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Liula [17]
2 years ago
7

What was unusual about Tribrachidum?

Biology
1 answer:
saveliy_v [14]2 years ago
3 0
Tribrachidium was originally described by Martin Glaessner as a problematic organism, one that is excluded from all known major groups of animals by its tri-radial symmetry. ... Tribrachidium was a soft-bodied benthic organism that temporarily attached (but did not accrete) to the substrate of its habitat (microbial mats).
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Steroid hormones bind to receptors in the nucleus of their target cells. cannot diffuse through cell membranes. remain in circul
goldfiish [28.3K]

Answer:

The correct answer is - bind to receptors in the nucleus of the target cells.

Explanation:

Steroid hormones are the chemical compounds that are a member of the class of steroids and act as hormones. These hormones are released by the adrenal cortex, testes and ovaries in the body placenta also release steroid hormone during pregnancy.

The steroid hormones do not bind to the plasma membrane of the target cell but binds to the receptors present on the nucleus of the cell. These cells pass through the cell and reach the nucleus and bind to it or gene to produce proteins for the biological process.

Thus, the correct answer is - bind to receptors in the nucleus of the target cells.

6 0
3 years ago
Which are examples of convention currents
xz_007 [3.2K]
Warm air raising toward the ceiling or attic of a house warm air is less dense than cool air.
Wind is an example of a convention current sunlight or reflected light radiates heat.
3 0
3 years ago
Which type of bond forms between two water molecules?
Vlad [161]
The type of bond that forms between two water molecules is Hydrogen Bond
6 0
2 years ago
Which of the following would have an effect on an object's weight?
dybincka [34]
I'm guessing changing gravity
8 0
3 years ago
Read 2 more answers
A Paramecium has an internal sucrose concentration of 0.040 M, a glucose concentration of 0.035 M, and a fructose concentration
Nadusha1986 [10]

Answer:

<u>c. Sucrose and glucose</u>

Explanation:

The paramecium is a large, single-celled microbes, surrounded by a plasma membrane. Simple diffusion occurs in cells across plasma membranes, as a form of passive transport. In diffusion, solutes move from regions of high concentration to regions of low concentration across the plasma membrane.

Here, the internal environment has higher concentrations of sucrose and glucose, but lower concentrations of fructose, thus the solutes will move along their concentration gradient, to where the concentrations are lower. In order for the fructose molecules to move out of the cell, the molecules have to move against their concentration gradient - a process requiring energy known as active transport.  

6 0
3 years ago
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