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Furkat [3]
3 years ago
9

The placenta develops from the outer cells of the

Biology
1 answer:
statuscvo [17]3 years ago
4 0
<span>blastocyst The outer layers of the blastocyst turn in to the trophoblast after implantation. The trophoblast forms the placenta.</span>
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The portion of the dna double helix requiring the least energy input to form the bond is the.
WARRIOR [948]
The answer is hydrogen bond between the complementary strands.
6 0
1 year ago
_________ cells must be in osmotic equilibrium with their surrounding environments, because if they swell or shrink their membra
dlinn [17]
Well I'm not exactly certain where the teacher is going with this, but an often used example is red blood cells (RBCs) aka: erythrocytes.
RBCs are suspended in blood plasma as they flood through vessels around and around the body, so the osmolarity (amount of small particles that affect osmosis) must remain relatively constant. This is termed "isotonic", meaning the same amount of osmosis-influencing particles that are there inside the RBCs' cytosol, within their plasma membranes.
If the plasma osmolarity get too high, called hypertonic (as with extra salt particles) then water inside the RBCs will have an osmotic force driving it out of the cells' membranes, to flow where there are more salt particles. This will lead to cell shrinkage (called "crenation").
Counter to that, if the plasma osmolarity gets too low, as due to low plasma salt with excessive water intake (for example from the condition "water intoxication"), then the plasma will be hypotonic with respect to the intracellular cytosol concentration. This can result in water rushing into the RBCs' membranes via osmosis, causing the cells to swell from discs into spheres (balls), or even rupture and burst (a phenomenon called "hemolysis").

HOPE THOSE EXAMPLES HELP!!
3 0
3 years ago
Read 2 more answers
In cell membranes with aquaporins can water move across the membrane?
stiks02 [169]

Answer: The cell membranes of a variety of different bacteria, fungi, animal and plant cells contain aquaporins through which water can flow more rapidly into and out of the cell than by diffusing through the phospholipid bilayer.

Explanation:

please always check over answers and hope this helps!!!

5 0
1 year ago
The diagram shown represents a pair of homologous autosomes. The letters B and b represents genes for a certain trait. These let
Vesna [10]

Answer:

A

Explanation:

The two genes are B and b are located in the same spot, therefore they are alleles or alternative forms of the same gene.

8 0
2 years ago
Next, you explored mutations by transcribing and translating mutated versions of that original gene. When you transcribed and tr
umka2103 [35]

Answer: hello some details relating to your question is missing below is the missing detail

DNA Sequence= 3’ - TACTAGTTGTGCATT - 5’

Complementary Sequence=5`-ATGATCAACACGTAA-3`

Answer : MINT

Explanation:

The protein ( sequence of amino acids ) that resulted from your Translation is MINT

The m-RNA Produced form the information above is:

 5`-AUGAUCAACACGUAA-3`

While the Protein Sequence is Met-Ile-Asn-Thr which can be written as MINT

7 0
3 years ago
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