Answer: crossing over, process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. Crossing over occurs in the first division of meiosis . At that stage each chromosome has replicated into two strands called sister chromatids.
The second stage of prenatal development begins at about two weeks after conception. at this point, the growing bundle of cells is called an embryo.
The answer is “Variation that decrease reproductive success are more likely to be passed on.”
Answer:
The correct option is a decomposers
Explanation:
Decomposers can be described as organisms which feed on dead and decaying material. These organisms break down molecules and use them as a source of food. Among the options mentioned, the option of decomposers is the only one which is applicable to fungus like protists and is unique to it. On the other hand, Plant like protists make their own food by the process of photosynthesis. Hence, option A is correct.
Mass movement, which is sometimes called <em>waste movement</em> or <em>slope movement, </em>is defined as the large movement of rock, soil and debris downward due to the force of gravity.
<h3>Factors affecting mass movement
</h3>
1. Slope
- Gravity provides the energy to move the materials.
- Rapid movements (e.g. landslide, slumping) etc.
2. Water
- Rainwater acts as a lubricant to weathered materials.
- Rainwater adds weight to weathered materials.
3. Rock structure
- Joints dipping downslope usually assists landslides, rockfalls, rockslide etc
4. Vegetation
- Lack of vegetation cover to hold the loose particles.
5. Vibrations
- Earthquakes.
- Construction processes and mining operations.
