regulated by a feedback loop: when microtubules shrink, free tubulin concentration increases and microtubules start to grow. As microtubules grow, free tubulin concentration decreases and the rate of GTP-tubulin addition also decreases.

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2 years ago
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1 year ago
A nurse informs a woman that there is nothing more that can be done medically for her premature infant who is expected to die. t
allsm [11]
The answer to this question would be: Inhibited grief.

Inhibited grief happens when someone <span>does not display any sign of mourning. This kind of grief can cause a health problem like a stomach ache or a headache. It is important to resolve the grief when losing someone important so that grief doesn't come back as an unexplained medical problem.</span>
8 0
3 years ago
Compare and contrast the effects of inavasive species, speciation and extinction biodiversity
andreyandreev [35.5K]

Answer:

Modern invasive species are characterized by broad environmental tolerances, which contribute to their ability to survive during both the transport and establishment phases of invasion. Studies of modern and invasive species have demonstrated that invader species regularly displace native species through higher resource efficiency or competitive ability. A striking feature of the biogeographic pattern is the differential survival of species with large geographic ranges. Species with larger geographic ranges tend, on average, to have broader ecological tolerances than those with small ranges.

Explanation:

5 0
3 years ago
A piece of granite is determined to contain 50 grams of U-238. After on half-life, how much material
zvonat [6]

Answer: Hydrogen-3 or tritium as it is commonly called, has a half life of 12.32 years. If you start with 20 grams of it, how much will remain after 25 years? Ending Amount = Beginning Amount / 2 (time / half-life) Ending Amount = 20 / 2 (25 / 12.32) Ending Amount = 20 / 2 (2.0292) Ending Amount = 20 / 4.0818. Ending Amount = 4.8997 grams

Explanation:

5 0
3 years ago
Read 2 more answers
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