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OLEGan [10]
2 years ago
11

Which std is characterized by having three stages?

Biology
2 answers:
GaryK [48]2 years ago
8 0
Every std has stages of atleast 3
Kazeer [188]2 years ago
4 0
Syphilis is a STD (sexual transmitted disease) that can be acute or chronic. Symptoms occur in three stages, characterized by a sore in the mouth or genital area, followed by a rash, and, if untreated, can progress to more serious issues such as blindness, paralysis, dementia, deafness, and death.
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Describe two typical applications for each of the following types of microscope
Veseljchak [2.6K]
A.Transmission electron microscopes are a versatile tool for many fields, including medicine, biology, nanotechnology, metallurgy, forensics, electronics, material science, and much more. A biologist might use a TEM to look at the internal structure of a cell.

b. Industries including microelectronics, semiconductors, medical devices, general manufacturing, insurance and litigation support, and food processing, all use scanning electron microscopy as a way to examine the surface composition of components and products.

c.Brightfield Microscope is used in several fields, from basic biology to understanding cell structures in cell Biology, Microbiology, Bacteriology to visualizing parasitic organisms in Parasitology. Most of the specimens to viewed are stained using special staining to enable visualization.

d.A dissecting microscope is used to view three-dimensional objects and larger specimens, with a maximum magnification of 100x. This type of microscope might be used to study external features on an object or to examine structures not easily mounted onto flat slides.
5 0
2 years ago
Blood type is a genetically determined trait. Two siblings donate blood and find out their blood types. The brother is Type A an
rjkz [21]

Answer:

C

Explanation:

The brother has different alleles for the blood type gene than his sister does.  Blood type is inherited from parents like many other traits that can be displayed on a punnet square.  Depending on what the parents blood type alleles were, the brother and sister could have different blood types.  

A different number of chromosomes doesn't lead to different blood types, so D is wrong.  And A is incorrect because the number genes also does not affect blood type.  And I think the blood type genes are on the same chromosome, so B is wrong.  C is correct because blood type is inherited by alleles, and different alleles can cause different traits, such as blood types.  

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2 years ago
The light dependent reactions take place in thea)matrix of the mitochondria.
Marrrta [24]
D: The reactions take place in the thylakoid of the chloroplast.
3 0
3 years ago
Read 2 more answers
DNA is a nucleic acid polymer composed of wh
lianna [129]
R// Phosphate groups
4 0
3 years ago
5 facts about the reproductive system
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<span>After you ovulate, your egg is fertile for between 24 to 48 hours and a man’s sperm can survive in the female body for 48 hours. There have actually even been documented cases of live sperm surviving in the female reproductive system for eight days after intercourse!One breast is always larger than the other. Most of the time, it goes without notice but it is typical for breast size to be slightly mismatched. Some women can be born with two uteruses or two vaginas and have no idea until they notice abnormal menstruation or excessive bleeding. You are born with all the eggs you will ever have in a lifetime which can be anywhere from thousands to millions however, only about 300 to 400 of these eggs will mature and be released for fertilization. <span>You ovaries take turns each month releasing eggs.</span></span>
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3 years ago
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