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
15

WILL GIVE THE BRAINLEST

Biology
1 answer:
Lesechka [4]3 years ago
4 0

Answer:

#2 is B #3 is

Explanation:

Plant cells have cell walls around them, and animal cells don't have cell walls. The cell walls give plant cells their boxy shapes. That's nice for plants, because it gives them the ability to grow up and out, where they can get lots of sunlight for making their food.

The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression- the nucleus is, therefore, the control center of the cell.

You might be interested in
Place the 4 steps of biofilm formation, listed below, in the correct order.
makvit [3.9K]

Answer:

1. Surface (substratum) is preconditioned by environment molecules.

4. Microbes attach and detach from the preconditioned surface.

2.Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably.

3. Biofilm matures and some microorganisms escape to the plank-tonic state.

Explanation:

Biofilm is a process in which microorganism irreversibly attach and grow on the surface to produce extra cellular polymers that facilitate formation of matrix. The biofilm process takes three days for the formation after which thickness of plaque increases. There are 4 main steps in biofilm formation. Surface is preconditioned by environment molecules. The microbes attach the preconditioned surface. Establishment of extra cellular matrix and finally biofilm matures.

3 0
2 years ago
Why is it important to follow strict safety procedures when handling a urine sample
xz_007 [3.2K]

Because you could easily contaminate the results of the urine if you don't follow exactly what the strict rules dictate This could be a very dangerous thing because if you contaminate the results, then other doctors would think that the patient has some disease that needs to be taken care of which in reality they do not. The patient could also have to go through things or waste money on things that they don't need to because there was something in the urine that wasn't supposed to be there which was added because they didn't follow the strict rules. Then the doctor who contaminated it could be sued for malpractice which is never a good thing.

7 0
3 years ago
Suppose a polymerase chain reaction (PCR) amplification process begins with exactly one double-stranded template DNA. How many D
Agata [3.3K]

Answer:

1. Number of DNA molecules after 30 Cycles of PCR = 1.02 x 10^9

2. No. of mutant DNA molecules = 1.07 x 10^9

Explanation:

1. You just have to take the exponential of 2 to the power of the number of PCR cycles (2^n)

2. All copies were normal at cycle 10 that are about 1024 copies. At cycle 11 single point error, all further copies are mutated.

3 0
3 years ago
A student completed a lab report. Which correctly describes the difference between the “Question” and “Hypothesis” sections of h
Alisiya [41]
A question is something someone asks.  A hypothesis is like a person's theory.
7 0
3 years ago
Read 2 more answers
What caused by greenhouse gases?
hoa [83]

Answer:

Global warming is caused by greenhouse gasses. I am 100% sure.

PLEASE GIVE BRAINLIEST AND WATCH OUT BEHIND YOU

5 0
3 years ago
Other questions:
  • Which organisms create all usable food energy on Earth? consumers decomposers heterotrophs producers
    7·2 answers
  • Do sharks have bad vision​
    10·1 answer
  • Explain cancer in terms of the cell cycle
    15·1 answer
  • Which gas is the most abundant of the trace gases? A. nitrogen B. oxygen C. argon D. carbon dioxide
    5·2 answers
  • Pablo and Johanna have to do a yearlong study for their biology course. After some discussion, they decide to try comparing thei
    7·1 answer
  • Which of the following is NOT true of bacteria?
    7·1 answer
  • It is always important to note possible sources of error in the conclusion.
    12·2 answers
  • Why gene flow isn’t the cause of antibiotic resistance
    5·1 answer
  • You stain a sample of bacteria using the Gram stain and see gram-positive rods. You then test a sample of the same bacteria usin
    15·1 answer
  • A person who is dehydrated has a lower than normal amount of water in their blood but has the same amount of formed elements. Th
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!