32. Explain why it is hard to classify organisms in Kingdom Protista? What are the definincharacteristics of the kingdom?

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Answer 1
Answer:

Answer:

There are some organisms which are not classified in plants and animals kingdom because there are some animals which has the characteristics of both plants and animals. For example, a specific organism make their own food like plants and also move from one place to another like animals.

Characteristics of kingdom protists :

1) They are made of one cell.

2) They are eukaryotic cell.

3) Some are autotrophic and some are heterotrophic organisms.


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Develop a plan to test the hardness of a sample of feldspar using glass copper and a streak plate

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Wait are you asking for us to make a plan or what? if so ill do it but im confused a little

During which step of mitosis does a new membrane form around each of the 2 groups of chromosomes?

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Mitosis is simply described as having four stages—prophase, metaphase, anaphase, and telophase; the steps follow one another without interruption. The entire four-stage division process averages about one hour in duration, and the period between cell divisions, called interphase or interkinesis, varies greatly but is considerably longer.

During interphase the chromosomes are dispersed in the nucleus and appear as a network of long, thin threads or filaments, called the chromatin. At some point before prophase begins, the chromosomes replicate themselves to form pairs of identical sister chromosomes, or chromatids; the deoxyribose nucleic acid (DNA) of the chromosomes is synthesized only during interphase, not while mitosis is in process.

During prophase the two chromatids remain attached to one another at a region called the centromere, but each contracts into a compact tightly coiled body; the nucleolus and, in most cases, the nuclear envelope break down and disappear. Also during prophase the spindle begins to form. In animal cells the centrioles separate and move apart, and radiating bundles of fibers, called asters, appear around them. Some sets of fiber run from one centriole to the other; these are the spindle fibers. In plant cells the spindle forms without centrioles.

During metaphase the chromosomes congregate at a plane midway between the two ends to which the spindle tapers. This is called the equatorial plane and marks the point where the whole cell will divide when nuclear division is completed; the ends of the spindle are the poles to which the chromatids will migrate. The chromatids are attached to the spindle fibers at the centromeres.

During anaphase the two chromatids of each chromosome separate and move to opposite poles, as if pulled along the spindle fibers by the centromeres. During telophase new nuclear envelopes form around the two groups of daughter chromosomes (as they are now called), the new nucleoli begin to appear, and eventually, as the formation of the two daughter nuclei is completed, the spindle fibers disappear. The chromosomes uncoil to assume their dispersed distribution within the interphased nucleus. Cytokinesis, which may begin before or after mitosis is completed, finally separates the daughter nuclei into two new individual daughter cells.

A considerable variance in the degree and timing of these stages exists across species, and cells can be classified by their mitotic characteristics. Despite the relative ease of observation of the physical stages of mitosis under the microscope (primarily because the chromosomes stain readily when in their coiled state), the exact chemical and kinetic nature of mitosis is not yet fully understood. For instance, the spindle has been determined to consist largely of thin, elongate tubules called microtubules, but their functions have yet to be understood.

What's the scientific name of a flathead bullhead catfish?

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It is called "Ameiurus".

__ is made of dead plant and animal matter that has decayed due to bacteria and fungi. (I'm pretty sure it C horizon?)

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This would be the topsoil or A horizon 
made up of organic matter like dead plant and animal matter
:P hope this helps 

What role do hypotheses play in scientific inquiry

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Hypothesis plays an important role in scientific inquiry because are derive from the observations and data that are being gathered. Hypothesis is smart guess that is often used to prove whether or not it is correct or wrong. Hypothesis is often affirmed after the experimentation.

a volume of helium occupies 11.0 L at a pressure of 98.0 kpa. what is the new volume if the pressure drops to 86.2 kpa​

Answers

12.506 L

Explanation:

We’ll use Boyle's Law of ideal gases;

P₁V₁ = P₂V₂      whereby;

P – pressure

V – volume

We replace variable with given values;

98 * 11 = 86.2 * V₂

V₂ = 98 * 11 / 86.2

V₂ = 12.506 L

Learn More:

For more on Boyle's Law of ideal gases check out;

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