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sergeinik [125]
3 years ago
12

A scientist tries to mate the two similar-looking fruit flies Drosophila melanogaster and Drosophila simulans. But he finds that

they are unable to produce viable offspring.What kind of evolutionary barrier could this be?
Biology
1 answer:
wel3 years ago
6 0
The evolutionary barrier is Reproductive Isolation. This mechanism ensures that organisms of different species can not produce offspring. In some cases, such as Mules, the two organisms CAN produce offspring, but the offspring will not be fertile. 
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1 pts
erica [24]

Answer:

The Calvin cycle is a process that plants and algae use to turn carbon dioxide from the air into sugar, the food autotrophs need to grow.

Every living thing on Earth depends on the Calvin cycle. Plants depend on the Calvin cycle for energy and food. Other organisms, including herbivores, also depend on it indirectly because they depend on plants for food. Even organisms that eat other organisms, such as carnivores, depend on the Calvin cycle. Without it, they wouldn't have the food, energy, and nutrients they need to survive.

The Calvin cycle has four main steps: carbon fixation, reduction phase, carbohydrate formation, and regeneration phase. Energy to fuel chemical reactions in this sugar-generating process is provided by ATP and NADPH, chemical compounds which contain the energy plants have captured from sunlight.

Explanation:

7 0
3 years ago
A bird that can easily out complete other birds for its food and that can produce many eggs has high what?
love history [14]

Answer:

Fitness or aptitude

Explanation:

Aptitude (or fitness) is the genotype/phenotype that results in the survival, fertility, and capability of having a mate. It is a way of measuring the individual ability to leave fertile offspring.

Aptitude puts together everything that matters in natural selection. Includes the survival capability, finding a mate partner possibility, producing fertile descendants, and leaving the genes to the next generation. The aptitude of a genotype must be significant for natural selection to act in its favor.

3 0
3 years ago
In which position are the earth, moon, and sun during a new moon?
dimaraw [331]

Answer:

A. Moon is between the Sun and Earth

Explanation:

The new moon stage is the faze in which we can not see the Moon from Earth. In this stage, the Moon is lacking from the sky, or rather we can not see it because it is totally dark from the side that is facing the Earth. The reason for this is that the Moon is located between the Sun and the Earth. The Sun is making half of the Moon bright as it always does, but in this stage it is the half of the Moon that is facing the Sun, while the other half that is facing the Earth is totally dark as it doesn't receive any sunlight at that time.

8 0
3 years ago
Single maploid cell (with genetic normation from only one parend surrounded<br> hard outer wall
Misha Larkins [42]

Answer:  spore a single haploid cell (with genetic information from only one parent surrounded by a hard, outer wall.

Explanation:

3 0
3 years ago
Progressive changes in fossils of different ages provides one of the strongest lines of evidence for
kykrilka [37]
Are there any options you can provide?
3 0
3 years ago
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