b. less water would need to be excreted by the kidneys.
c. they don't have kidneys.
d. their cells would eventually swell.
The best answer is A.
Unlike marine animals such as fish, land vertebrates do not have mechanisms to excrete high salt content. Their excretory organs namely the kidneys are not designed to handle concentrated salt content.
Therefore if high salt content is retained in the body, then osmotic imbalance in cells of land vertebrates would occur with the cells losing water because they would be hypotonic to their immediate surrounding and eventually die.
Marine fish are able to maintain osmotic balance in the sea water because they have specialized cells in their gills that actively eliminate salt and these fishes do not absorb any salt from the water they drink.
In the 1950s, Both Watson and Crick were working on the composition of DNA, that is, the molecule that comprises the hereditary information for cells. The discovery of the double-helix, and the twisted ladder composition of DNA, by Watson and Crick, signified a landmark in the field of science and paved the path for the origination of modern molecular biology.
However, when Watson and Crick were working on DNA model, some of the concepts were well accepted by the scientific community like the chromosomes are formed of nucleic acid and protein, chromosomes are found in the nucleus, and genes are located on the chromosomes.
False
Answer:
True
Explanation:
If you look at your keyboard, the first letters are QWERTY. This is the standard keyboard layout
Answer:
true
Explanation:
:D
-sharp decrease in global temp
-faster rate of photosynthesis
-acid rain
Answer:
-acid rain
I hope this helps
B-centrioles
C-mitochodria
D-central vacuole
The centrosome is present outside the nucleus in an animal cell. It is the structure that contains centrioles. These are the structures that are essential during cell division. The plant cells lack centrioles and are able to divide in their absence.
Further Explanation:
The centrioles are present particularly in animal cells and are located within the centrosome which is present near the nucleus. The centrosome is a granular mass that acts as a center for microtubules. The centrioles are two in numbers and are positioned at the right angle with respect to each other. Each centriole is composed of microtubules forming nine bundles that are arranged in a ring formation.
In an animal cell during interphase, the components of the centrosome along with the centrioles are doubled. Initially, the duplicated pairs of centrioles remain close to each other but with the initiation of mitosis, the pairs tend to separate and get located in the newly formed microtubule-organizing centers. The microtubules are radiated through these centers in the star-shaped clusters called asters. With the movement of asters towards the opposite poles, the microtubules span the cell attaining a spindle-shaped formation. The spindle fibers help in the alignment of chromosomes during their separation at the time of cell division.
In animal cells, centrioles are important for mitosis to take place whereas reproduction in plant cells can occur even without centrioles. The presence of centrioles in animal cells has made mitosis an efficient and error-free process while its absence results in divisional errors and also delays the mitotic process.
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Answer Details:
Grade: High School
Chapter: The Cell
Subject: Biology
Keywords:
Cell, centrosome, centriole, granular mass, microtubules, interphase, duplication, cell division, mitosis, spindle formation, asters, microtubule organizing center, chromosomes, reproduction, animal cell, plant cell.
b. friction
c. gravity
d. pressure