Answer:
C.differences in food preferences between two populations of birds.
Explanation:
Reproductive isolation is a type of isolating mechanism which may further lead to speciation.
In this type of isolating mechanisms, the two types of organisms are isolated as they are unable to either mate or even if they mate, they fail to produce a viable progeny.
Reproductive isolation can occur due to :
1. Different mating strategies, time or place.
2. Inability to fertilize.
3.Production of a sterile or viable progeny.
Therefore, from the given option differences in food preferences is not a type of reproductive isolation as it does not follow any of the three listed mechanisms.
Reproductive isolation includes mechanisms that prevent different species from producing viable offspring. These can include behavioral, temporal, or biological factors. Differences in food preferences do not contribute to reproductive isolation.
In the context of evolution, reproductive isolation is a set of mechanisms, behaviours and physiological processes that prevent members of two different species that cross or mate from producing viable, fertile offspring. Examples include differences in behaviours like courtship songs, differences in breeding season timing, or incompatibility of gametes (like sperm and eggs) of two species.
Therefore, the choice C - differences in food preferences between two populations of birds is NOT an example of reproductive isolation. It's a ecological difference, not a barrier to mating or producing viable offspring.
#SPJ6
Answer:
Explanation:
{Auto-self, troph-food}
An autotroph is an organism that is able to produce its own food, which are usually complex organic substances from simple inorganic substances.
Unlike heterotrophs, they are not dependent on other organisms for their source of energy.
In the flow of energy in an ecosystem, they are commonly referred to as producers because other organisms, mostly animals are dependent on them for energy. This autotrophic ability is a characteristics of most plants, green algae and photosynthetic bacteria.
Autotrophs are in two category viz;
1. Photoautotrophs; which use light as a source of energy to power the synthesis of organic substances in a process called photosynthesis. These organisms possess pigments that makes them capable to capture the photons of light. Examples are green plants, green algae etc.
2. Chemoautotrophs, which use chemical inorganic compounds e.g Hydrogen sulfide, ammonia etc. as a source of energy to synthesize their food. Examples include archaebacteria
c. recession
b. external shocks
d. none of the above
Answer:
C. Recession
Explanation:
Edge 2021
(1) DNA in muscle cells
(2) base sequences in liver cells
(3) genes in an egg cell
(4) number of chromosomes in a fetal bone cell
B. ionic.
C. acidic.
D. basic.
Answer:
I think you're referring to pedigree symbols.
In pedigrees, males are represented by a square and females by a circle.
Explanation:
* Refer to the attached image.