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shepuryov [24]
3 years ago
8

The head makes up the largest percentage of body size _____ weeks after fertilization.

Biology
1 answer:
mariarad [96]3 years ago
4 0
The answer is 38 weeks which is D
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The extracellular matrix (ECM) was regarded decades ago as an uninteresting set of proteins and unusual carbohydrates that were
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(a) E-cadherin growth suppressor genetic factor are significantly active space of analysis in growth and tumorigenesis. The calcium reliant connections between E-cadherin particles are essential for the creation and conservation of supporter connections in parts of animal tissue cell-cell interaction.

CAMs admire the cadherin glycoproteins ordinarily perform because the adhesive that grips cells along and performance as necessary intermediaries of cell to cell connections. E-cadherins, on the superficial of all animal tissue cells, are joined to the simple protein bodily structure complete connections with catenin’s within the protoplasm

(b) scleroprotein synthesis is exclusive assumed its closing gathering phase. justify this declaration. The last part originates from the establishment of precise amino acids admire Glycine, aminoalkanoic acid and Hydroxproline. scleroprotein additionally has 2 unusual spinoff amino acids that don't seem to be straight introduced throughout translation.

Collagen consists of three handcuffs. The manacles are looped along to create a multiple helix. the method of scleroprotein synthesis happens principally within the cells of fibroblasts that are specialised cells with the most perform of manufacturing collagen and stroma. scleroprotein mixture happens each intracellularly and extracellularly.

 

c. Laminin could be a substance of integrin’s receptors. it's AN RGD theme that dilemmas to RGD compulsory sphere on receptor. So as to investigate whether or not the somatic cell composition is because of compulsory of laminin to integrin’s, ab initio it's to be verified, that integrin’s are profusely articulated on the somatic cell semipermeable membrane. This may be achieved mistreatment technique examination via antibodies or by template RNA appearance by RT-PCR.

The appearance of those integrin’s may be inhibited mistreatment RNAi by siRNA method. The siRNA can destroy the template RNA for the integrin because it contains a balancing arrangement to the mRNA. The damage of template RNA can source decreased macromolecule appearance. The cells will then be coated on the 3 glazed plates makeshift, laminin. If the cells provide spherical cells, formerly the somatic cell composition are going to be because of integrin-laminin collaboration. The cells may be gathered and testes for somatic cell indicators that designated distinction to neuronal composition. If no diversity indicators are specificed in laminin covered plates with distorted cells as likened to the management cells that rapid integrin’s, then it's laminin integrin communication that's chargeable for the somatic cell composition see, simple protein thread designs can even be deliberate on top of things and distorted cells produce on laminin covered plates by technique.

Another technique which will be utilized is to pelt the philosophy plate with changed laminin macromolecule that absences the RGD themes. The somatic cell cell appearances will then be plated and refined on the management laminin and changed laminin missing RFD themes. If the somatic cell composition isn't ascertained, then it may be over that laminin-integrin connections are concerned in growth of the somatic cell composition.

(d) Glycosaminoglycans (GAGs) are necessary electronic warfare parts, as a result of they're extremely charged polymers that powerfully dilemma aquatic and ions, making state in electronic warfare areas, and since they dilemma and confiscate physiologically necessary proteins.

Proteoglycans facilitate control trails that management vegetative cell fate, and so represent a wonderful tool to control these trails. Although their position, there's a scarcity of knowledge linking glycosaminoglycan construction inside proteoglycans with vegetative cell variation.

7 0
3 years ago
The genetic code for one amino acid molecule consists of A) five sugar molecules B) two phosphates C) three nucleotides D) four
Harlamova29_29 [7]

Answer:

c

Explanation:

3 0
3 years ago
The products of one reaction may be the reactants in another.<br><br> True <br> False
lidiya [134]

Answer:

True. This is true for photosynthesis and respiration.

8 0
3 years ago
Select all that apply. The first step of cellular respiration involves _____.
Lubov Fominskaja [6]

The first step of cellular respiration takes place in cytoplasm of the cell called glycolysis. Cellular respiration is an aerobic process that requires oxygen and gives off carbon dioxide and it usually involves the complete breakdown of a glucose molecule with the use of oxygen molecule and then produces a net gain of 2 ATP's.

3 0
3 years ago
Read 2 more answers
Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have overlapping ranges. Pollen grains (whi
jarptica [38.1K]

Answer:

The correct answer is: Yes, this is an example of Reproductive Isolation.

Explanation:

  • Reproductive Isolation can be defined as the mechanism adopted by different species during the course of their evolution, due to which the individuals belonging to different species are incapable of mating with each other and producing viable offspring.
  • The given question is an example of Mechanical, Pre-zygotic Reproductive Isolation.
  • Prezygotic Isolation refers to the mechanism adopted by individuals of different species during the course of evolution such that successful fertilisation of gametes from individuals of different species never occur, hence a viable zygote is never formed.
  • Mechanical Isolation refers to the mechanism adopted by individuals of  different species during the course of evolution such that their reproductive organs or the organs that assist in the process of reproduction are incompatible to each other. Hence, the gametes of each species are unable to come in vicinity of each other.
  • Here, the pollen grain from the flower of one species of juniper is unable to form the pollen tube when its sits on the stigma of the flower of another species of juniper. This is an example of Mechanical Isolation.
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4 years ago
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