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
Talja [164]
4 years ago
10

James was observing cells under a microscope. He observed some cells which had a layer outside the plasma membrane. What is this

layer called?
Biology
2 answers:
Aleonysh [2.5K]4 years ago
5 0
The cell wall as it is a very strong barrier.
irga5000 [103]4 years ago
4 0
It's a cell wall, common to some types of cells, like plant cells (one notable component of the cell wall is <span>cellulose, which is exactly where we obtain it from</span>).
You might be interested in
The small size of cells
puteri [66]

Answer:

A

Explanation:

this is because, in smaller organism their SA/V ratio is large hence they have efficient transport of materials within their cells

5 0
3 years ago
What is the oesophagus
Rama09 [41]

the part of the alimentary canal that connects the throat to the stomach; the gullet. In humans and other vertebrates it is a muscular tube lined with mucous membrane. hope that helps <3 Jacoby

7 0
3 years ago
The type of cellular nuclear division that produces two cells with the same number and type of chromosomes as the original cell:
Helen [10]
This is Mitosis, which occurs with all nucleated somatic (body) cells, but not in germ (sex) cells.
Germ cells, aka gametes, on the other hand, undergo Meiosis, a process of nuclear cell division whereby 1 parent cell gives rise to 4 daughter cells. These daughter gametes, either sperm or egg cells, all have 1/2 the number of chromosomes as the original parent, termed "haploid." The genes of these gametes were also randomly assorted and crossed-over, allowing a shuffling of their chromosomes' genes.
6 0
3 years ago
What are the 3 types of substitution mutations?.
loris [4]

Base substitutions, deletions, and insertions are the three different forms of DNA mutations.

A mutation is a long-lasting alteration to the DNA's nucleotide sequence that can occur during replication and/or recombination. Damaged DNA can change by base pair replacement, deletion, or insertion. The majority of the time, mutations are benign, unless they result in tumor growth or cell death. Cells have developed systems for repairing damaged DNA due to the deadly potential of DNA mutations.

Different Mutations

Base substitutions, deletions, and insertions are the three different forms of DNA mutations.

1. Base Replacements

Point mutations are single nucleotide replacements; you may recall the point mutation Glu ——-> Val is the culprit of sickle cell anemia. There are two types of point mutations, the most prevalent of which are.

Transition and Transversion.

Learn more about Base substitutions using this link:

brainly.com/question/15604401

#SPJ4

5 0
1 year ago
During what phase does a cell spend majority of its life
n200080 [17]
It is the inter phase in which cells  typically spend  most of its time  <span />
6 0
3 years ago
Other questions:
  • Exposure to low concentrations of a chemical over long periods of time is
    14·1 answer
  • Which nutrient aids in your body’s growth, everyday functioning, and maintenance?
    13·1 answer
  • Why are nerve receptors in the skin not evenly distributed
    14·1 answer
  • All of the substances are ____________, which cause inheritable changes in genetic material.
    10·1 answer
  • During crossing over in meiosis, an incomplete exchange of genetic material occurs. this would most likely produce
    10·1 answer
  • Mitochondria and chloroplast are similar in that they both ___ but are different in that
    5·1 answer
  • Which is true about ecosystems?
    14·2 answers
  • 4). A particular bird species found in North America obtains most of its food energy by catching and eating insects. A mutation
    13·2 answers
  • Which of the following is true of chloroplasts
    5·2 answers
  • Differentiate between the endocrine system and glands​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!