I had this question when I took a biology class cuz I chose to study a lot on paleontology :)
It’s that there’s fossils of animals in geological strata that are older than the Cambrian explosion.
Some fossils from the ediacaran period have been discovered in layers aged to the Cambrian
The volume of the ethanol is 6.7 mL
<h3>What is the density of the ethanol?</h3>
We know that density is defined as the ratio of the mass to the volume of an object. We know that the density is said to be an intrinsic property and this means that we can use the density of the object to be able to obtain the kind of object that we are dealing with.
We have the information that the mass of the carbon dioxide that can be obtained from the reaction is about 10 g. We can now use this to obtain the number of moles by the use of the formula;
Number of moles = mass/ molar mass
= 10 g/44 g/mol
= 0.23 moles
From the reaction equation:
1 mole of ethanol produces 2 moles of carbon dioxide
x moles of ethanol produces 0.23 moles of carbon dioxide
x = 0.23 × 1 /2
= 0.115 moles
Mass of ethanol = 0.115 moles × 46 g/mol
= 5.29 g
Volume of the ethanol = mass/density
volume = 5.29 g/0.789 g/mL
= 6.7 mL
Learn more about ethanol;brainly.com/question/250024
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Answer:
The type of treatment indicated to treat infertility due to blockage of the vas deferens is surgery to remove the obstruction (option C).
Explanation:
Blockage of the vas deferens is a known cause of obstructive azoospermia, which prevents the passage of sperm and causes infertility. This type of obstruction can be corrected by surgery, part of the treatment of infertility from this cause.
The vas deferens are in charge of conducting the sperm from the testicles to the ejaculatory ducts, which prevents these gametes from being expelled to fulfill their function in reproduction.
The other options are not correct because:
<em> A. </em><u><em>Medication to stimulate sperm production</em></u><em> does not resolve the blockage.
</em>
<em> B. </em><u><em>Hormone therapy to increase testosterone </em></u><em>could be considered for infertility treatment, but the obstructive problem continues.
</em>
<em> D. </em><u><em>Semen implantation in the testes</em></u><em> does not exist as a medical treatment.</em>
Answer:
below
Explanation:
Disaccharides is formed by the condensation reactions of two simple sugar molecules, such as glucose
The most unlikely characteristics of pioneer species is that they have long life cycles with slower growth and longer life spans.
<h3>What are pioneer species?</h3>
Pioneer species are the species to first colonize and adapt to a particular habitat.
Pioneer species are usually simple organisms with limited nutrient requirement and ate mainly photosynthetic.
They usually have short life spans.
Thus, the most unlikely characteristics of pioneer species is that they have long life cycles with slower growth and longer life spans.
Learn more about pioneer species at: brainly.com/question/1386621
