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
DerKrebs [107]
2 years ago
12

Discovery of penicillin.​

Biology
1 answer:
masya89 [10]2 years ago
8 0

But it was not until 1928 that penicillin, the first true antibiotic, was discovered by Alexander Fleming, Professor of Bacteriology at St. Mary's Hospital in London.

You might be interested in
Paper chromatography is a technique used to separate molecules based upon their size and solubility in a particular solvent. If
Tanya [424]

Answer:

a. Paper chromatography would separate the pigments into several bands that appear green or yellow/orange.

Explanation:

The primary or main pigment in plants is the chlorophyll. The chlorophyll gives plants their characteristics green colour and helps in the absorption of light during photosynthesis.

Other pigments in plants include carotenoid with its characteristic yellow, red or orange colour; anthocyanin with its re/blue colour and betalains with its red/yellow colour.

<em>Hence, if pigments from a particular species of plant are extracted and subjected to paper chromatography, one would expect the pigments to be separated into several colour bands ranging from green to yellow/orange.</em>

The correct option is a.

4 0
2 years ago
The ovum does not complete meiosis ii until after fertilization
lakkis [162]
True , hope this helps
7 0
3 years ago
Which of these is a function of the circulatory system
bazaltina [42]
The main function of the circulatory system is to move blood and lymph<span> through the body. Doing this transports nutrients and oxygen to the cells of the body and removes waste products such as carbon dioxide.</span>
4 0
2 years ago
Read 2 more answers
Which statement is correct?
notsponge [240]

Fungi do have cell walls. Therefore A is ❎

Fungi and protist are eukaryotic. Therefore B is ✅

Fungi do not undergo photosynthesis. Therefore C is ❎

Fungi are heterotrophs, not autotrophs. Therefore D is ❎



Hope it helped,


BioTeacher101

4 0
3 years ago
Read 2 more answers
Did you remind the predicted phenotype ratio and children of dihybrid parents that are both right-handed and posses free ear lob
kirill115 [55]
Did you remind<span> the </span>predicted phenotype ratio<span> and </span>children<span> of </span>dihybrid parents<span> that are </span>both right-handed<span> and </span>posses free ear lobes<span> - 2159873.</span>
5 0
3 years ago
Other questions:
  • When the sense of smell is blocked, as when we have a cold, foods do not taste the?
    14·1 answer
  • Which is a complication of rheumatic heart disease? cardiac arrest valve vegetations and stenosis tachycardia transposition of t
    10·1 answer
  • Select the correct answer.
    7·1 answer
  • There are two different food chains in this example: 1. Spinach --&gt; goat --&gt; human --&gt; tiger 2. Spinach --&gt; goat --&
    6·2 answers
  • Which is not a true statement about goals? Choose all that apply.
    7·2 answers
  • Oxidative metabolism takes place in the ___________________ of the cell.
    14·1 answer
  • All cells in an embryo have the same DNA. However, the embryonic cells form organs, such as the brain and the kidneys, which hav
    6·1 answer
  • Số lượng tế bào vi khuẩn E.Coli sau nuôi cấy thu được 32.104 tế bào. Thời gian để VK phân chia tăng số lượng tế bào, biết số lượ
    9·1 answer
  • 20 points
    7·1 answer
  • 32 POINTS!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!