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ss7ja [257]
3 years ago
13

HELP PLEASE

Biology
1 answer:
Ostrovityanka [42]3 years ago
4 0
1. Mattias Schleiden
2. Robert Hooke
3. Microscope
4. Cell membrane
5. Nucleus
6. Nuclei
7. Nuclear membrane
8. Endoplasmic Reticulum
9. Ribosomes
10. Endoplasmic Reticulum
11. Lysosome
12. Vacuole
13. The Cell Wall- provides the plant structure
Chloroplasts- preform photosynthesis
Larger Vacuole- holds excess water for the plant to use later
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A developer wants to turn part of a local woodlot into a new housing development. A vernal pool exists in the part of the woodlo
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The developer's plan would affect the salamanders that live in the woodlot by taking away their vernal pool, the lack of a vernal pool would mean that the salamanders would have no place to mate and lay their eggs. This would result in a drastic reduction of salamanders in the area. 
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3 years ago
Which group began farming and living in villages? selected:
GuDViN [60]

It is estimated that the agriculture was invented 10000 to 12000 year ago. At this period of time, the modern humans or the <em>Homo sapiens</em> were spread to America.

The <em>Homo sapiens</em> begin to form villages and started domesticating animals. Also, all other ancestors of humans were possibly dead up to this period. The agriculture developments and advancements occurred after 10000 year ago.

Hence, the correct answer is <em>Homo sapiens. </em>

7 0
3 years ago
The main difference between the four nucleotides that make up DNA is that they have differentRequired to answer. Single choice.
pickupchik [31]

Answer:

bases.

Explanation:

Nucleotides are the basic building blocks that make up DNA, consisting of a deoxyribose sugar, phosphate group, and nitrogenous base. The main difference between the four nucleotides is the nitrogenous base, Adenine, Thymine, Guanine, or Cytosine. Adenine pairs with Thymine, and Guanine pairs with Cytosine. The order in which these pairs come in code for proteins and hold genetic information.

3 0
3 years ago
The thermic effect of food ______________
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Included in the measurement of basal metabolism.
8 0
3 years ago
A mutation in a G-protein prevents the alpha-subunit from dissociating from the beta/gamma-subunit. What effect will this have o
Ymorist [56]

Answer:

the pathway will be under-expressed.

  • the alpha subunit helps to bind with either GDP or GTP. when the α subunit is bound with GDP, it will be bound to β and γ subunits and thus forms an inactive state for G-protein.
  • when the alpha subunit binds with the GTP, it becomes activated and dissociates β and γ subunits.

if G-protein Coupled Receptor is unable from dissociating β and γ subunits, then the pathway will go under expression.  

The chemical qualities of the alpha subunit allow it to bind easily to one of two guanine subunits, GDP or GTP. The protein thus has two functional formations. When GDP is bound to the alpha subunit, the alpha subunit remains bound to the beta-gamma subunit to form an inactive trimeric protein.

G-proteins, cAMP, and Ion Channel Opening. The alpha subunit activates adenylate cyclase, in purple, and loses GTP. Adenylate cyclase converts ATP to cyclic AMP, which then activates Protein Kinase, shown in blue. Protein Kinase phosphorylates an ion channel, letting sodium ions rush into the cell.

As a result of the ligand binding to its site on the G-protein-linked receptor, A) the G-protein changes conformation and GTP replaces the GDP on the alpha subunit. ... Inactivation of the alpha subunit occurs when its own phosphorylase activity removes a phosphate from the GTP.

8 0
2 years ago
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