Rose pollen is large and sticky in comparison to grass pollen as it has to stick to insects to cross pollenate! Grass pollen is produced in larger quantitys and is smaller and lighter than rose pollen because grass pollen is dispersed by wind!
The given statement is true.
- On one side of the membrane, carrier proteins bind to molecules or ions and release them on the opposite side.
- In order to allow target molecules or ions to diffusely pass through the membrane without interfering with one another, channel proteins make holes/pores that permeate the membrane.
- The specific solute to be transported is bound by carrier proteins (also known as carriers, permeases, or transporters), which then go through a series of conformational changes to move the bound solute across the membrane.
- In contrast, channel proteins have significantly weaker interactions with the solute being conveyed.
- While some channel proteins are always open, others are "gated," which means that they respond to a specific stimulus to either open or close the channel (like an electrical signal or the binding of a molecule).
- Transport proteins known as channel proteins contain a hydrophilic channel via which specific molecules or ions can pass across the membrane (Ex: aquaporins for water). Transport proteins known as carrier proteins bind to molecules and modify their structure to move them across the membrane.
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States of matter. thats the answer ma boiii
Answer:
Cassie and her brothers, Stacey, Christopher-John, and Little Man, are walking to school on the first day of the school year, dressed in their Sunday best. T.J. joins them and tells them about how a man named Berry was nearly burned to death by white men the previous night. T.J. also tells how he avoided trouble by blaming it on his little brother, Claude. For this, the Logan children grow angry with him. A school bus filled with white children speeds by, showering the children with red dust as it passes. Jeremy, a white boy who is often beaten for walking to school with and associating with the Logans, soon joins them. But as a group of white children including his sister runs past, he has to leave them, and head towards the Jefferson Davis County School, the white school, where the Mississippi state flag, with its confederate emblem, flies above the American flag.
The Logan children soon arrive at Great Faith Elementary and Secondary School. Cassie, a fourth-grader, is not eager to please her teacher, Miss Crocker. She is assigned a seat in the first row. She and the other students are surprised to learn that this year they will have books. However, the books are very old and dirty; they are books no longer needed at the white school. This infuriates Little Man and Cassie, and they are both whipped for trying to refuse the books. After school, Cassie runs to tell the trouble to her Mama, who is a teacher in the seventh grade. But Miss Crocker is already there. Eavesdropping, Cassie hears her Mama agree with Miss Crocker that she should have punished her children for disobeying their teacher. At the same time, she takes a white paper and glues it over the inside cover of the children's books, hiding the table that showed that the books used to be used by white students and were now issued to "nigras."
They lack roots and any sort of transportation system within their them, so they place themselves in moist environments close to water. This way, they can absorb water quickly and easily.