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3 years ago

Help me yall im failing :)

Biology

1 answer:

olasank [31]3 years ago

8 0

Sequence for the movement of electrons during the light dependent reaction

Explanation:

1.These reactions occur within specialised membrane discs within the chloroplast called thylakoids and involve three steps: Excitation of photosystems by light energy. Production of ATP via an electron transport chain. Reduction of NADP+ and the photolysis of water.

2.The cyclic light-dependent reactions occur only when the sole photosystem being used is photosystem I. Photosystem I excites electrons which then cycle from the transport protein, ferredoxin (Fd), to the cytochrome complex, b6f, to another transport protein, plastocyanin (Pc), and back to photosystem

3.Light-dependent reaction. In photosynthesis, the light-dependent reaction uses light energy from the sun to split water (photolysis). ... Water, when broken, makes oxygen, hydrogen, and electrons. These electrons move through structures in chloroplasts and by chemiosmosis, make ATP

4.The two products of the light-dependent reactions of photosystem are ATP and NADPH. The movement of high energy electrons releases the free energy that is needed to produce these molecules. The ATP and NADPH are used in the light-independent reactions to make sugar.

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mihalych1998 [28]

Answer:

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3 years ago

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Animals with regulated body temperature are ___. A.mammals,B.homoiothermal,C.homoiothermals

Lelechka [254]

I believe the answer is B. Homoiothermal

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HELP ASAP!! Which atom is present in everything that is alive or ever was alive? Provide facts.

gregori [183]

Carbon is the atom, which is necessarily find in the living organism.

All the living organisms are made up of biomolecules. All the biomolecules are organic compounds. The substance cannot be consider as living, if it lacks nucleic acids. There are two types of nucleic acids DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), both have a structure made up of carbon rings and chains.

Other than nucleic acids, proteins, enzymes, hormones etc are also made up of carbon. So, all the living cells, or dead remain of organism must have carbon atom.

Hence, the correct answer is option D. carbon.

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3 years ago

What are the different structures and functions of roots?

seraphim [82]

Different structures and functions of roots

Explanation:

Roots are the underground descending non-green part of the plant.

Root functions: Anchorages the plant to the soil, absorbs water and nutrients from the soil.

Characteristics: Positively geotropic and hydrotropic, negatively phototropic; does not have nodes, internodes or stems.

Types:

Tap root
Adventitious root – fibrous, foliar and true adventitious roots

Structure and functions:

Root cap or Calyptra: Cap-like structure covering the root tip .

Function: protects the meristematic tissues of the root, secretes mucilage which enhances the root tips to grow into the hard soil.

Meristematic zone or growing point sub-terminal behind root cap. These cells are inverted and looks like a dome.

Function – helps in the root growth by adding new cells to the root tip and other basal regions

Zone of elongation behind the meristematic zone.

Function – helps in elongation of the root

Root hair zone: This is the zone of differentiation where cells differentiate into vascular tissues like phloem, xylem, endodermis, cortex etc.

The main function of root hair is to increase the total surface area of root to facilitate more absorption of water and other nutrients from the soil

Zone of maturation: the major and mature portion of a root.

Function - lateral roots originates from this zone and radial differentiation leads to secondary growth.

4 0

3 years ago

Mr. Duarte, now age 32, was diagnosed with diabetes mellitus when he was 14 years old. He takes insulin in the morning and the e

Alex777 [14]

Answer: Typed 2 diabetes; because plasma glucose molecules are retained in the blood and not able to enter the cells.

Explanation:

He suffered from type 2 diabetes because, the ketoacidosis was due to breakdown of fats in the liver due to low glucose in the cells, while the hypoglycemia was due to retention of plasma glucose in the blood instead of entering the cells.

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3 years ago