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Kamila [148]
2 years ago
13

The chorion develops into the ____________, a pancake-like structure that is attached to the endometrium and is about 7 inches i

n diameter and 1 to 2 inches thick
Biology
1 answer:
dezoksy [38]2 years ago
7 0
The chorion develops into the PLACENTA, a pancake-like structure that is attached to the endometrium and is about 7 inches in diameter and 1-2 inches thick.

Placenta is an organ present inside the uterus that contains the fetus and connects the fetus to the uterine wall of the mother. The fetus derives all the nutrients and food from the mother with the help of placenta.
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For many generations, the following genotypic frequencies were observed in a large population of dinosaurs: 4 percent AA, 32 per
Usimov [2.4K]

Answer:

C) 19.7%

Explanation:

The new population distribution after climate change wiped out homozygous recessive dinosaurs is:

AA = \frac{4}{4+32}=\frac{1}{9}

Aa = \frac{32}{4+32}=\frac{8}{9}

The percentage of offspring of this new population that are homozygous recessive is given by:

P(Aa\ x\ Aa) = \frac{8}{9} *\frac{8}{9} =\frac{64}{81} \\P(aa) = \frac{1}{4}\\P(Aa\ x\ Aa) \cap P(aa) = \frac{64}{81}*\frac{1}{4} =0.197=19.7\%\\

19.7% of these newborn dinosaurs died

8 0
2 years ago
_____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment.
Svetllana [295]
THE ELECTRON TRANSPORT CHAIN is responsible for releasing energy that is used to pump hydrogen ion. The energy which is released in form of electrons are passed through the electron transport chain and used to pump protons into the thylakoid compartment of the plant cell.
4 0
2 years ago
Hormones are _____. see concept 45.1 (page 998) signals that must interact with dna in order to be effective always proteins pro
DENIUS [597]
<span><span>The answer is ‘transported in blood or hemolymph are all under the control of the pituitary gland’. The pituitary is the master gland because it controls functions of other endocrine glands that produce different hormones.</span> <span>Hormones allow communication between organs and tissues for physiological regulation and behavioral activities, such as digestion, metabolism, respiration, and tissue function. </span></span>




4 0
2 years ago
Jezelyn needs to create a project that shows geographic isolation in action and decides to make a video which of the following w
Fynjy0 [20]

Question: Jezelyn needs to create a project that shows reproductive isolation in action and decides to make a video. Which of the following would make the best project?

a video that shows a large river that has penguin populations on both sides

a video that shows penguin species that have different mating dances a video that shows

a penguin that is laying eggs a video that shows penguins in a tidal pool and an open ocean

Answer:

The right option is a video that shows penguin species that have different mating dances.

Explanation:

Reproductive isolation is the inability of animals of closely-related species to interbreed with one another successfully as a result of various differences which can be ecological, behavioral, psychological, or genetic. From the question given above, the difference in the mating dances of the penguin species will not allow the animals to unite and mate. This condition describes reproductive isolation. Reproductive isolation is caused by mating differences, sterility or environmental barriers that eventually lead to the adaptive splitting into two species. However, reproductive isolation is not sufficient but internal barriers to gene flow are required for speciation to evolve.

3 0
2 years ago
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A gardener is concerned that her greenhouse is getting too hot from too much light, and seeks to shade her plants with colored t
valkas [14]
<span>In getting her plants to grow, the gardener should use the color blue for her colored translucent sheets. The reason for this is because it will be absorbed by the plants, causing them to get the light absorption that they so desperately need. Other colors, such as green, are absorbed into plants (as can be observed by their green colors), and thus they do not absorb the light through this color.</span>
5 0
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