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hichkok12 [17]
3 years ago
6

What is another name for the dorsal surface of a starfish

Biology
1 answer:
kozerog [31]3 years ago
5 0
Another name for it is an Oral
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He hypothesis that a mobile compound produced in the coleoptile tip controlled its bending toward directional light was tested b
Fynjy0 [20]

The coleoptiles which tips were removed will be short and straight while coleoptiles which were cut with the tips separated by mica will be short and straight. Ceoptiles which were cut tips and separated by agar they will be tall and straight.

The set of coleoptiles which will be left in the darkness for 24 hours will be tall and bent. While the set which is in the direction of light for 24 hours will be tall and bent.

Observation is that coleoptile will grow straight if the chemical was evenly distributed and curved away from block side as if growing towards the light because dark side has the higher concentration of auxin.

8 0
3 years ago
Select the correct answer from each drop-down menu.
vaieri [72.5K]

Answer:

the amount of calcium is variable.

Explanation:

osteoporosis is an illness that is caused by lack of calcium in a person's body.

6 0
4 years ago
A homosexual orientation appears to be the result of _____.
Black_prince [1.1K]
<span>a. genetics and biology playing a dominant role. Scientists and mental health professionals have argued that sexual orientation, which gives rise to homosexuality, is not a choice but a result of biology, inborn hormonal factors and genetics</span>
6 0
3 years ago
In a standard deck of playing cards, there are four suits (red suits hearts and diamonds, black suits spades and clubs). Each su
Lapatulllka [165]

Answer:

Probability can be calculated by dividing the number of possible outcomes by the total number of outcomes.

probability= \frac{possible outcomes}{total outcomes}

There are 4 suits each with 13 cards (10 number and 3 face cards)

Total number of cards = 13 x 4 = 52

1. Probability of having a face card:

There are 3 face cards in each suite and there are four suits in total. Thus, total number of face cards = 3 x 4 = 12

Total number of cards in a deck = 52

Probability of drawing a face cards = \frac{12}{52} = 0.231

2. Probability of drawing a red card:

There are two red suits (red suits heart and red diamonds) each having 13 cards. Thus, total number of red cards = 13 x 2 = 26

Total number of cards in a deck = 52

Probability of drawing a red card = \frac{26}{52} = 0.5

3. Probability of drawing a red face card:

There are two red suits (red suits heart and red diamonds) each having 3 face cards. Thus, total number of red cards = 3 x 2 = 6

Total number of cards in a deck = 52

Probability of drawing a red card = \frac{6}{52} = 0.115

3 0
3 years ago
A strong covalent bond between adjacent nucleotides is: a) a van der Waals bond. b) an ionic bond. c) a phosphate bond. d) a hyd
zhuklara [117]

Answer:

The correct answer will be option-E

Explanation:

The structure of DNA revealed by Watson and Crick showed that Two strands of DNA are present in the intertwined state forming helix representing DNA as a double helix.

Each strand of DNA is made up of the monomer unit of DNA called nucleotide where each nucleotide binds to another nucleotide through weak covalent bond called phosphodiester bond.

The phosphodiester bond is formed between the 3’-OH group of one nucleotide to 5’ phosphate group of another nucleotide. In this way, the phosphate-sugar molecule forms the backbone of the DNA molecule.

Thus, option-E is the correct answer

8 0
3 years ago
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