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julia-pushkina [17]
3 years ago
10

I need to make a mark scheme for this question

Biology
1 answer:
Lisa [10]3 years ago
8 0

Answer:

the organs of the digestive system are:

Mouth: The mouth is the region where the first processes of digestion begins. Saliva in the mouth mixes with the food as we chew it.

Pharynx and the esophagus:

Food travels from the mouth to the pharynx and esophagus. In the pharynx, swallowing takes places partially as well as non- partially.

Stomach: The stomach is the organ where most of the digestion takes place. The stomach secretes various enzymes for the digestion of food.

Small intestine: The small intestine comprises of  duodenum, jejunum, and ileum. Enzymes released by the pancreas and bile from the liver help in digestion here. Re-absorption of the nutrients takes place here.

Large intestine: The large intestine comprises of colon, rectum and anus. The excretion of waste takes place here.

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In swine, when a pure-breeding red is crossed to a pure-breeding white, the F1 are all red. However, the F2 shows 9/16 red, 1/16
lana [24]

Answer:

Parent 1 : AaBb

Parent 2: aaBb or Aabb

Explanation:

In this cross two genes are involved and they are duplicate genes with cumulative effect i.e. individually they show the same phenotype but when together, they produce a new phenotype. Here,

A_B_ = red

aaB_ = sandy

A_bb = sandy

aabb = white

The progeny in question has a white piglet (aabb) so it must have got a set of "ab" gametes from both parents. Since parent 1 has red phenotype it should also have one A and B allele. Hence its genotype is AaBb.

Parent 2 should also contribute an "ab" pair to white piglet and it has sandy colour which is produced by either an A allele or a B allele so its genotype should be Aabb or aaBb.

4 0
4 years ago
Every day, Americans use less than 3.5 gallons of water to cook, clean, flush toilets, and bathe.
Marianna [84]
This is false because people could use way much water
7 0
3 years ago
The lateral rotators act on the __________. the lateral rotators act on the __________. sacrum os coxae femur lumbar vertebrae
lukranit [14]

Answer:

The correct answer is femur.

The lateral rotators act on the <u>femur</u>.

Explanation:

The lateral rotators is a group of muscles composed by the piriformis, the external obturator, the twin (superior and inferior), the femoral square and the internal obturator, which rotate the thigh outwards (they rotate the thigh laterally away from the midline of the body), that is, they act on the femur, rotating laterally the hip joint, in addition they help to keep the head of the femur inside the acetabulum.

6 0
3 years ago
Germ cell definition​
Stella [2.4K]

Answer: A cell containing half the number of chromosomes of a somatic cell and able to unite with one from the opposite sex to form a new individual; a gamete. Good luck!

Explanation:

8 0
4 years ago
Based on radiometric dating, the oldest rocks scientists have found on Earth are 4.6 billion years old, but not ALL rocks are th
natita [175]

Answer:

The answer to your question is below

Explanation:

Because similar to living things, some rocks are formed and it takes a long period to degrade them. During this period new rocks are born, some of these rocks can react with some compounds of the environment and can form new rocks or can be degraded.

What I try to say is that rock formation takes a lot of time and while some rocks disappear new rocks are created.

6 0
3 years ago
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