1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tju [1.3M]
3 years ago
14

What is the chemical name for the compound with the formula Na 2 s?(sodium(Na) has one valance electron and sulfur (s) has 7 val

ence electrons.)
A sodium sulfide
B sodium sulfate
C sulfur bisulfate
D sulfur sodate
PLease help
Biology
1 answer:
12345 [234]3 years ago
6 0
It would be A: Sodium Sulfide. 
You might be interested in
The mother of a 10-year-old boy with mild scoliosis asks the nurse, "how long will my son have to continue his exercises before
fiasKO [112]
<span>The mother of a 10-year-old boy with mild scoliosis asks the nurse, "how long will my son have to continue his exercises before he's better?" how should the nurse respond?</span>
5 0
3 years ago
Adaptive immunity comprises two branches: humoral immunity and cellular immunity. What are the characteristics of each of the tw
kotegsom [21]

Answer:

Adaptive or acquired immunity is that we acquire throughout our lives through vaccines (active), breast milk (passive) or injection of specific artificial or natural antibodies to a certain pathogen (passive).

The two great arms of this immunity are the humoral and the cellular.

The humoral refers to the cytokines and immunomodulatory molecules that are responsible for transmitting fundamental messages between defense cells in order to coordinate the destruction of the pathogen between them.

Instead, cellular immunity speaks about cell lineage such as b, t, tcd4 lymphocytes, natural killers, plasmacytes, etc.

It can be said that the humoral factor is the one that coordinates the pathways and the relationships between the cells of the acquired immunity, both are important because the two need each other for adaptive immunity to work.

Explanation:

Examples of the humoral factor: pro and anti inflammatory cytokines, interleukins, complement chain, antibodies, TNF alpha, beta, etc.

Examples of cellular factor: plasmacyst, b lymphocyte, t lymphocyte, NT lymphocyte

6 0
3 years ago
Match the food with the term that describes it.
shepuryov [24]

Answer:

Potato - Tuber

Peach - Drupe

Apple - Pome

Explanation:

7 0
3 years ago
Read 2 more answers
Using the drop-down menus, label the parts of an
jasenka [17]

Answer:

Label A: amino group

Label B: R group

Label C: carboxyl group

Explanation:

6 0
3 years ago
Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37°C i
Alexxandr [17]

Answer:

The term which can be used for this species is psychrophile. Psychrophilic bacteria are the bacteria which love to grow at low temperature. The optimum they like to grow is 15°c and the highest temperature they grow is 20°c.  

The minimal temperature a psychrophile grows is zero degree Celsius so a psychrophile can grow easily at refrigeration temperature which is 4°c. Phychrotrops are bacteria which can grow at cold temperature but tends to grow well above 15-20°c.

Therefore according to this question, there was no growth at 37°C and 50°C, very slight growth out on the benchtop, and abundant growth at refrigeration which determine that the species is a psychrophile.

8 0
3 years ago
Other questions:
  • What differences can you see when you compare the nucleus of a dividing cell with that of a nondividing cell? (I am giving 44 po
    10·1 answer
  • For women, the hormones estrogen and fsh are both necessary for the:
    13·1 answer
  • Basal metabolism is the largest component of total energy expenditure. True or False
    10·1 answer
  • What are the main differences between living cells and viruses
    12·2 answers
  • Identify the parts of the nervous system.<br>A._____<br>B._____​
    9·1 answer
  • Help which is it!?!
    8·1 answer
  • Which one is it I am confused A,B,C or D
    8·2 answers
  • Houses have been built around a small retention pond, increasing the fertilizer runoff into the pond. This has led to algal bloo
    13·1 answer
  • The primary responsibility of the pelvic and hip region is ______________ during ___________ chain motion.
    8·1 answer
  • Which of the following answer choices best describes the image shown above?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!