Answer:
Because they do not live in the extreme environments.
Explanation:
Cell membrane has a vital role in separating the external environment of cell from its external environment. Just like eukaryotic cell, cell membrane of bacteria is also composed of proteins and lipids (phospholipids).
If we compare the structure of ancient bacteria's and modern bacteria's cell membrane then we notice that in archaebacteria or ancient bacteria the phospholipids of cell membrane are linked with ether (means they have glycerol backbones). whereas in modern bacteria they are linked through ester linkages.
So, the stronger glycerol backbones give the archaebacteria more stable cell membranes through which they are able to resist harsh environmental stresses like salt lakes, volcanic stress, boiling mud and hot springs. As modern bacteria do not always have to live under such stresses thats why they donot have ether-linked cell membrane.
Hope it helps!
<u>Answer</u>:
The proliferation of angiosperms is because they are Adaptable.
<u>Explanation</u>:
Angiosperms are those produces the gametes in the separate organs, those are present inside the flower. The embryo development and fertilisation takes place inside the anatomical structure, which provides a stable system of in sexual reproduction which will be sheltered from environmental fluctuation. For the example of co-evolution relationship between pollinator and flower characteristic will be considered. Most of them are mutualistic pollinator, having distinct features.
Answer:
d. and e. I believe would be the correct answer
Answer:
1.
Explanation:
A signal from one gland to another would not be intercellular, as "inter" means inside. This means intercellular would stand for "Inside the Cell"
I think I understand even without the picture. I'll add a picture of the Punnett Square filled in, but what you're crossing is
Tt x tt (heterozygous crossed with a homozygous recessive)
The ratio you get in the end is 2 heterozygous (Tt) and 2 homozygous (tt) offspring, so the ratio is 1:1.
So the percentage of offspring that are homozygous recessive is 50%.
