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lara31 [8.8K]
3 years ago
15

In most cases, the greatest vulnerability to teratogens occurs during the _____ period of prenatal development.

Biology
1 answer:
TEA [102]3 years ago
7 0
Teratogens is the right answer i believe<span />
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Hi! I am confused on how to do Q2. Anyone doing A-levels can solve that questions and explain? Thanks! &lt;3
riadik2000 [5.3K]

Answer:

i) Glucose

ii) β(1-4) glycosidic bonds.

iii) Oxygen

Explanation:

Cellulose is an important structural carbohydrate found in plants. It forms a major component of the plant cell wall.

Cellulose is a polysaccharide formed by monomers of glucose.  These glucose monomers are joined together by covalent bonds called β(1-4) glycosidic bonds, which means that the 1st carbon of one glucose is bound to the 4th carbon of the next glucose. To make this arrangement,  every other glucose molecule in cellulose is inverted, which you can see in the diagram.

Glucose monomers contain carbon, hydrogen, and oxygen only. If you look at the pattern of the molecule (remembering every second glucose is inverted), you can see that Z must be O.

The functional group denoted by Z is oxygen. The OH groups on the glucose from one cellulose chain form hydrogen bonds with oxygen atoms on the same or on another chain, holding the chains firmly together and forming very strong molecules - giving cellulose its strength.

4 0
3 years ago
When reading a recipe ingredients, which substance makes the recipe an unhealthy choice if it is present in a high amount?
DIA [1.3K]
Trans fats.
Unsaturated fat is GOOD fat, saturated fat is bad fat as well as trans fats.
6 0
4 years ago
What are the two ways that nitrogen can be removed from the atmosphere?
Anastaziya [24]
Mainly by nitrogen-fixing bacteria in the soil and oceans
4 0
3 years ago
If a blind person can't see how do they know what they are touching and do they know if the person they are talking to is a boy
kicyunya [14]

po dotyku i słuchu...

5 0
3 years ago
5. Mrs. Weasley has Type A blood but she is not sure if she is homozygous or
Stels [109]

Answer:

mrs weasley's genotype is  AA while Mr Weasley's genotype is AB

Explanation:

since the mating of Mr and Mrs Weasley results into = AA, AB, AA and AB

Mrs Weasley has homozygous type A blood while her husband Mr Weasley has heterozygous type A blood as well

3 0
3 years ago
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