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Rashid [163]
3 years ago
9

Pls help this is an assignment!!

Biology
1 answer:
lys-0071 [83]3 years ago
3 0

Answer: When we look at cells under the microscope, our usual measurements fail to work. In  objectives we use (4X, 10X, 40X and 100X) arm.  

At 100x magnification you will be able to see 2mm. At 400x magnification you will be able to see 0.45mm, or 450 microns. At 1000x magnification you will be able to see 0.180mm, or 180 microns.

Hope this helps

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The backbone is a characteristic of
jeka57 [31]

Yₒᵤᵣ ₐₙₛWₑᵣ ᵢₛ .:

_____________________________

Back bone (or vertebral column) is the character of all the species included in .:

Sub-phylum VERTEBRATA

_______of______________

Division CRANIATA

_______of____________

Kingdom ANIMALIA

3 0
3 years ago
Water harvesting, the collection of rainfall and run off for future use, has been practiced for thousands of years; but in some
lina2011 [118]

Rainwater is normally free from dangerous substances, which makes it perfect for irrigation schemes. Added significant benefit is that it decreases the requirement for fresh water. It is important particularly in regions with low water levels.

Another benefit might water harvesting have in these areas with land erosion due to runoff are as follows;

Reduces Water Shortages

In temperate areas, the strain on public water supply can become hard, even in advanced countries. Rainwater decreases the uncertainty of water shortages. Using rainwater for non-essential actions such as spraying the lawn means less pressure on the supply of safe drinking water.

Replenishes Groundwater

Extensive rainwater harvesting projects with the water collected into storage containers or tanks are important to assure a sustainable groundwater level.

Reduces soil erosion

Heavy rainfall generates erosion because some of the soil is transferred along with the passage of water. Soil erosion exhausts agricultural land of topsoil and nutrients, provides to sediment build up in waterways and, in advanced cases, can turn land inadequate for agriculture. Harvesting rain checks a great chance of soil erosion before it can originate.

4 0
4 years ago
Some animals generate two germ layers during gastrulation. They are called diploblasts. Other animals generate three germ layers
vova2212 [387]

Diploblastic blastopore - gastrovascular cavity

Protostome blastopore - mouth

Deuterostome blastopore - anus

Explanation:

Blastopores are structural indentations formed on the embryo during the gastrulation stage and this develops into mouth or anus depending upon the type of the embryo.

Diplolbastic (cnidarians) blastopores develop into the gastrovascular cavity in organisms like hydra

Triploblasts with three embryonic germ layers includes acoelomates, eucoelomates, and pseudocoelomates and the blastopores transform accordingly.

The blastopores of the triploblastic eucoelomates like the protosomes (mollusks, arthropods, annelids) transforms to the mouth, denoting ‘mouth first’; while that of the deuterostomes (chordates) transform to anus, denoting ‘mouth second’.

7 0
3 years ago
In 1918, the Russian Tsar Nicholas II was deposed, and he and his family were reportedly executed and buried in a shallow grave.
GaryK [48]

Answer:

By making a paternity test by Short tandem repeats, or STRs (microsatellites).

Explanation:

Short tandem repeats, or STRs, are microsatellites consisting of repeated sequences of 2 to 6 base pair length monomers  in tandem, and most of them have a high degree of polymorphism. Half of an individual microsatellites are inherited by each parent, and they can be assesed by PCR amplification and further electrophoresis.

In this case, you would try to recover a bone from the remainings of the woman, the Tsar and his wife, since the rest of the latest were in a shallow grave with many different individuals. Preferably, you should manipulate this samples in an ancient DNA facility (aDNA) with proper techniques. You clean the bone samples, drill them, and from internal bone powder make a DNA extraction. After this, you perform a series of PCR targeting a panel of STRs, and electrophoresis. If the woman claim is true, half of her microsatellites should have correspondence with the Tsar, and half with the ones of his wife.

4 0
4 years ago
1) 8,250 g →<br> kg<br> Metric system
nikitadnepr [17]

Answer:

Hey There!

Your answer will be 8.25kg!

Explanation:

To convert grams (g) into kilograms (kg) WE NEED TO DIVIDE BY 1000!

(Kilo : 1000)

So...

8250g / 1000

= 8.25 kg (DONT FORGET YOUR UNITS WHEN ANSWERING!)

HOPE THIS HELPS WITH YOUR WORK!

:D

8 0
3 years ago
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