Hi, I'm traveling through New Zealand and found a little schell/amor on the beach on the east-coast of New Zealands northern island. It's around 3cm long. At first I thought it would be a creb shell but if you look closely you ca
Glial cells make up over 80 of the human brain in both number of total cells and volume occupied by ...
Glial cells make up over 80 of the human brain in both number of total cells and volume occupied by the nervous system. Indicate whether the statement is true or false
Considering the experiments of the Darwins, Boysen-Jensen, Paal, and Went, what do you conclude ...
Considering the experiments of the Darwins, Boysen-Jensen, Paal, and Went, what do you conclude about phototropism? A) We still do not know the mechanism for phototropism. B) The substance that regulates phototropism is produced in the tips of plan
If Wents placed his agar blocks only halfway on the cut surfaces of grass shoots with their tips ...
If Wents placed his agar blocks only halfway on the cut surfaces of grass shoots with their tips removed, what should he have observed? A) The grass shoot would not grow toward a light. B) The grass shoot would grow toward a light when the agar blo
If Paal grew his plants using a light source that was directly overhead, what should he have observed?
If Paal grew his plants using a light source that was directly overhead, what should he have observed? A) The grass shoot would not grow. B) The grass shoot would grow upward and straight. C) The grass shoot would grow in the opposite direction fr
Boysen-Jensen also used the mica to separate a tip of a grass shoot only partially, by cutting the ...
Boysen-Jensen also used the mica to separate a tip of a grass shoot only partially, by cutting the tip halfway and inserting a wafer of mica into the cut. If this experiment supported the Darwins' hypothesis, what would Boysen-Jensen have observed?
Which approach could an organic farmer use to deal with nitrogen deficiency?
Which approach could an organic farmer use to deal with nitrogen deficiency? A) plant legumes in alternate years and fertilize the soil with compost B) apply synthetic fertilizers that provide nitrogen C) plant legumes in alternate years and use s
Some farmers practice crop rotation, alternating between planting nonlegumes such as corn or wheat ...
Some farmers practice crop rotation, alternating between planting nonlegumes such as corn or wheat one year and legumes the next year. What is the advantage of crop rotation? A) The legumes in the rotation will transfer nitrogen, phosphorus, and pot
A scientist finds seeds of an unknown plant on top of the soil in a desert. She measures the ...
A scientist finds seeds of an unknown plant on top of the soil in a desert. She measures the concentration of two hormones in these seeds. After it rains, she collects more of these seeds, and finds that the concentration of the two hormones has chan
The figure below shows plants originally grown in the dark, and then a light is added on one side ...
The figure below shows plants originally grown in the dark, and then a light is added on one side only (arrow). Predict the response of the plants to the addition of the light source.
A) Auxin becomes concentrated on the lighted side of the
In the figure above, which of the following produce nitrogen in a form that can be used directly by ...
In the figure above, which of the following produce nitrogen in a form that can be used directly by the plant, without need for conversion? A) nitrifying bacteria only B) ammonifying bacteria only C) nitrogen-fixing bacteria only D) ammonifying
Examine the figure above. Which of the following add ammonium to the soil by decomposing organic matter?
Examine the figure above. Which of the following add ammonium to the soil by decomposing organic matter? A) nitrifying bacteria only B) ammonifying bacteria only C) nitrogen-fixing bacteria only D) nitrifying bacteria and nitrogen fixing bacteria
Three very popular strawberry cultivars grown by farmers in the United States are Earliglow, Ozark ...
Three very popular strawberry cultivars grown by farmers in the United States are Earliglow, Ozark Beauty, and Tristar. Earliglow produces all of its fruit in the early summer (June-bearing). Ozark Beauty produces fruit from mid to late summer (everb
Oats are eaten by humans as oatmeal or rolled oats, and as feed for livestock such as cattle. In ...
Oats are eaten by humans as oatmeal or rolled oats, and as feed for livestock such as cattle. In order for an oat plant to make the part we eat (the seed), it must flower and be pollinated. Typically, oat plants flower when days are lengthening (i.e.
