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stepan [7]
2 years ago
6

Fish hatcheries in the mountain states are hoping to begin a breeding program that combines the best features of two fish variet

ies to create a super fish; one that could withstand the extremes in water temperatures as well as water pH. Scientists want to find a fish that they can breed with brown trout, a hardy fish that can withstand many adverse environmental conditions. Based on the DNA profiles of the four trout varieties, which fish would be the best choice for the breeding program? A) Brook trout B) Golden trout Eliminate C) Rainbow trout D) None of the three as they are different species.
Biology
1 answer:
Karo-lina-s [1.5K]2 years ago
8 0

Its C - Rainbow Trout

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An octopus reproduces only once in its life, but it may have more than 100,000 offspring, depending on the species. Certain spec
galina1969 [7]

Answer:

<em>The correct option is C) The success of a species depends on the number of offspring that survive long enough to reproduce.</em>

Explanation:

Some species of animals such as the octopus might give rise to many offspring, but these offspring might not survive due to different reasons. Only a few of them will be able to survive until the age where they can reproduce.

On the other hand, the survival rate of offspring which are formed in lesser numbers is more. These offspring are taken care of by their parents usually or are better adapted to live in the environment. Hence, their survival rate is more.

6 0
2 years ago
When a coelom is formed by introducing a gap surrounded by mesodermal cells at the base of the blastula, between the ectoderm an
mariarad [96]
Schizocoelic development

The coelom is a fluid-filled body cavity, where the internal organs are suspended in. It is the cavity between the wall of the body and the digestive tract.

In the schizocoelic development of the embryo, the coelom, called the schizocoel, develops as a split in the mesoderm. The outer layer of the mesoderm attaches with the ectoderm to form a body's musculature, while the inner layer attaches with the endoderm to form the wall of the digestive tract. 

This type of development is commonly found in annelids, arthropods, and mollusks. 

3 0
2 years ago
If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the haematocrit is _______
nordsb [41]

Answer:

If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the hematocrit is <u>41,02%</u> percent. The hematocrit value is <u>within the normal</u> range.

Explanation:

Hello!

Hematocrit (or packed cell volume -PCV-)is defined as the percentage of red blood cells (vol%) in a blood sample. One common method of determining it is by centrifuging a heparinized blood sample in a capillary tube at 10 000 RPM for five minutes. This separates the blood sample in two layers, formed elements (RBC and WBC) and Plasma.

The length of the layers is directly measured from the tube and represents the volume of packed cells and plasma. Since the number of white cells is negligible compared to the number of red cells, the formed elements are considered to represent the red blood cells.

The hematocrit can be calculated as the volume of packed cells divided by the total volume of the blood sample.

\frac{PCV}{TOTAL(pcv+plasma} * 100

<u>In the question:</u>

\frac{32}{32+46} * 100 = \frac{32}{78} * 100 = 41,02%

In humans the normal hematocrit range is 40,7% to 50,3% for men and 36,1% to 44,3%. Taking these reference values into consideration, this sample is within the normal range.

I hope you have a SUPER day!

4 0
2 years ago
A farmer is being troubled by coyotes eating his sheep. in an attempt to solve the problem, he kills a sheep and laces its body
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The correct answer is "conditioned taste aversions".

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7 0
2 years ago
What is auretic growth
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A thoracic aortic aneurysm is a weakened area in the upper part of the aorta. The aorta is the major blood vessel that feeds blood to the body.

8 0
2 years ago
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