Crossing over occurs at the four-strand stage when two homologous chromosomes, each consisting of a pair of sister chromatids, are paired. Each crossover involves just two of the four strands and generates two recombinant strands.
Hope this helps!
Globular clusters is a type of star system where the stars are tightly bounded by gravity.
<h3>What is a star system?</h3>
A star system can be defined as small number of stars that orbit around each other and are bound by gravitational force of attraction.
It is also called a stellar system.
Globular clusters is a type of star system with the following features;
- It is composed of hundreds or thousands of low-metal old stars.
- Stars are similar to those in the spiral galaxy
- Stars are tightly bound by gravity.
Hence, globular clusters is a type of star system.
Learn more about star system here:
brainly.com/question/26966644
#SPJ1
The observation that members of a population are uniformly distributed suggests that the members of the population are competing for access to a resource.
Option B is correct.
What is a resource ?
A resource is any physical material constituting a part of Earth that people need and value. Natural materials become resources when humans value them. The uses and values of resources change from culture to culture and from time to time. Resources are spatially distributed varying in quantity and quality.
Why the resources are important?
Resources are necessary for citizenry because of the following reasons: Resources when used as a raw material satisfy the needs and comforts of human beings. Natural resources are a source of agricultural activities which adds to the economic importance. They also provide employment opportunities.
Learn more about resource :
brainly.com/question/24514288
#SPJ4
First, tell your teacher that the Sun is not at the center of the UNIVERSE. He observatory that occasionally planets would travel backwards in the night sky & people also observed the moons rotating around Jupiter to prove his theory.
Answer:
Explanation:
Exons can be shuffled independently known as exon shuffling. It can be done in various ways, leading to infinite number of combinations to discover new and meaningful coding sequences hence various proteins. Due to exon shuffling, evolution need not occur only by the slow accumulation of point mutations but might also move ahead by “quantum leaps” with new proteins appearing in a single generation.
