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3 years ago

Why are the four macro molecules important?

1 answer:

4 0

These molecules - proteins, lipids, carbohydrates, and nucleic acids - make up every component in living things. Lipids are used as energy and form making membranes that all living things have. Carbohydrates are the primary source of energy for many living things. Proteins are used to build tissues or enzymes. Nucleic acids are used for the genetic material to be transferred to offspring.

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Ethan is modeling food chains he observes in his local ecosystem. Which of these models represent possible food chains he might

alexdok [17]

Answer:

A & C

Explanation:

Primary producers are always at the bottom of the food chain because they are the entry point of energy into the ecosystem. The producers are organisms that produce their own 'food' from abiotic factors and include photoautotrophs and chemoautotrophs. These organisms are then consumed by primary consumers who are subsequently consumed by secondary consumers who are subsequently consumed by tertiary consumers to decomposers. The number of consumers up the food chains can vary with ecososyems and can be an indication of how biodiverse they are. This is how energy and matter are passed up an ecosystem and recycled.

8 0

4 years ago

In horses, black color(B) dominates chestnut color(b). The trotting gait(T) dominates the pacing gait (t). A cross is made betwe

bulgar [2K]

Answer:

<h2>a. BbTt;</h2><h2>b. BbTt X BbTt ;</h2><h2> Parent 1: BT bt Bt bT </h2><h2> Parent 2: BT bt Bt bT ;</h2><h2>c. BBTT , BbTt , BBTt , BbTT , BbTt , BbTt , BBTt , BbTT , BBTt , Bbtt , BBtt , BbTt , BbTT , bbTt , BbTt , bbTT.</h2><h2> d. 12:1:1:2</h2>

Explanation:

As given Block color is dominant over chesnut color, so B is dominant over b.

Chestnut color=bb ;

Trotting gait is dominant over pacing gait, so T is dominant over t .

Pacing gait=tt

Now; cross between

(a) homozygous black, pacing gait is= BBtt; and horse homozygous for chestnut color, trotting gait is= bbTT

BBtt x bbTT

gametes are ; Bt and bT,

Progeny are BbTt, BbTt,

All progeny will be BbTt heterozygous Black color and heterozygous trotting gait

b. a cross is made between two horses, both of who are heterozygous black trotter = BbTt X BbTt

Possible gametes of each parent are;

Parent 1: BT bt Bt bT

Parent 2: BT bt Bt bT

c. Punnett square and all the possible gene combinations that results are;

Cross between these gametes

BT bt Bt bT

possible gene combinations ; BBTT , BbTt , BBTt , BbTT , BbTt , BbTt , BBTt , BbTT , BBTt , Bbtt , BBtt , BbTt , BbTT , bbTt , BbTt , bbTT.

d. expected phenotype ration of the offspring.

Black color and trotting gait horse 12: chestnut and trotting gait horse 1: Black color pacing gait horse 1: chestnut and trotting gait horse 2.

so 12:1:1:2

6 0

4 years ago

The Robinson projection map is considered very useful because _____.

vekshin1

The Robinson projection map is considered very useful because most distances, sizes, and shapes are accurate.

4 0

3 years ago

Read 2 more answers

Why is DNA replication more complex in eukaryotes than in bacteria?

brilliants [131]

II'm in 7th grade so this may not help but I have learned this and I thought I would share it anyways. In eukaryotic cells the DNA is in the nucleus, eukaryotic evolved from prokaryotic cells, DNA is located in the nucleus, and lastly and examples of a eukaryotic cells are animals, plants, and fungi. I hope this somewhat helped you and that you get a good grade !!

3 0

4 years ago

PLEASE HELP MARKING PEOPLE AS BRAINLIST ALL DAY

kirill115 [55]

Answer:

C.) Nucleus

Explanation:

Chromatin is the main carrier of genetic information and is non-randomly distributed within the nucleus.

8 0

3 years ago

Read 2 more answers