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DENIUS [597]
3 years ago
5

Where did the following drugs originate from?

Biology
1 answer:
mihalych1998 [28]3 years ago
5 0
Aspirin comes from the bark of the Willow tree. Ancient Egyptians used the tree bark first.
Penicillin is mold Penicillium chrysogenum<span>) and was found on fruit in 1928. 
 </span>

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How do large molecules move across the plasma membrane
Elodia [21]

Answer:

The plasma membrane is selectively permeable

Explanation:

hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.

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3 years ago
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Mendel did experiments in which he kept track of the inheritance of seed texture (wrinkled or smooth). First he created true-bre
sveticcg [70]

Answer:

smooth was dominant over that for wrinkled

Explanation:

In complete dominance, a gene may have two different variants or 'alleles', dominant and recessive. A dominant allele is a gene variant that is able to produce a certain phenotype, even in the presence of other alleles, while a recessive allele is a gene variant that is masked by the dominant allele in heterozygous individuals (i.e., individuals that inherited different alleles from each parent). By crossing smooth and wrinkled pea plants, Mendel observed the offspring (F1) were smooth rather than mixed, indicating one type of seed texture was dominant over the other. Subsequently, Mendel observed that alleles for different traits (e.g., seed texture and seed color) assorted independently during meiosis.

8 0
3 years ago
The following chain represents how energy flows through ecosystems:
GrogVix [38]
Many plants and animals would die off <span>if a nearby volcano erupted and filled the sky with dust particles, which caused significantly less sunlight to reach the ecosystem over the course of a year.</span>
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3 years ago
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A cartilaginous structure between the "throat" and the trachea.
enyata [817]

Answer:

The correct answer is A. The cartilaginous structure between the "throat" and the trachea is the larynx.

Explanation:

The larynx is a tubular organ. The larynx wall is composed of 9 pieces of cartilage. Three are odd (thyroid cartilage, epiglottis and cricoid cartilage), and three pairs (arytenoid, cuneiform and corniculate cartilage). In addition, it communicates the pharynx with the trachea and is in front of it.

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3 years ago
If you were looking through a microscope, how would you be able to tell if you were looking at a eukaryotic cell? Explain and/or
miss Akunina [59]
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