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
adell [148]
2 years ago
11

A scientist conducts an experiment on a virus and a species of bacteria. The virus and the bacteria are put in the same Petri di

sh for 24 hours and provided a food source. The scientist notices that the number of bacteria increases significantly, whereas the virus makes no change
Biology
1 answer:
Vinvika [58]2 years ago
6 0

Answer:

the scientific knows this answer hahhahahahahahahahahhahahahahhahahahahahahahaaahhahahahahhahahahahhahahahhahahahha

Explanation:

ajjajahshgagagaggaahhahahahah

You might be interested in
. ¿Cuál de las siguientes características diferencia a las células procariontes de las eucariontes? *
jenyasd209 [6]

Answer:

La respuesta correcta es opción C. "Contar con organelos membranosos como los cloroplastos".

Explanation:

Una de las características que diferencia a las células procariontes de las eucariontes, es que las células eucariontes tienen organelos membranosos como los cloroplastos. Las células eucariontes son más complejas que las celulas procariontes, y tienen organelos rodeados por membranas donde efectúan sus distintas funciones celulares. Las células procariontes no tienen organelos y realizan la mayoría de sus funciones directamente en el citoplasma.

3 0
3 years ago
The retinoblastoma protein, pRB, is a tumor-suppressor protein that controls the G1/S cell-cycle checkpoint. While pRB is presen
gladu [14]

Answer:

1. pRB phosphorylated: The cell will not remain in G1 phase i.e. it will enter S phase because pRB will be degraded.

2. pRB not phosphorylated: The cell will remain in G1 phase i.e. will not enter S phase because pRB will remain bound to E2F.

3. pRB bound to E2F: The cell will remain in G1 phase i.e. will not enter S phase.

4. pRB not bound to E2F: The cell will not remain in G1 phase i.e. it will enter S phase.

5. E2F bound to DNA: The cell will not remain in G1 phase i.e. it will enter S phase.

6. CDK4 bound to Cyclin D1:  The cell will not remain in G1 phase i.e. it will enter S phase.

Explanation:

Retinoblastoma protein, pRB supresses tumor by regulating cell cycle progression in G1 phase. When a transcription factor known as E2F is bound to pRB the cell remains in G1 phase and did not proceed further to enter S phase. But as soon as pRB becomes phosphorylated, E2F becomes free and causes gene expression of cyclin E and and cyclin A which are required in progression of cell cycle from G1 phase to S phase.

<u>Signaling involved in cell cycle progression from G1 phase to S phase. </u>

When a cell is unstimulated, pRB is bound to E2F but G1 phase specific growth factors induce the expression of cyclin D through Ras-MAP kinase pathway.

Synthesis of cyclin D leads to the activation of CDK-4 which is a serine-threonine kinase. This kinase causes phosphorylation of pRB which results in the degradation of pRB.

Because of degradation of pRB, <u>E2F becomes free</u> and leads to the expression of cyclin E and and cyclin A which are S phase specific cyclins. This is how cell progresses from G1 phase to S phase.

E2F is a transcription factor which causes expression of S phase specific cyclins i.e. cyclin E and and cyclin A. So, E2F bound to DNA will result in cell cycle progression from G1 phase to S phase.

7 0
3 years ago
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
pychu [463]
Answer: B archea

Explanation
6 0
3 years ago
Read 2 more answers
If a nutrient were in short supply in an ecosystem, how might it affect an organism
DedPeter [7]
The organism wil probably die
4 0
3 years ago
Much of the energy used by people in both rural and urban areas is used for the same thing. However, ____________________ is pra
Archy [21]
The answer should be agriculture.

Agriculture means farming of crops or the rearing of animals, either for their own use or for commercial purposes. Rural area means a place away from the city, opposite of urban areas, with little buildings and most likely have a smaller population.

On the other hand, construction and manufacturing most likely is going to be common in urban area, as urban area is more likely to have more buildings being built and most of the products are made in the factories in urban areas. Therefore, the only activity that is almost practiced exclusively in rural area is agriculture. Urban areas don't have much space and well environment for agriculture activities.

Agriculture activities can be energy consuming as some may require different machines to help with farming processes such as harvesting or irrigation.
7 0
3 years ago
Read 2 more answers
Other questions:
  • A meter is a unit of length. How many meters are there in one kilometer (km)
    12·1 answer
  • What gas is a reactant in aerobic cellular respiration?
    13·1 answer
  • The principal advantages of asexual reproduction are what
    5·1 answer
  • Nancy is about to give a presentation to her school’s advisory board about some upcoming changes to their Nursing program. She w
    9·2 answers
  • Brainleist for answering #12 and #13
    9·1 answer
  • What is a non living part of the ecosystem
    11·1 answer
  • Question 5 of 10
    13·2 answers
  • jak nazywa sie proces w którego wyniku powstaja chmury : a) parowanie b) skraplanie c) krzepiecie d) topienie​
    11·1 answer
  • When California recently (June 2015) passed a law banning the personal belief exemption of routine childhood vaccines Jim Carrey
    5·1 answer
  • How is it possible to find the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!