Across the globe, billions of people eat rice. In order to make rice grains (the seed), a rice plant ...
Across the globe, billions of people eat rice. In order to make rice grains (the seed), a rice plant must flower and be pollinated. Rice plants flower only after days become shorter (i.e., summer to autumn). What is the best classification for rice?
Which of the following best describe(s) the dependencies of most flowering plants?
Which of the following best describe(s) the dependencies of most flowering plants? I) Many depend on insects or other animals for pollination. II) Many depend on insects or other animals for seed dispersal. III) Many depend on fungi to help them a
Which of the following best describes night-neutral plants?
Which of the following best describes night-neutral plants? A) The plants flower at night. B) Plants tend to flower when nights become longer. C) Plants tend to flower when nights become shorter. D) The flowering in these plants is not affected b
Experimental plants that were sent up in space shuttle missions did not exhibit all of their normal ...
Experimental plants that were sent up in space shuttle missions did not exhibit all of their normal tropisms. Which of the following responses would you most expect to be lacking from these plants? A) gravitropism B) photoperiod C) thigmotropism
Which of the following is exemplified by a pea tendril contacting a string or wire and coiling ...
Which of the following is exemplified by a pea tendril contacting a string or wire and coiling around it for support? A) gravitropism B) photoperiod C) thigmotropism D) phototropism
Which of the following best describes the condition of a twig if the auxin produced by its apical ...
Which of the following best describes the condition of a twig if the auxin produced by its apical meristem is conveyed equally down all sides? A) It will elongate. B) It will branch near its tip. C) It will produce a flower. D) It will bend to on
Which of the following plant hormones affect(s) development in the plant body?
Which of the following plant hormones affect(s) development in the plant body? I) auxin II) cytokinin III) gibberellin A) I B) I and II C) III D) I, II, and III
Trace the flow of a water molecule that is used during photosynthesis.
Trace the flow of a water molecule that is used during photosynthesis. A) stoma xylem root hair mycorrhiza B) soil root hair xylem stoma atmosphere C) soil root hair xylem leaf cell D) soil xylem leaf cell atmosphere
Early in the spring, cherry trees produce flowers, even before their leaves develop, by using sugars ...
Early in the spring, cherry trees produce flowers, even before their leaves develop, by using sugars that were stored in their roots the previous year. While cherry flowers are developing, we would expect the phloem pressure near flowers to be ______
In a strawberry plant in the summer, the leaves are ________ and the strawberry fruits are ________.
In a strawberry plant in the summer, the leaves are ________ and the strawberry fruits are ________. A) sugar sources sugar sources B) sugar sources sugar sinks C) sugar sinks sugar sources D) sugar sinks sugar sinks
A farmer decides she wants to grow certified organic corn and sets out to meet all USDA standards to ...
A farmer decides she wants to grow certified organic corn and sets out to meet all USDA standards to do so. Her crop grows well for the first 3 years; however, she notices during the 4th and 5th years that plants are getting smaller and producing muc
A location in a plant where sugar is being received for storage or consumption is ________.
A location in a plant where sugar is being received for storage or consumption is ________. A) a sugar sink B) a sugar source C) phloem sap D) phloem tube
Which of the following explains how phloem sap moves within a plant?
Which of the following explains how phloem sap moves within a plant? A) cohesion-tension mechanism B) gravity pulls the phloem sap down C) pressure-flow mechanism D) transpiration
Transpiration pulls water up a plant because of two mechanisms: ________ describes water molecules ...
Transpiration pulls water up a plant because of two mechanisms: ________ describes water molecules sticking together and ________ describes water molecules sticking to the walls of the xylem. A) cohesion... adhesion B) adhesion... cohesion C) adhe
Which of the following best describes the mechanism that causes stomata to open?
Which of the following best describes the mechanism that causes stomata to open? A) Water accumulates below the opening and eventually causes the stoma to open. B) A large bubble of oxygen accumulates below the stoma and eventually causes it to ope
