crossing over occurs during the prophase I of meiosis, where homologous chromosomes pair up and exchange segments, contributing to genetic diversity in offspring.
The stage in meiosis where crossing over occurs is the prophase I. During this phase, the proteins associated with homologous chromosomes bring the pair close to each other, a process called synapsis.
The genes on the chromatids of the homologous chromosomes precisely align with each other, initiating an exchange of chromosome segments between non-sister homologous chromatids.
This exchange is known as crossing over, contributing greatly to genetic variation among organisms.
Following this process, the homologous chromosomes separate and distinct combinations of maternal and paternal chromosomes make their way into the gametes.
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The right answer is B
The development towards 1.4 Ga of eukaryotes, aerobic organisms such as unicellular algae, will be decisive for the oxygenation of the Earth's atmosphere.
The first multicellular organism is a red alga dating back to 1200 Ma during the Mesoproterozoic era (part of Precambrians). Various forms of life with soft bodies dated between 600 and 541 Ma constitute what is called the Vendian fauna, that is to say the fauna of the Ediacarien.
The appearance of a great diversity of small shelly fauna from 541 Ma will mark what is called the Cambrian explosion.
The advantage does this have over other alternative biofuels is multiple processing steps can be avoided.
Cyanodiesel is derived from one of the oldest living elements in nature, cyanobacteria. They have unlimited development potential and are a microbial element of diverse biotechnological applications.
Cyanobacteria have benefits for nature and for humans, such as:
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facilitated transport
ionic pump mechanisms
i'd say during facilitated diffusion this happens but it's not an option so i'd have to say facilitated transport then, i hope i'm right and i hope this helps!! :)
Deep Ocean Trenches
Mountains
Volcanic Island Arcs
New Ocean Floor
Answer:
Deep Ocean Trenches, Volcanic Island Arcs and mountains
Explanation:
At a convergent plate boundary two plates collides with one another. Based on the type of plate, different features can form at such a margin.
B) dissecting microscope
C) Scanning electron microscope
D) transmission electron microscope
Answer;
C) Scanning electron microscope
Explanation;
-A Scanning Electron Microscope (SEM) is a powerful magnification tool that utilizes focused beams of electrons to obtain information.
-A scanning electron microscope (SEM) scans a focused electron beam over a surface to create an image. The electrons in the beam interact with the sample, producing various signals that can be used to obtain information about the surface topography and composition.
-Advantages of a Scanning Electron Microscope include its wide-array of applications, the detailed three-dimensional and topographical imaging and the versatile information garnered from different detectors.
Answer:
C) Scanning electron microscope
Explanation:
Scanning electron microscope - It uses a focused beam of the electron over a surface to form an image electron that interacts with the atom present in the sample and it produces various signals that are used derive information from the composition and details structure of protein molecule.
Pesticide use is harmful to human agriculture because it contains an antifreezing chemical (present in transportation vehicles). When the chemical seeps into the leaves of the plant, it is distributed all over its body and remains there. The chemical may still be present there when we are going to the plant.
Answer:
its A
Explanation:
only promote pesticide use in rural environments