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Fudgin [204]
3 years ago
12

What is the complementary strand of nitrogenous bases, sugar-phosphate backbone, and the double helix shape.

Biology
1 answer:
erik [133]3 years ago
6 0

Answer:

DNA

Explanation:

DNA  is composed of two complementary strands oriented antiparallel to each other with the phosphodiester backbones on the exterior of the molecule. The nitrogenous bases of each strand face each other and complementary bases hydrogen bond to each other, stabilizing the double helix.

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The ____ phylum of seedless vascular plants has about 1000 known living species, including those in the genera
dalvyx [7]

Answer:

D)Lycophyta

Explanation:

The seedless vascular plants or the pteridophyte forms one phylum of the plant kingdom.  The pteridophyte kingdom can be classified into three groups: the Sphenophytes, the pteridophytes and the Lycophytes.

The Lycophyte group contains about 1000 living species as it is the most primitive group of vascular plants. The species is characterised by the presence of the microphyll like the Selaginella and Lycopodium.

The rhizoids of the gametophyte of these plants form the mycorrhizal association with the fungi.

Thus, Option-D is the correct answer.

3 0
3 years ago
Read 2 more answers
Three generations of a family afflicted with hemophilia are illustrated in the pedigree chart family members used the pedigree c
nasty-shy [4]
For the given situation above, I'm afraid I cannot answer your question since a pedigree chart isn't provided along with the question. You can resubmit your question together with the chart and we'll analyze it. Thank you for posting though. Here is what pedigree analysis is about.

Scientists have devised an approach, called pedigree analysis<span>, to study the inheritance of genes in humans. Pedigree analysis is also useful when studying any population when progeny data from several generations is limited. Pedigree analysis is also useful when studying species with a long generation time.</span>
4 0
3 years ago
Read 2 more answers
Give the definition of parasympathetic nervous system?
SashulF [63]

Answer: Autonomic nervous system is made up of 3 divisions; Sympathetic nervous system, parasympathetic nervous system and sympathetic division. All these divisions are involuntary actions where parasympathetic is ultimately responsible for the "rest and digest" part of it. When the body is at rest the parasympathetic nervous system inhibits or lowers high energy requiring bodily functions.

This nervous system will lower any fight or flight response actions such as the release of epinephrine into the blood and enable digestion, urination and defeacation. When engaged in digestion you feel relaxed and at rest, this is solely due to the parasympathetic nevous system.

6 0
3 years ago
Which statement is not part of the cell thoory?
Vsevolod [243]

Answer:

c

Explanation:

all cells do not have an nucleus

5 0
3 years ago
If the researchers replaced the bacterial proton pump with a proton pump that was activated only by atp, what result would you p
AnnyKZ [126]

If the researchers replaced the bacterial proton pump with a proton pump that was activated only by atp then less ATP would be produced when the light is on because no proton gradient would be available to produce ATP.

<h3>What is proton gradient ?</h3>

Two quinol (4H+4e) oxidations at the Qo site result in the formation of one quinol (2H+2e) at the Qi site, creating a proton gradient (in total six protons are translocated: two protons reduce quinone to quinol and four protons are released from two ubiquinol molecules).

For the ETC to continue functioning, the energy trapped in the electrochemical gradient of protons across the inner mitochondrial membrane must also be released in some manner. ATP is created using the energy in the proton electrochemical gradient.

Chemiosmotic coupling is the process by which ATP synthesis is coupled to the electrochemical gradient of H+ across the inner mitochondrial membrane.

Peter Mitchell, who in 1961 made the initial suggestion, was given the Nobel Prize for his efforts in 1978.

To learn more about proton gradient from the given link:

brainly.com/question/28046848

#SPJ4

4 0
1 year ago
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