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svp [43]
3 years ago
5

A factor that increases the probability of having a baby with down syndrome is:

Biology
2 answers:
natulia [17]3 years ago
8 0
A factor that increases is when the mother uses drugs and/or alcohol.
Wewaii [24]3 years ago
6 0

when the mother is older and near or in menopause

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How can a molecule that contains an atom of phosphorus be made radioactive using an unstable isotope?
AVprozaik [17]

Answer:

A radioactive (unstable) phosphorus isotope is made to replace a nonradioactive isotope of phosphorus in the molecule

Explanation:

Phosphorus has both unstable (radioactive) and stable isotopes. In any compound that contains phosphorus, the phosphorus atom present may be either a stable isotope of phosphorus or an unstable isotope of phosphorus.

However, if the molecule contains a stable nonradioactive isotope of phosphorus, it is possible to convert this isotope in the molecule to the unstable radioactive isotope by carefully carrying out exchange reactions in which the phosphorus isotope replaces the nonradioactive isotope in the molecule.

This is usually done in order to create radioactive tracers which are used to study chemical reactions and biochemical processes.

3 0
3 years ago
The role or way of life of a species within a community is its
sergejj [24]

The answer to this Question is

3. Habitat.


Hope This Helps!

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8 0
3 years ago
Can you identify the type of root by only looking at the structure of the leaf explain â
Blababa [14]

Answer:

Simple answer, yes.

Explanation:

Monocots have isobilateral leaf I.e both sides of the leaf are equally exposed to the sun.

Dicots have dorsiventral leaf I.e. ventral side is exposed to the sun more than the dorsal side.

They are very distinctly different from each other and can be separated easily, and so are their roots.

4 0
3 years ago
Modeling the Calvin Cycle Exploration
galina1969 [7]

Explanation:

The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.

6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Further Explanation:

Photosynthesis is a chemical pathway, integral to plant and other primary producers producing energy. Energy is produced from light, water and carbon dioxide in the form of glucose molecules while the oxygen is emitted.

Photosynthesis, which occurs in several complex steps, is a rate-limited reaction, depends on several factors including concentration of carbon dioxide, ambient temperature, and light intensity; energy is recovered from photons, i.e. light particles, and water is used as a reducer. For those removed from photosystem II, water supplies the chlorophyll in plant cell with replacement electrons.

Therefore, water (H2O) split into H+ a by light during photolysis into H+ and OH-acts as a source of oxygen along with functioning as a reducing agent; it reduces the molecule NADP to NADPH by providing H+ ionsand produces molecules of the energy storage moleciule ATP through an electron transport chain. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

Later, in dark reactions, NADP and NADPH are used in the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules. These hold energy in their bonds, which can be released in respiration in the mitochondria.

Glucose production occurs after G3P production- a molecule of G3P, goes to the cytoplasm from the cycle, to form complex molecules and simple sugars like glucose.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

 

5 0
3 years ago
How can the carbon stored in plants reach the atmosphere?
Gre4nikov [31]
I believe the answer to this question is cellular respiration
6 0
4 years ago
Read 2 more answers
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