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
musickatia [10]
3 years ago
14

An extra copy of chromosome 21 in humans causes

Biology
2 answers:
Charra [1.4K]3 years ago
4 0
Down syndrome is the result of an extra copy of chromosome 21 in a human.
jasenka [17]3 years ago
3 0

Answer:

Down syndrome is when there is an extra copy of chromosome 21

You might be interested in
Which of the following statements is FALSE regarding tRNA?
GuDViN [60]
It’s C. Amino acids bind to CCA3’OH end of tRNA via ester bond.
4 0
3 years ago
A typical leaf is flat and thin. Why is it useful for each leaf cell to be relatively near the surface of the leaf?
boyakko [2]
The outer layer of the skin covering the exterior body surface<span> of vertebrates ... the primary tissue of higher plants composed of </span>thin<span>-walled </span>cells<span> that remain capable of ... a swelling on a plant stem consisting of overlapping immature </span>leaves<span> or petals ... Older xylem </span>near<span> the center of a woody stem that no longer conducts water.</span>
3 0
3 years ago
A cell that contains organelles called chloroplasts
kupik [55]

Explanation:

<em>A</em><em> </em><em>cell</em><em> </em><em>that </em><em>contains </em><em>organelles</em><em> </em><em>called</em><em> </em><em>Chloroplasts</em><em> </em><em>could</em><em> </em><em>be</em><em> </em><em>found</em><em> </em><em>in </em><em>plants</em><em>.</em><em> </em>

<em>Chloroplasts </em><em>are</em><em> organelles that conduct photosynthesis, where the</em><em> </em><em>chlorop</em><em>h</em><em>y</em><em>l</em><em>l</em><em>(</em><em>green</em><em> </em><em>pigments</em><em> </em><em>found</em><em> </em><em>in </em><em>plant)</em><em> </em><em>captures</em><em> the energy from sunlight, converts it, and stores it</em><em>.</em><em>A chloroplast is a type of organelle known as a plastid</em><em>.</em><em> </em><em> </em>

4 0
3 years ago
In dry desert areas poor drainage can lead to a buildup of salt in water supplies. A student performed an investigation to study
saul85 [17]

Answer:

B. food production

Explanation:

In the example above described, salinity conditions (3%) completely prevented radicle development (0 mm). Salinity conditions may alter plant development by inhibiting the uptake of nitrogen, and by limiting water intake. Moreover, it has been shown that the excessive accumulation of chloride ions in plant cells may have toxic effects on plant growth, causing ionic stress and thus leading to nutrient deficiency.

7 0
2 years ago
What is mitosis and how does it affect change
Alina [70]
Mitosis is used to produce daughter cells that’s genetically identical to parent cells. And Mitosis affects change by the cell copying or “replicating” its chromosomes, and then splitting the copied chromosomes equally to make sure that each daughter cell has a full set.
8 0
3 years ago
Other questions:
  • Which reason best explains why carbon is able to form macromolecules
    11·1 answer
  • What part of a cell membrane is usually in contact with the interstitial fluid?
    9·1 answer
  • What are three examples of imprinting?
    7·1 answer
  • Which of the following best describes mechanical advantage? *
    8·1 answer
  • What is the term for a naturally occurring product that can be replaced naturally over time?
    6·1 answer
  • What is the three R's of conservation ??
    15·2 answers
  • Which of the following best describes a community?
    6·2 answers
  • ALL mutations have an effect on the protein. <br> A. True<br><br> B. False
    9·2 answers
  • The brain and spinal cord are parts of which body system?
    10·2 answers
  • . How can scientists tell which organisms are more closely related using DNA? <br><br> help asap
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!