Sea animals and plants use substances dissolved in Earth's ___________ to form bones and shells.

Answers

Answer 1

Answer: Sea animals and plants use substances dissolved in Earth's oceans to form bones and shells.

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What is produced in transcription?

Answers

RNA molecules are produced during transcription, the molecules being the ribonucleotides of mRNA

What evidence of body segmentation do lancelets display?

Answers

Lancelets have a somewhat fish-like body. However, the don't have fins or any other limbs. They are not good swimmers, and have a relatively poorly developed tail. Moreover, they do not possess a true form of a skeleton, they just have some gill slits, mouth and that tail I already mentioned.

Hope this helps

A scientist is trying to determine the relationship between clams, snails, and squid. When she generates a molecular clock, she is surprised to see that clams and squid are more closely related than clams and snails. Which did the molecular clock data show?Clams and squid have been evolving separately for a longer time than clams and snails.
Clams and squid have been evolving separately for a shorter time than clams and snails.
Clams and snails have more in common genetically than clams and squid.
Clams and snails are more similar in related structures than clams and squids.

Answers

Answer:

The correct answer is the second statement.

Explanation:

The molecular clock refers to a procedure in molecular evolution that associate the time of divergence between the two species with the number of molecular differences determined between the sequences of DNA or proteins.

The more genetically associated, the shorter will be the separation time between the two species. Due to this, as clams and squid are more closely associated it can be concluded that these species look more genetically identical, and have evolved distinctly for a brief time duration in comparison to the clams and snails.

Answer:

B. Clams and squid have been evolving separately for a shorter time than clams and snails.

Explanation:

Edge 2021

Vegetable farmers often plant soybeans every few years. Rotating crops breaks up the life cycles of many insect pests, and the soybean plants provide the soil with nitrogen. Other crop plants need the nitrogen to grow well. A field of soybean seeds has been planted on a farm in Indiana. As soon as the first leaves emerge from the seed, photosynthesis begins. Which substance is the chemical food source for the soybean plants? A. sunlight
B. Glucose
C. Carbon Dioxide
D. Water

Answers

The glucose is the chemical food source for the soybean plants. The correct option is B.

What is glucose?

Glucose, also known as dextrose, is a type of carbohydrate known as a simple sugar, this can be found in both plants as well as animals.

The molecular formula for glucose is $C_6H_1_2O_6$ . It is found in fruits and honey and is the most abundant free sugar in the blood of higher animals.

Plants use the sun's energy to convert water and carbon dioxide into glucose, a sugar.

Plants use glucose for energy and to make other substances such as cellulose and starch. Cellulose is used to form the basic cellwalls. Starch is stored as a food source in seeds and other plant parts.

The chemicalsource of food for the soybean plants is glucose as per the given scenario.

Thus, the correct option is B.

For more details regarding glucose, visit:

brainly.com/question/2396657

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Answer:

B. Glucose This is the correct answer, my daughter just took the test

Explanation:

The elimination of a predator has no negative impacts on that predator’s prey species.a. True
b. False

Answers

Answer:

The given statement is False.

Predator-prey relationship is a biological relationship in which one organism kills and eat the other organism in an ecosystem. The organism who killed is termed as predator and the organism who is killed is termed as prey.

It helps in controlling the population size of prey, helps in slowing down the spread of the disease, and in the establishment of a healthier prey population by removing or killing the injured or sick animals.

Complete removal of the predators will lead to the overpopulation of their prey which is generally herbivores. The over-populated herds will eat more and more grass which will ultimately lead to the shortage of food.

So, the herds will starve to death.

Hence, we can conclude that the removal of predator has negative impacts on that predator’s prey species.

Answer:

False

Explanation:

List of solid mixtures in a classroom

Answers

Answer:

A mixture is a combination of two or more substances which are bound chemically. Identities of each substance is retained in the mixture.

Solid-solid mixture is sub-type of mixture which are formed by mixing two or more solids.

For example, soil (mixture of sand, silt, clay etc), gun powder (mixture of carbon, potassium nitrate, sulphur), etc.

Similarly, in class various solid mixtures are found such as:

Chalk is mixture of calcium carbonate, silt and clay.
Concrete is a mixture of cement, lime, sand, rocks, and water.
Stationery such as pen, pencil, sharpener, etc also come under solid mixtures.
Alloys are also considered as homogeneous mixture. So, bronze, brass etc found in electrical appliances are also an example of solid mixtures.

There are many things like that. Such as desks, chairs and blackboards. Almost every solid thing in a classroom is a mixture. So you can list whatever you want.

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