Protozoans are single celled eukaryotes that exhibit plant and animal like features. Some of the examples of protozoans are - Euglena, Paramoecium and Amoeba. To observe these organisms under the microscope, a small amount of it from the culture jar is taken and observed at different magnification. Euglena moves with the help of a flagella and hence, is classified as flagellate. Paramoecium moves with the help of cilia and hence, classified into ciliate. Amoeba moves with the help of pseudopodia and thus, it is a sarcodine.
All the three organism has nuclei. However, paramecium have two nuclei called as a micronucleus and macronucleus. Euglena lacks food and contractile vacuole. Euglena also has an organelle called as chloroplast which is found mostly in plants.
Considering an X-linked dominant trait, if an unaffected woman and an affected man decide to have children, which of the following statements is TRUE about the possibilities for their children?
a. Their sons are expected to be heterozygous for the associated gene.
b.Their daughters are expected to be heterozygous for the associated gene.
c. All their children, whether male or female, are expected to show the dominant trait.
d. All of their sons are expected to show the dominant trait.
e. Their daughters are not expected to show the dominant trait.
Answer: B - Their daughters are expected to be heterozygous for the associated gene.
Explanation: In X - linked dominant trait,
1. Both males and females are affected; often more females than males are affected.
2. Affected fathers will pass the trait on to all their daughters.
3. Affected sons must have an affected mother.
4. Affected daughters must have either an affected mother or an affected father.
5. Affected mothers (if heterozygous) will pass the trait to ½ of their sons and ½ of their daughters.
Check the attached image to see the illustration of how an X - linked trait can be passed from an affected father and unaffected mother to their offspring.
In the 1800s the most widely favored explanation of genetics was "blending." Explain the concept of blending, and then describe how Mendel’s "particulate" (gene) hypothesis was different.
I need the answer to!!!
Help!! I'm stuck on this....
Suppose a stream has a low volume but a steep gradient. How might the
stream change the land? Provide your reasoning.
Answer:
The steep gradient causes the erosion of soil.
Explanation:
Steep gradient is the slope of the land where the stream is present or any flow of runoffs.As the slope of stream flowing increases, the velocity of water also increases causing the erosion of soil.It causes the land to get deformed by the sweeping of soil making difficult for plants and grasses.The steep gradient runoffs negatively impacts the aquatic living thing.A low-volume stream with a steep gradient can change the landscape through erosion and sediment transport, forming features such as gorges, ravines, and river terraces over time.
Explanation:Even a stream with a low volume but a steep gradient can significantly change the land. The steep gradient means the stream flows rapidly, creating a powerful force that can erode soil and rocks, transporting them downstream. This process can form features such as gorges and ravines.
Over time, this constant erosion and sediment transport can remodel the landscape, deepening valleys and altering the course of the stream. On a smaller scale, it may also create river terraces, which are flat areas alongside the stream where sediments accumulate.
Learn more about Erosion and Sediment Transport here:https://brainly.com/question/32312372
#SPJ3