Bio homework help
pedigrees

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You find a fossil in your backyard. 12% of the Carbon 14 isotope is remaining. How old is the fossil?

According to catastrophists what was the rate of geological change?

Describe an adaptation to a plant's life cycle and explain how this adaptation helps the plant survive. Source StylesNormal

Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. A scheme of blood circulation of reptiles except for birds. The reptiles have a three-chambered heart that consists of two atria and one ventricle with an incomplete septum. There are two circuits: pulmonary and systemic. In the pulmonary circuit, the blood from the right ventricle is pumped in to lung capillaries and returned to the left atria. In the systemic circuit, the blood is pumped from the left ventricle to the systemic capillaries via the left systemic aorta and is then returned to the right atria. There is also one vessel going from the right ventricle to the aorta right before it branches to smaller arteries. This vessel carries mixed blood. All blood on the right side of the circuits is venous and all blood on the left side is arterial. Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart. The three-chambered heart is inferior to the four-chambered hearts of birds and mammals, limiting the evolutionary success of amphibians and nonbird reptiles. Pulmonary and systemic blood fully mixes in the ventricle of a three-chambered heart.

(No links)
Which is NOT a characteristic of unsaturated fats?
A. liquid at room temperature
B. animal fats
C. kinks in the carbon chain
D. not fully saturated with hydrogens​

Organelles are found in...
A. the blood stream of complex organisms.
B. inside most cells.
C. constantly moving between cells.

Chapter 21.1 Review
1. What characteristics of living things do viruses have?

2. Compare and Contrast How is viral reproduction different from that of cell-based organisms?

The average number of individuals of the same species per unit of area or volume at a given time is the
population's
O carrying capacity,
O birth rate.
O size.
Odensity.
O distribution.
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name two tissues which are thickened with lignin​

Which of the following contribute to dirty air?

Select three options.

• photosynthesis

• fossil fuels

• smoking

• mold

• respiration

Who formulated the Universal law of Gravitation (G)​

A) If a female spinach plant with green (GG) leaves is crossed (pollination and fertilization occur) with a male spinach plant with purple (gg) leaves. What are the genotypes of the offspring and what traits will they express including the probability or ratio.

28. Eubacteria can be distinguished from archaebacteria by
a.The presence of a true nucleus
b. Being multicellular
Difference in the makeup of cell wall
d. The presence of organelles

Which of the following is an example of a benefit of a flooded river?

A. Burial and uprooting of plants

B. Removal of leaves from tall trees

C. Deposition of nutrients in the surrounding soil

D. Decreased formation of habitats for organisms

What do you think of when you hear the word "energy?"
I
(Pls somebody answer)

plzzzz help
Commensalism is a symbiotic relationship in which one organism benefits and the other organism neither benefits nor is harmed.
Mutualism is a symbiotic relationship in which both organisms benefit.
Parasitism is a symbiotic relationship in which one organism benefits and the other organism is harmed.
Predation is a relationship in which one organism preys on (and eats) another organism.
Competition is relationship in which two organisms must fight (directly or indirectly) for resource

Objective:
Given a description of the relationship between two organisms, determine if their relationship is competition, commensalism, predation, mutualism, or parasitism.

1. Polar Bear and Seal: A polar bear hunts and captures the seal for its food. _______________________________

2. Lice and Humans: Lice attach to human hair and enjoy the warmth given off by the human. They eat tiny amounts of human blood, causing the human to have little red bumps that are quite itchy. They may also transmit disease to the human. _______________________________

3. Male lions: Adult male lions will fight each other for control over a pride and mating rights. _______________________________

4. Goby Fish and Sea Urchins: The goby fish live amongst the sea urchins and are provided protection from their predators. _______________________________

5. Wolf and Caribou: The wolf hunts and kills the caribou for its food. _______________________________

6. Bats and White-Nose Fungus: The fungus grows over the bat’s face during hibernation which can kill the bat or cause it to wake up from hibernation early and starve. ____________________________________

7. Hermit Crabs and Snails: Hermit crabs live in abandoned shells made by snails. _______________________________

8. Boxer Crab and Anemone: The boxer crab carries a pair of small anemones in its claws. When a predator approaches, it waves the anemones around which present its stinging tentacles and deters the predator. The anemones get small particles of food from the crab when it eats. _______________________________

9. Bear and Salmon: The bear catches salmon in the river and eats it for food. _______________________________

10. Grass and Oak Trees: Oak trees grow tall and put their branches out wide to collect sunlight. This shades the grass growing underneath from getting sunlight. _______________________________

11. Mycorrhizal Fungi and Plants: The mycorrhizal fungus grows into the roots of some plants and gets nutrients from the plant. The fungus helps the plant absorb inorganic nitrogen and phosphorus from the soil. Some fungi also secrete antibiotics, which can help protect the plant from parasitic fungi and bacteria. _______________________________

12. Bison and Cowbird: As bison walk through the grass, it kicks up insects like grasshoppers. These are seen and eaten by the cowbird. _______________________________

13. Mistletoe and Oak Tree: Mistletoe extracts water and nutrients from the oak tree, causing harm to the oak tree. _______________________________


14. Frog and Insect: The frog uses its long, sticky tongue to catch insects for food. _______________________________

15. Tapeworm and Dog: The tapeworm enters the dog when the dog eats feces containing tapeworm larvae. The tapeworm attaches to the dog’s stomach and feeds off of the dog’s nutrients. This often causes harm to the dog. _______________________________

Can throat cancer be inherited?

After using a chemical mutagen to generate mutations in a dna sequence, scientists noted a mutation from c to t at the 10th position within the coding region of a gene. this mutation led to a change of proline into serine at the fourth position in the resulting peptide. using this information and the sequences listed below, select all the types of mutations that occurred.

What is the percent chance the offspring will be tall plants with yellow fruit? (2nd question)

Which of the following is defined as the ability to be changed or change according to circumstance

Drag each label to the correct location on the chart.
Sort the actions and terms based on the type of pollution they directly cause.

The diagram shows part of an aquatic food web
for a stable lake ecosystem in Connecticut.
Turtles
Large fish
Small fish
Aquatic insects
Tadpoles
Water fleas
Rotifers
Algae
What is the source of energy for the algae?
A waves
B. sunlight
C. bacteria
D. rotifers, water fleas and tadpoles

people who take antibiotics are always told to complete the treatment rather than stop taking the medication when they feel better suggest two reasons why people are given this advice​

What are the 3C’s that plant cells have, but animal cells lack?

Mitosis is responsible for growth, repair, and maintenance in an organism because

Which sequence shows a correct pathway for the
flow of energy in a food chain?
A) bacteria → grass → fox → owl
B) grass grasshopper → frog - snake
C) fungi - beetle → algae - mouse
D) algae → snake → duck → deer

. ___________________ is the process of plants releasing oxygen into the environment?

Which of the following sentences is the best example of formal language?
A. I've gotten totally into theater lately, but opera is too much for me; I
don't know why.
B. When I see one of my acting idols on the screen, I'm like wow,
how'd he do that?
C. I wanted to ask if you wanna come to this thing I'm in on Saturday
night?
D. I would like to extend to you an invitation to my recital, which takes
place this weekend.
SUBMIT

Pls help and thank youuuu:)

Dichotomy means _____.