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Paul [167]
4 years ago
12

·four valence electrons ·can form rings and/or chains ·unique chemical bonding properties ·forms covalent bonds with numerous el

ements Some of the characteristics of _________ are listed. These characteristics result in the formation of millions of organic compounds, many of which are synthesized and found within cells. A) carbon B) hydrogen C) oxygen D) water Eliminat
Biology
1 answer:
nydimaria [60]4 years ago
3 0
Carbon. The easiest way to answer this is to look at a periodic table and single out the only element that has four valence electrons.
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Feliz [49]
Pardon? I don’t understand the question
4 0
3 years ago
Determine the phenotypic ratios of the offspring. 9 yellow-inflated : 3 yellow-constricted : 3 green-inflated: 1 green-constrict
skad [1K]

From a cross between dihybrid individuals, whose diallelic genes code for one trait each, expressing complete dominance, the phenotypic ratio is B) <em>9 green-inflated : 3 green-constricted : 3 yellow-inflated :1 yellow-constricted.</em>

-------------------------------

<em />

<em>Since I do not have the cross, I will assume the cross involves two dihybrid individuals by looking at the options.</em>

So, let us picture the situation,

  • Two diallelic genes code for one trait each, color and inflated/constricted pods.
  • G allele is the dominant and codes for green pods
  • g allele is recessive and codes for yellow pods
  • I is the dominant allele and codes for inflated pods
  • i is recessive and codes for constricted pods
  • These genes are not linked

1st Cross)   Two h0m0zyg0us individuals

Parental)  GGII     x     ggii

F1) 100% GgIi

2nd Cross) Selfcross between F1 individuals

Parentals)   GgIi    x    GgIi

Gametes) GI, Gi, gI, gi

                GI, Gi, gI, gi

Punnett square)     GI        Gi        gI       gi

                     GI      GGII     GGIi   GgII   GgIi

                     Gi      GGIi      GGii   GgIi   Ggii

                      gI      GgII     GgIi    ggII    ggIi

                      gi      GgIi     Ggii    ggIi     ggii

F2)    Genotype

  • 1/16 GGII
  • 2/16 GGIi
  • 1/16 GGii
  • 2/16 GgII
  • 4/16 GgIi
  • 2/16 Ggii
  • 1/16 ggII
  • 2/16 ggIi
  • 1/16 ggii

   

       Phenotype

  • 9/16 G-I- ⇒ Green and Inflated
  • 3/16 G-ii ⇒ Green and constricted
  • 3/16 ggI- ⇒ Yellow and inflated
  • 1/16 ggii ⇒ Yellow and constricted

Phenotypic ratio 9:3:3:1

<u>Options</u>

<u />

A) 9 yellow-inflated : 3 yellow-constricted : 3 green-inflated: 1 green-constricted ⇒ NOT CORRECT

B) 9 green-inflated : 3 green-constricted : 3 yellow-inflated : 1 yellow-constricted ⇒ <u>CORRECT</u>

C) 9 green-constricted : 3 green-inflated : 3 yellow-constricted : 1 yellow-inflated ⇒ NOT CORRECT

D) 9 yellow-constricted : 3 yellow-inflated : 3 green-constricted : 1 green-inflated ⇒ NOT CORRECT            

-----------------------------

Related link:  brainly.com/question/1185199?referrer=searchResults

                       brainly.com/question/12541734?referrer=searchResults

5 0
3 years ago
People who have AIDS are more likely than others to become ill with multiple infections because the pathogen that causes AIDS
Sergeu [11.5K]

<span>People who are infected with AIDS has more tendency to acquire multiple infections because the pathogen that causes acquired  immunodeficiency syndrome (AIDS) damages the immune system of a patient by destroying the white blood cells that fight infection. If the CD4</span>+ T cell count below 200 cells per µL and presence of specific diseases in association with an HIV infection are observe in an individual, then this could be an indication of having an AIDS.

Moreover, opportunistic infections or cancer may take advantage of a very weak immune system, an individual can develop an influenza-like illness with signs and symptoms that includes swollen lymph nodes, fever, rash, weight loss, diarrhea and cough.

 

6 0
4 years ago
Read 2 more answers
Murray is observing a bacterial colony that is growing in agar in a petri dish. Agar is processed seaweed. Murray calculates tha
Marysya12 [62]

The correct answer is: a. the agar and air in the petri dish are providing all of the resources needed by the bacteria.

There are four phases of bacterial growth:

1. Lag phase-bacteria prepare for reproduction

2. Log phase- cell doubling

3. Stationary phase- due to a growth-limiting factor

4. Death phase.


3 0
4 years ago
The system that exchanges carbon dioxide and oxygen and helps in speech is the _____ system, whereas the system that transports
vlabodo [156]
Heart and the lungs transport
5 0
3 years ago
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