answer.
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
s344n2d4d5 [400]
2 years ago
7

Leaves have air spaces to allow for carbon dioxide and oxygen to move into and out of cells for photosynthesis, which causes wat

er to evaporate and creates greater tension on the mesophyll cells. How do xylem vessels and tracheids prevent collapse in these conditions?
a. Photosynthesis is reversed at times to bring together oxygen and hydrogen ions
b. Metabolic dehydration reactions provide excess water to replace it
c. The turgor pressure of surrounding cells pushes the mesophyll cells into shape
d. Lignin keeps water flowing through the cells
e. Rings maintain their tubular shape
Biology
1 answer:
geniusboy [140]2 years ago
6 0

Answer:

They have  helical thickening of lignin in their walls to prevent collapse

Explanation:

the primary function of Xylem and its conducting vessels tracheids is to provide  support and tranport  water and  minerals  in plants.

Xylem vessels  have layers of dead materials in the walls called LIGNIN.   Lignin is a polymer; a  very strong, hard materials that stop water passage  through it,because it contains dead cells,

Therefore  the presence of  deposit of these strong  impermeable, ligified  walls  in its  walls  prevent its collapse during mass flow of water of transpiration pull.

You might be interested in
What term is specific to reactions in which simple compounds are combined into more complex molecules?
iris [78.8K]
Anabolic is a chemical reaction that fuses molecules in the body, the process is called anabolism.  It is gathering of normally manufactured hormones that are subordinates of testosterone, are utilized therapeutically particularly to advance tissue development, and are once in a while manhandled by competitors to build the size and quality of their muscles and enhance continuance.
4 0
2 years ago
A gene that only influences the expression of a trait when paired with another less active gene is called _______.
Leto [7]
Dominant gene. <span>A dominant gene produces a dominant phenotype in individuals who have one copy of the allele, and it could come from one parent </span>
3 0
2 years ago
Read 2 more answers
Stem cells renew tissues but are all lost in childhood.a) trueb) false
ValentinkaMS [17]

Answer:

False

Explanation:

Stem cells are different type of cells in human body that can develop into different other body cells like muscles cells or brain cells and they gave the capability to renew themselves through mitotic cell division.

Stem cells are not lost in childhood but can be use to treat diseases or infection, it can be use to grow new cells and replace damaged body cells.

4 0
2 years ago
Which of the following is the best example of potential energy?
butalik [34]
It is C. a pitcher preparing a throw. Potential energy is essentially the potential for kinetic energy to happen. This is based on position and circumstance. A rounded up pitch has extremely high potential energy because it is about to be converted into a large amount of kinetic energy
7 0
2 years ago
This pie chart shows several ways that the United States made electricity in 2009. The chart shows that was the main source of e
damaskus [11]
1. Coal.
2. how much carbon dioxide is emitted by each source.
3. how to maximize the use of  clean sources of energy. 
<span />
6 0
2 years ago
Read 2 more answers
Other questions:
  • Students graphed the growth rate over several weeks of two plants in their classroom. The equations of both plants are given whe
    16·2 answers
  • Part a which of these phases encompasses all of the stages of mitosis but no other events?
    5·1 answer
  • What is the Krebs cycle?
    15·2 answers
  • In which group of children did scientists find results similar to those in harlow's monkey experiments?
    11·1 answer
  • There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern h
    5·1 answer
  • A biologist marked 200 mice, by putting leg bands on them, out of a forest containing an unknown number of mice. The marked mice
    13·1 answer
  • During the course of infection, Giardia will pass through many different anatomical locations. Each of these locations is associ
    6·2 answers
  • Consider the following data.
    11·2 answers
  • Vanessa is studying 6 species of butterflies, which she codes with the letters A to F. She constructs the cladogram, shown below
    12·1 answer
  • Although Burundi and U.A.E. have the same population of 9 million, why does Burundi have a smaller ecological impact?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!