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
SSSSS [86.1K]
3 years ago
10

Although trees like this one begin life as a seed, throughout growth and development the cells of the organism continually chang

e. As a mature tree, several layers of cells in the secondary xylem or wood of the trunk are
Biology
1 answer:
loris [4]3 years ago
7 0

Answer:

they are called secondary pholem.

Explanation:

You might be interested in
HELP PLEASE !!!!!!!!
Virty [35]

Answer:

The answer to your question is below

Explanation:

Balance the following equation

                          1  N₂    +   3 F₂     ⇒   2 NF₃

                                   2  -   N    -   2

                                   6  -   F    -   6

5 0
3 years ago
The____ secretes enzymes that aid in the digestion of carbohydrates, fats, and proteins.
aksik [14]
Lingual lipase starts the digestion of the lipids/fats. Salivary amylase<span>: Carbohydrate digestion also initiates in the mouth. </span>Amylase<span>, produced by the </span>salivary<span> glands, breaks complex carbohydrates to smaller chains, or even simple sugars. It is sometimes referred to as ptyalin.</span>
5 0
3 years ago
Read 2 more answers
Some cells undergo nuclear division but not cytokinesis t/f
emmainna [20.7K]

Answer: false

Explanation:

I’m doing the test right now

7 0
3 years ago
With the use of site-directed mutagenesis, hemoglobin has been prepared in which the proximal histidine residues in both alpha a
nirvana33 [79]

Answer:

The modified hemoglobin with free imidazole cannot be expected to show cooperativity in oxygen binding. The movement of iron ion takes place up in the plane of heme when binding of one subunit of hemoglobin takes place with oxygen. One of the iron's and oxygen's axial ligands comprise the proximal histidine's imidazole ring.  

With the movement of iron into the hemoglobin ring, the pulling of proximal histidine takes place along with it. Therefore, when binding of oxygen takes place with one subunit, a modification also takes place in the intersubunit associations, this also comprises displacement of the alpha helix. This phenomenon plays an essential role in modifying the hemoglobin's tensed state to the relaxed state. The withdrawal or mutation of the imidazole ring from the histidine residue does not further permit the cooperative binding as it is not associated physically with the alpha-helix.  

7 0
4 years ago
There are more species in tropical areas than in places more distant from the equator. this is probably a result of _____.
slega [8]
The temperature of tropical areas relative to places more distant to the equator. Another reason why is higher nutrient cycling, which is also an effect of higher temperature.
8 0
3 years ago
Other questions:
  • PLEASE HELP I'M STUCK AND I'LL GET A 0 !What do Carnivores consume?why might carnivores be called Secondary consumers?(I'm givin
    5·2 answers
  • The newly-hired nurse is monitoring a client for adverse reactions during barbiturate therapy. the nurse preceptor asks what is
    12·1 answer
  • What does Archimedes’ Principle state?
    7·1 answer
  • When enzymes in your body digest your food, what type of biomacromolecule is at work?
    12·2 answers
  • Good movie recommends? My teacher said I get to choose the movie for today
    8·2 answers
  • . Which type of air holds more water vapor?
    8·2 answers
  • What volume will 1.2 mol of N, occupy at 17°C<br> and 2.0 atm?
    11·1 answer
  • Can someone plz help me on this science its due today and STAAR test is next week
    10·2 answers
  • PLEASE if you see these people (they all seem to have the same profile picture) NOTIFY THE PERSON ASKING THE QUESTION THAT THIS
    11·2 answers
  • Hi peeps! :D <br>Question of the day: What is your fav tv show?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!