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marissa [1.9K]
3 years ago
14

How common are magnetic reversals?

Biology
2 answers:
Art [367]3 years ago
8 0
I agree w next person. that person spoke right.
NISA [10]3 years ago
4 0
Its common. In the last 10 million years, there have been 4 or 5 reversals per million years
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The main site of secretion of all substances, except for one, is the proximal convoluted tubule. What is the one substance that
kogti [31]

Calcium is one substance that is secreted elsewhere but not in the proximal convoluted tubule.

<h3>Renal reabsorption and secretion</h3>

Renal reabsorption is defined as the movement of water and specific solutes from the renal tubule back into the plasma.

Renal secretion is defined as the process by which waste ions and hydrogen ions pass from the renal capillaries into the renal tubule to be excreted into the urine.

At the proximal convoluted tubule, calcium is reabsorbed but not secreted. Therefore, Calcium is one substance that is secreted elsewhere but not in the proximal convoluted tubule.

Learn more about renal tubule here:

brainly.com/question/26062461

4 0
3 years ago
Which one of these characterizes a hydrophilic substance---a substance that is easily mixed with water?
Gre4nikov [31]
The term "hydrophillic" literally means water loving.

Hydrophillic substances are those that have an affinity of water, meaning they are easily dissolved and absorbed in water. Polar substances, those which have charges on the atoms of their molecules, tend to be hydrophillic due to the fact that water itself is a polar substance.
4 0
3 years ago
Describe Seymour Brenner's contribution to cracking the genetic code with respect to translation.
11Alexandr11 [23.1K]

Seymour Benzer used phage T4 mutants, Experimental evidence that a gene is a linear sequence of nucleotide pairs. Some regions of chromosomes have "hot spots" for mutations. Benzer's experimental approach to fine structure mapping of the rII locus.  Generated 1612 spontaneous point mutations and several deletions in rII locus identified two complementation groups, rIIA and rIIB.  Mapped locations of deletions relative to each other using recombination.  Mapped locations of point mutations relative to the deletions. Tested for recombination between all point mutations within the same complementation group. 

7 0
4 years ago
A cell come a certain organism has 64 individual, or 32 pairs, of chromosomes. Which of these can you draw?
Dmitriy789 [7]

Answer:

B. The cell cannot be a human

Explanation:

Humans have 23 pairs of chromosomes, or 46 individual chromosomes. Mutations in humans usually cause there to be a single extra chromosome, or a single missing chromosome. A mutation would not cause there to be 64. So, A cannot be true. Prokaryotic cells usually have one chromosome, not 64, so C cannot be true. D cannot be assumed as you cannot tell if there is uncontrolled cell growth. Therefore, the answer would be B.

8 0
2 years ago
What are three species that can be raised (farmed) to take pressure off ocean species?
Juli2301 [7.4K]

Answer:

Seaweeds, shrimps, salmon

Explanation:

The rapid increase in the human population day by day has led to the increased usage of marine plants and animals. Due to this, the population f some marine plants and animals is declining to threatening levels.

To overcome his problem, scientists have devised the method of mariculture. This technique involves raising aquatic plants and animals in artificial lakes or ponds containing salty water just like in the oceans.

Some of these plants and animals are:

  1. Sea weeds: People might think that they do not consume sea weeds but it is actually present in most of our daily use products like toothpaste, ice creams and even in some automobiles. Many people from the world consume sea weeds as food. Hence, they are being raised in maricultures.
  2. Shrimps: Shrimps are favourite sea food among many people belonging to different areas. Hence, there population is declining due to which they need to be raised artificially.
  3. Salmon: The salmon is a kind of fish common to almost every nation. Hence, to meet the demands of people they need to be produced in maricultures.
4 0
3 years ago
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