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3 years ago

I need help on this question.

Biology

1 answer:

Alecsey [184]3 years ago

4 0

Earth’s global temperature has changed greatly in the past hundreds of years. This is due to how much energy the planet is receiving from the sun and how it radiates back. Another cause is humans, due to deforestation, burning of fossil fuels, pollution, etc.

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Which organism would be classified as an arthropod? starfish earthworm snail crab

Leokris [45]

I believe the answer is a earthworm

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3 years ago

Read 2 more answers

What’s a half life of a penny

OLEGan [10]

Answer:

Radioactive isotopes has a characteristic half life that is ranging from less than a second to million of years.

Explanation:

One of the characteristics of radioactive material is that the radio active isotopes instantly gives off particles. This process is termed as radio active decay.For this activity pennies are used pennies headed up it means that nuclei have undergone radio active decay, or tails up it means that nuclei that haven't yet decayed.

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4 years ago

Where do convection currents occur.

-Dominant- [34]

Answer:

the answer is C-in areas with different air pressures

Explanation:

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated.

3 0

3 years ago

Read 2 more answers

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

How do scientists ensure that autoclaved materials were actually sterilized? View Available Hint(s)

Pie

Answer:

They may place a sterility indicator with special dye to detect the growth of endospores.

Explanation:

A sterility indicator should be placed inside and in the center of the item that will be autoclaved, if the indicator changes colors that means that the endospores were not killed with the sterilization process and the bacteria survived the high temperatures of the autoclave.

3 0

3 years ago

I need help on this question.​

I need help on this question.