Answer:
Phloem
Explanation:
Phloem is the vascular tissue responsible for transporting organic nutrients around the plant body, carries dissolved sugars from the leaves (their site of production) or storage sites to other parts of the plant that require nutrients.
The phloem, part of a plant's vascular system, is the structure that transports organic molecules like sucrose, which is a product of photosynthesis, from the leaf to other parts of the plant. This process involves the active transport of these molecules against a concentration gradient with the aid of ATP and a carrier protein.
The structure used to transport organic molecules from the leaf to other parts of the plant is called the phloem which is part of the plant's vascular system. Products of photosynthesis, known as photosynthates, such as sucrose, are produced in the leaf's mesophyll cells. They are then translocated through this phloem to other parts of the plant where they are either used or stored. This is achieved through cytoplasmic channels called plasmodesmata which connect the mesophyll cells to phloem sieve-tube elements (STEs) in the vascular bundles. The photosynthates, including sucrose, are actively transported against its concentration gradient (which requires ATP) into the phloem cells. This is done by using the electrochemical potential of the proton gradient linked with a carrier protein referred to as the sucrose-H+ symporter.
#SPJ12
Answer:
False
Explanation:
The first living thing on planet earth was a single celled species commonly termed as prokaryotic. These simplest forms of species were made up of primordial chemicals which some how under specific environmental condition developed into proteins and RNAs thereby generating higher forms of life. The earliest form of single celled prokaryotes were termed as bacteria and archae. These tiny creature were observed for the first time some 4 billion years ago.
OPTIONS:
a. The organisms vary in trait
b. The variation is inherited
c. More young are born than can survive
d. Some individuals are better adapted to the environment
Answer:
d. Some individuals are better adapted to the environment
Explanation:
Kettlewell’s biological experiment, which was conducted in England, was to study the evolutionary changes taking place in trees in relation to the appearance of dark-colored moth.
It was observed that white moths were more common before the industrial revolution. After the industrial revolution, which changed the background of the environment of the moths due to pollution, the moths became easily seen and obvious to predatory birds.
It was discovered that peppered moths were selectively preyed on by birds depending on their body color, which serves as the most important factor that determines if moths can survive predation by blending with the background of their environment. This led to the evolving of moths of their color to blend with the background of their environment, which makes them hide from the birds that prey on them.
Kettlewell was trying to verify the factor in evolution by natural selection, which says, “some individuals are better adapted to the environment”.
Chemical and gaseous exchange takes place only across capillary walls
Sorry for the late answer but I hope that's still help !