Feel free to ask if you still don't understand
Answer:
Explanation:
A dominant trait is a genetic trait which will manifest when only one copy of the gene is present, overriding another inherited gene coding for a different version of the trait.eg Dark hair. Whilst recessive traits are being or produced by a form of a gene whose effect can be hidden by a dominant gene and which can produce a noticeable effect only when two copies of the gene are present Blue eye color is a recessive trait.
Answer and explanation;
-All lipids contain carbon, hydrogen, and oxygen. Some of them also contain nitrogen and phosphorus. The four main classes of lipids are fats, waxes, sterols, and phospholipids. Fats are triglycerides.
-The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes.
-Lipids are water-insoluble (hydrophobic), and this property is put to great use in the organisation of cells and tissues.
For example; phospholipids are a class of lipids that is amphipathic; that is it contains fatty acid tails that are hydrophobic, and a phosphate head that is hydrophilic. This means the phosphate group will orientate itself towards water and away from the rest of the molecule, and also gives rise to the special properties that allow phospholipids to be used to form membranes.
Answer:
It can lead to increased incidence of drug resistant bacteria.
Explanation:
Many farm animals used for meat are given antibiotics to promote their growth. They are also given these antibiotics to treat certain diseases caused by pathogenic microbes such as bacteria.
The continual use of antibiotics will however lead to increased incidence of drug resistant bacteria present in the world at large due to the exposure of the bacteria to these drugs resulting in the formation of resistant species of the bacteria with time .
Complete question:
An important challenge to traditional (pre-1860) ideas about species was the observation that seemingly dissimilar organisms, such as hummingbirds, humans, and whales, have similar skeletal structures. This most directly suggested to biologists that __________.
a) only the best-adapted organisms can survive
b) advantageous changes can be passed along to offspring
c) most evolution occurs rapidly following a mass extinction
d) dissimilar organisms might have evolved from a distant, common ancestor
e) all of the above
Answer:
d) dissimilar organisms might have evolved from a distant, common ancestor
Explanation:
Many dissimilar organisms, such as hummingbirds, humans, and whales share some structural similarities such as common basic skeletal structures present in their body parts. This led the scientist to conclude that organisms with several observable differences share common ancestors. This is why these dissimilar organisms have some similar homologous skeletal structures.
For example, the bones present in the forearms of humans and whales are the same irrespective of their different outer morphology. This suggests that humans and whales share common ancestors.
