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melisa1 [442]
3 years ago
9

PLEASE HELP FAST!!!!!

Biology
1 answer:
butalik [34]3 years ago
7 0
In order from least to most dense, it must be: C, B, A and D. Seawater with high temperature causes an object to float, while seawater with low temperature sinks or is denser than high temperature. Salinity is also a factor to determine density; the higher the salinity, the denser the water. In terms of depth, it seems that sample D is the deepest part while sample A is the shallowest. This is determined because temperature drops significantly with depth. 
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4. What technique would a scientist use to produce many copies of a<br> desired piece of DNA?||
yawa3891 [41]

Answer:

They can use a technique called Polymerase Chain Reaction. This can be done in a test tube or even in a organism. It usually relies on something called  Thermostable DNA Polymerase and Taq polymerase. It requires DNA primers that is designed specifically for that DNA region (interest).

6 0
3 years ago
What helps identify cell types
uranmaximum [27]
CARBOHYDRATE HELPS TO IDENTIFY CELL TYPES.
Carbohydrates, proteins and lipids are all present inside the cell. Carbohydrates are usually attached to the cell proteins and lipids in order to enhance their functionality. These attached carbohydrates are typically used to identify cells.
8 0
4 years ago
What would most likely be the outcome to planar cell polarity if calcium were removed from the tissue?
andrew-mc [135]

<u>Answer:</u>

If calcium were removed from the tissue then the polarity will be established within the cell but polarity will be lost in the tissue.

<u>Explanation:</u>

  • Cell polarity is the cellular components like cytoplasm, plasma membranes and other various cell organelles in the asymmetric order.
  • The coordinated arrangement of this cell polarity in tissue plane is called as planar cell polarity (PCP).
  • Calcium is the major component in the tissues that helps in formation of bones and other parts of body, if it is removed then the polarity will not be seen in the tissue, but in the cell the polarity will be established.
8 0
3 years ago
Bundles of axons in the central nervous system are called
Karolina [17]

Answer: Bundles of axons in the central nervous system are called a "tract"

Explanation:

Axons(nerve fiber) consist of long slender projection of neurons or nerve cells that conduct and transmit impulses away from the neuron or nerve cell body. Axons are surrounded by endoneurium layer which contain protein fluid that surround each axon.

Bundles of axon in the CNS is known as tract. We have ascending tracts and descending tracts. The ascending tracts function are to conduct and carry impulses along the spinal cord to the brain while the descending tracts transmit and carry the impulses from the brain to lower regions (downward) of the body. Tracts are identified by their origin (where the bundle start) and also the end/termination of axon bundle.

The largest tracts are fasciculi gracilis and cuneatus which are known as ascending tracts.

7 0
3 years ago
Blue whales have 44 chromosomes in every cell. determine how many chromosomes you would expect to find in the following:Sperm ce
baherus [9]

Sperm cell: We expect to find 22 chromosomes.

The spermatozoon is a small cell (5 micrometers in diameter), much smaller than the ovum, but with a movable tail (a flagellum) 60 micrometers long. To be lightweight and mobile, to quickly reach the egg, the sperm gains space by minimizing its cytoplasm and compacting its DNA. Head is covered with the acrosome, a pocket full of enzymes that will be used to pierce the membrane of the egg.

It is a haploid cell because it contains half of the genetic material of the individual, lost at the time of meiosis during the process of spermatogenesis that the primordial germ cells undergo in the seminiferous tubules of the testes.


Egg Cell: We expect to find 22 chromosomes.

The egg is the sexual cell (or gamete) produced by the females of the animals.

Like all gametes, the egg is haploid, it contains half of the chromosomes of the future embryo, so the number of chromosomes will be 22 instead of 44. Then this egg will meet a sperm cell to gather their chromosome and form an embryo of 44 chromosomes.


Daughter Cell from Mitosis: We expect to find 44 chromosomes.

Mitosis, which ensures the birth of cells identical to the mother cell during asexual multiplication (so the number of chromosomes will remain the same, it will not divide in two).

Mitosis is an asexual cell division. This means that it is just a division of a mother cell into two daughter cells, which will inherit exactly the same genetic inheritance.


Daughter Cell from Meiosis II: We expect to find 22 chromosomes.

Meiosis is a particular mode of division of the living cell by which an initial cell with 2n chromosomes (in this case 2n = 44 chromosomes), a diploid stage, gives rise to four daughter cells possessing only n chromosomes, a haploid stage (n = 22 chromosomes). Meiosis is one of the forms of cell reproduction, this process is performed on the gonads to produce gametes.

4 0
3 years ago
Read 2 more answers
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