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3 years ago

According to the pedigree chart, which statement MUST be true?

Biology

2 answers:

Pavel [41]3 years ago

8 0

Answer:

B, The mother in the original parental generation is a carrier for the disease.

Crank3 years ago

6 0

Answer:

Explanation:

This is because the original male is not affected by the disease. In the second generation they have a female child who is a carrier of the disease because she passes it down to her son, but she is not affected. Seeing how all males that carried the disease were affected at some point the disease must lay dormant in female carriers but not males. This means the original father cannot be a carrier of the disease. Hope this helps!

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It is the chance or probability that a person will harmed or experience an adverse health , effect if one is exposed to hazard

vampirchik [111]

Answer:

D. Risk

Explanation:

RISK can be seen as a tendency or likelihood that a person or an individual may encounter, faced or be exposed to something that may be harmful or have an adverse health effect on such person Example a house that has a foundation that is not strong is an hazard reason been that their is likelihood or tendency that a person or an individual might be harmed if the house collapsed because the foundation of the building is not strong for the building to stand long on it without collapsing.

5 0

3 years ago

A cell membrane is ___________, because it regulates what materials enter the cell.

vesna_86 [32]

A cell membrane is c.selectively permeable because it regulates what materials enter the cell.

8 0

2 years ago

The correct sequence of events occurring during transcription is

marin [14]

Firstly, the enzyme, DNA Helicase breaks the Hydrogen bonds between a specific region of the DNA molecule and unwinds the duplex DNA molecule at the targeted gene sequence site.
Then, RNA Polymerase binds at the 3` site of the gene sequence of the sense/coding strand(only one strand) that acts as the template for mRNA synthesis. RNA Polymerase then matches free nucleotides by complementary base-pairing(A-U & C=G), working in the 5`to3` direction. Hydrogen bonds then form between the complementary bases, holding the nucleotides in place. Each free adjacent nucleotide is joined at 3` ends by Condensation reactions with the other to form Phosphodiester bonds.
Once the mRNA molecule is formed, it is separated from the synthesis complex and leaves the nucleus through pores in the nuclear envelope to moves towards ribosomes for Translation.
Lastly, the DNA double helix rewinds by forming Hydrogen Bonds.

6 0

3 years ago

Which would be an adaptation for living in the tundra

Slav-nsk [51]

Answer:

b. hibernation to lower metabolism in the winter

Explanation:

Tundra, besides the one I live in apparently, are very, very dry because of the cold. This means that it may be helpful to hibernate for the part of the year where it is even too cold for plants and other animals.

6 0

3 years ago

Biology Photosynthesis questions

Mazyrski [523]

I cannot do the part A task...... I can do the chart (: annddd the questions below..

Glucose: Glucose is a sugar made from sunlight, with the molecular formula C6H12O6.

chloryphll: The energy that is absorbed of the photon is transferred to an electron in a process called charge separation.

ATP: is a product of the first stage of photosynthesis, and it provides energy for the second stage. energy transfer; that is, ATP is able to store and transport chemical energy within cells.

Carbon dioxide: is involved in the production of refrigeration systems, welding systems, water treatment processes

chloroplast: contains the molecule chlorophyll, which absorbs sunlight for photosynthesis.

stomoata: control the flow of gases in and out of leaves.

Thylakoid: A thylakoid is a membrane-bound compartment inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. surrounded by a lunon.

stroma; involved in the Calvin Cycle – carbon fixation, reduction and regeneration. the stroma the supportive tissue of an epithelial organ, tumor, gonad, etc.

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Q2: oxygenic photosynthesis and anoxygenic photosynthesis.

Q3: The general principles of anoxygenic and oxygenic photosynthesis are very similar, but oxygenic photosynthesis is the most common and is seen in plants, algae and cyanobacteria.

Q4: water, light and carbon dioxide, while the products are oxygen and sugars.

Q5: carbon dioxide + electron donor + light energy ==> carbohydrate + oxidized electron donor + water

CO2 + 2H2A + photons ==> [CH2O] + 2A + H2O

7 0

3 years ago